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                              6H308-24 & 6H308-48
                           Firmware Version 4.08.12
                                 January 2001

 

----------------------------------------------------------------------------
 INTRODUCTION:
----------------------------------------------------------------------------
 This document provides specific information for version 4.08.12 of firmware
for the 6H308-24 & 6H308-48. This release supports 802.1D/Q and SecureFast
2.00.27 switching. The following hardware platforms are supported by this
firmware release:

 2E253-49R     2H252-25R     2H253-25R     2H258-17R
 6E233-49      6H202-24      6H203-24      2H252-25RDC
 6H253-13      6H258-17      6H259-17      6H252-17
 6H262-18      6H302-48      6H303-48      6G306-06
               6H308-24      6H308-48

 It is recommended that one thoroughly review this release note prior to the
installation or upgrade of this product.


----------------------------------------------------------------------------
 Firmware Specification:
----------------------------------------------------------------------------

 Status               Version No.     Type         Release Date
 Current Version      4.08.12         Customer     January 2001
 Previous Version     4.07.09         Customer     October 2000
 Previous Version     4.06.05         Customer     July 2000
 Previous Version     4.04.19         Customer     May 2000
 Previous Version     4.04.14         Customer     April 2000
 Previous Version     4.02.10         Customer     February 2000
 Previous Version     4.01.08         Customer     January 2000
 Previous Version     4.00.08         Customer     August 1999
 Previous Version     3.11.04         Customer     July 1999
 Previous Version     3.10.07         Customer     June 1999
 Previous Version     3.05.07         Customer     March 1999
 Previous Version     2.00.17         Customer     November 1998
 Previous Version     1.03.10         Customer     September 1998
 Previous Version     1.01.10         Customer     July 1998


----------------------------------------------------------------------------
 HARDware compatibility:
----------------------------------------------------------------------------
 This version of firmware is supported on all Hardware revisions.

 Boot PROM compatibility
 This version of firmware supports all Boot PROM versions.


----------------------------------------------------------------------------
 Network Management Software Support:
----------------------------------------------------------------------------

 NMS Platform                                       Version No.    Module No.
 SPECTRUM                                           5.0            Rev. 1
 SPMA (Spectrum Portable Management Application)    3.2            Rev. 1
 SPEL (Spectrum Element Manager)                    2.02.00        N/A
 SmartSwitch ATM Administrator                      2.3.16         N/A
 NetSight Element Manager                           2.2.1          N/A

 If you install this image, you may not have control of all of the latest
features of this product until the next version(s) of network management
software. Please review the software release notes for your specific network
management platform for details.


----------------------------------------------------------------------------
 SUPPORTED FUNCTIONALITY:
----------------------------------------------------------------------------

 Features Summary
 3rd Generation Module Proxy Function for Matrix E7

 Multi-Layer Frame Classification

 Switch Configuration Upload/Download

 IGMP Version 1 and 2 Support

 802.1D Traffic Class Expediting (previously known as 802.1p Traffic
Management/ Dynamic Multicast Filtering)

 802.1Q VLAN tagging and identification

 GARP protocol support including GMRP and GVRP

 SNMP/IP access control lists

 Support for the following HSIMs:

 HSIM-FE6 HSIM-F6

 HSIM-G01 HSIM-G09

 HSIM-W6 HSIM-W84

 HSIM-A6DP HSIM-SSA710

 HSIM-SSR600

 HSIM-W85 HSIM-W87

 Support for the following VHSIMs:

 VHSIM-G6 VHSIM-A6DP

 VHSIM-G02 VHSIM2-A6DP

 IP Fragmentation

 Local Management via TELNET, HTTP, RS232

 Port Mirroring

 RMON

 Runtime Address Discovery

 Runtime Image Download

 SmartTrunk Link Aggregation

 Rate Limiting

 WebView Management


----------------------------------------------------------------------------
 Installation and Configuration Notes:
----------------------------------------------------------------------------
 In general, the product will be shipped to you pre-configured with this
version of firmware. If you would like to upgrade an existing product, please
follow the TFTP download instructions that are included with your Users
Guide. TFTP download instructions are also available on the Enterasys Support
web site at:

 http://www.enterasys.com/support/techtips/tk0020-9.html

 If you are downloading this firmware to a module or modules operating in
Distributed Chassis Management Mode within a SmartSwitch 6000*, and you wish
to use the chassis IP address, you must be connected to one of the front
panel ports of the module you are downloading. In order to download to the
chassis IP address the community name string must include the slot number.
For example, to download a module in slot one, a community name of public.1
would be used (assuming the super-user community name was public).
Non-Runtime downloads to the chassis IP address are not allowed. Please
consult your Users Guide for more details on performing firmware downloads.

 *Distributed Chassis Manager is not supported on the Matrix E7

 Modules running this firmware version default to Distributed Chassis
Management mode when installed into a SmartSwitch 6000**. An individual IP
address does not need to be assigned to each module if a chassis IP address
has been assigned. The management mode field in the General Configuration
Screen of Local Management allows a user to select whether a module will
operate in Distributed or Standalone mode. Changing this value will cause the
module to reboot. **Distributed Chassis Manager is not supported in
SecureFast mode.

 Distributed Chassis Management (DCM) is not supported in the Matrix E7
chassis.

 Module Generations and Chassis Definitions

 Part #     Description
 6C107      7-slot Matrix E7 chassis
 6C105      5-slot SmartSwitch 6000 chassis
 6X1XX      1st generation module, SmartSwitch 6000 family
 6X2XX      2nd generation module, SmartSwitch 6000 family
 6X3XX      3rd generation module, SmartSwitch 6000/Matrix E7 family
 2X2XX      2nd generation standalone switch, SmartSwitch 2000 family

 note: where X is a wildcard

 The second and third generation modules default to an 802.1Q operational
mode. In order for the modules to maintain backward compatibility with first
generation SmartSwitch 6000 modules, which default to an 802.1D operational
mode, the backplane ports do not insert an 802.1Q Frame Tag when forwarding
traffic to other modules. If 802.1Q VLANs are configured on modules, then the
backplane ports will need to be configured by the user as 802.1Q Trunk ports
for all second generation modules. The first generation modules automatically
configure their backplane ports as 802.1Q when changed from the default
operational mode to the 802.1Q VLAN mode.

 SmartTrunk
 This version of firmware supports SmartTrunk, Cabletrons Link Aggregation
feature. Below is a matrix that details the other SmartSwitch platforms and
the firmware versions required to operate properly with this version of
firmware.

 Product Line                                      Firmware Version Required
 First Generation SmartSwitch 2000/6000            4.05.09 or higher
 SmartSwitch 9000 9X5XX series                     1.01.10 or higher
 SmartSwitch 9000 9X4XX series                     1.11.08 or higher
 SmartSwitch Router (SSR-2000, 8000, and 8600)     2.0 or higher

 SmartTrunk with Non-Enterasys products
 SmartTrunk has been successfully tested with some other vendors Link
Aggregation methods. It is usually necessary to disable the SmartTrunk link
protocol for proper operation. This is configurable in the SmartTrunk Local
Management screen. When the SmartTrunk link protocol is disabled, some of the
automated configuration protection is lost. Users must be very careful to
observe the SmartTrunk configuration rules detailed in the SmartTrunk Users
Guide. Failure to follow these configuration rules could result in unstable
network operation. This guide is available at:
http://www.enterasys.com/support/manuals .

 SecureFast
 If you are mixing 2nd and 3rd generation modules in a Matrix E7 while
running in SecureFast mode, no modules can be inserted in slots 6 and 7 of
the Matrix E7 chassis. If you are running all 3rd generation modules in the
Matrix E7 there are no slot restrictions.

 Cabletron Discovery Protocol
 By default the SmartSwitch products periodically transmit multicast CDP
frames, these frames are used by network management products, and other
switches to discover the topology of the network. CDP frames are sent by the
switches using a multicast destination address of 01-80-C2-00-00-21. This
feature can be disabled using the CDP command in Local Management.

 System Interface Numbering
 The System interfaces are numbered by MIB II as shown:

 1 - Front Panel switch port 1 interface

 2 - Front Panel switch port 2 interface

 3 - Front Panel switch port 3 interface

 . .

 . .

 n - Last Front Panel switch port n interface

 n+1 - FTM1 slot/port 1 switch interface

 n+2 - FTM1 slot/port 2 switch interface

 . .

 . .

 n+6 - FTM1 slot/port 6 switch interface

 n+7 - Host in-band management interface

 n+8 - SmartTrunk group 1

 . .

 . .

 n+13 - SmartTrunk group 6

 Source Address Table
 The default size of Source Address Table (SAT) has been changed from 16,000
entries to 8,000 entries. The SAT size can be changed back to 16000 entries;
however, the number of classification entries allowed is reduced. With the
SAT size set to 8000 entries, up to 500 VLAN classifications can be created,
and up to 500 priority classifications can be created. With the SAT size set
to 16000 entries up to 200 VLAN classifications can be created, and up to 200
priority classifications can be configured. For more detailed information
about SAT size and classifications refer to the Users Guide
http://www.enterasys.com/support/manuals/2-6.html

 Matrix E7 Proxy Function
 The 3rd generation modules (6X3XX) provide a function called "proxy". This
function provides 1st and 2nd generation modules (which have only 4 backplane
ports that connect to slots 1-5) with the ability to communicate with 3rd
generation modules installed in slots 6 and 7, by way of a intermediate
(proxy) 3rd generation module installed in one of the first 5 slots.

 A packet entering a port on a 1st or 2nd generation module in one of the
first 5 slots is transmitted to the FTM1 backplane connection to the 3rd
generation "proxy" module in one of the first five slots. This proxy module
can then forward that packets out its appropriate backplane port to either
slots 6 or 7.

 The lowest numbered slot containing a 3rd generation module will always be
the "proxy" module. The function moves dynamically if a new lower slot 3rd
generation module is installed or removed.

 Since the "proxy" function does consume switching resources, switching
performance will be reduced on the module. For this reason, it is not
recommended that an uplink module (like the 6G306-06) perform the "proxy"
function in order to avoid performance degradation of the uplink. This is
avoided by simply installing uplink modules in the higher numbered slots and
using other 3 rd generation modules in a lower numbered slot to perform the
function.

 ATM Specific
 In order for the HSIM-A6DP, VHSIM-A6DP or VHSIM2-A6DP to operate with this
version of firmware, the optional memory upgrade kit must be installed in the
SmartSwitch 2000/6000. The Enterasys part number for this kit is

 SS-16M-DRAM-UGK.
 This version of firmware supports the ATM Forums standards for LAN Emulation
version 1.0 and 2.0 as well as UNI 3.0, 3.1, and 4.0 Signaling, and Traffic
Management 4.0 (TM). The VHSIM-A6DP, VHSIM2-A6DP, and HSIM-A6DPmodule are an
802.3 LAN Emulation (LEC) device and will operate in an 802.3 Emulated LAN
using an MTU of 1516 bytes or 1580 bytes.

 The VHSIM-A6DP, VHSIM2-A6DP and HSIM-A6DP support 32 LECs when operating in
802.1Q mode, and 16 LECs when operating in SecureFast mode.

 For SVC operation, LAN Emulation Services must be installed on the ATM
Network. At a minimum, there must be an 802.3 LAN Emulation Server (LES) and
a Broadcast and Unknown Server (BUS). Additionally, there should be a LAN
Emulation Configuration Server (LECS) on the ATM network. If there is not an
LECS on the ATM network, the ATM address of the LES must be manually entered
on the VHSIM-A6DP, VHSIM2-A6DP or HSIM-A6DP through Local Management.

 On power-up, the VHSIM-A6DP, VHSIM2-A6DP/HSIM-A6DP will automatically join a
default ELAN provided by ATM Services. The VHSIM-A6DP, VHSIM2-A6DP and
HSIM-A6DP will contact the LECS using the Configured ATM address of the LECS.
If an LECS ATM Address has not been configured (via Local Management), the
VHSIM-A6DP, VHSIM2-A6DP, AND HSIM-A6DP will use the ATM Address provided by
Interim Local Management Interface (ILMI) to set up a connection to the LAN
Emulation Configuration Server (LECS). If there is no response via ILMI, the
VHSIM-A6DP, VHSIM2-A6DP, AND HSIM-A6DP will set up a connection to the
well-known ATM address of the LECS. If a connection is not successful to the
well-known ATM address, the VHSIM-A6DP, VHSIM2-A6DP, AND HSIM-A6DP will use
the well-known VC of VPI=0, VCI=17 to connect to the LECS.

 This firmware image supports Permanent Virtual Circuits via Local Management
or the IETF AToM MIB (RFC-2515). When PVCs are used, LAN traffic is
encapsulated over ATM using RFC 1483 VC-based Multiplexing or LLC
Encapsulation for Bridged Protocols.

 HSIM-A6DP Specific
 This version of firmware supports up to 2040 SVCs on the HSIM-A6DP using
LANE 1.0/2.0 and UNI 3.0/3.1/4.0 signaling. In 802.1Q mode 64 PVCs are
allowed. In SecureFast mode 32 PVCs are allowed. Each PVC is treated as a
bridge port.

 This firmware image provides support for Bandwidth Allocation over PVC's.
When creating PVC's via Local Management, the user can specify a peak
bandwidth allowed (in Mbps) to be transmitted on each PVC. This feature is
available for PVC's only. SVCs are not allowed when using this feature.

 This version of firmware provides support for the HSIM-A6DP Traffic
Management Daughter-card (HSIM-TM-UGK and HSIM-A6DP-TM). When the TM card is
installed, the HSIM-A6DP supports the following ATM Forum Traffic Management
4.0 traffic classes:

 o UBR
 o ABR (Explicit Rate and Relative Rate)
 o nrt-VBR
 o CBR

 This version of firmware provides support for up to 64 Traffic Descriptors,
which can be assigned to any of the aforementioned classes. A single Traffic
Descriptor can be used for each PVC on the HSIM-A6DP. Traffic Descriptors (up
to eight) are assigned to a LEC or virtual port based on 802.1p priority and
transmit queue mapping. Traffic Management will carry priority across the ATM
fabric for the given QoS level.

 VHSIM-A6DP and VHSIM2-A6DP Specific
 This version of firmware supports up to 8192 SVCs on the VHSIM-A6DP using
LANE 1.0/2.0 and UNI 3.0/3.1/4.0 signaling. The number of PVCs allowed in
802.1Q mode is 64, in SecureFast mode 32 PVCs are allowed. Each PVC is
treated as a bridge port.

 This version of firmware provides support for the following ATM Forum
Traffic Management 4.0 traffic classes:

 o UBR
 o nrt-VBR
 o CBR

 This version of firmware provides support for up to 64 Traffic Descriptors,
which can be assigned to any of the aforementioned classes. A single Traffic
Descriptor can be used for each PVC on the VHSIM-A6DP. Traffic Descriptors
(up to eight) are assigned to a LEC or virtual port based on 802.1p priority
and transmit queue mapping. Traffic Management will carry priority across the
ATM fabric for the given QoS level. Please refer to the users guide for
proper utilization of this feature.

 HSIM and VHSIMs
 For the following HSIM/VHSIM modules to operate, the firmware revisions
listed below must be installed and running on the SmartSwitch 2000/6000 prior
to installing the HSIM/VHSIM. If this firmware is not running prior to
installing the HSIM/VHSIM, the SmartSwitch may not boot-up:

 VHSIM-G6 1.03.07 or higher

 HSIM-A6DP 1.03.11 or higher

 VHSIM-A6DP 3.05.07 or higher

 VHSIM2-A6DP 4.03.06 or 4.06.05 and higher


----------------------------------------------------------------------------
 Firmware Changes and Enhancements:
----------------------------------------------------------------------------

 Changes made in 4.08.12
 Added support for the 6H308-24 & 6H308-48

 Added support for SNMP/IP access control lists

 Added embedded Radius Client. This provides additional security for the
switchs management entity. For details on configuring this feature refer to
the latest User Guide located at http://www.enterasys.com/support/manuals/

 Fixed a problem in which a soft-reset of an ELS box connected Via fiber
Ethernet link to a second generation SmartSwitch module causes the
SmartSwitch to reset.

 Non Ethernet II frames are now translated correctly in configurations with
the HSIM-F6.

 Fixed a Node Alias Table initialization problem suspected of causing
occasional resets.

 Fixed a problem in which the SFS version number was not being displayed on
the LM password screen for "Enterasys" modules (as opposed to "Cabletron"
modules) or for any module installed in a Matrix E7 chassis.

 Fixed a problem in which an ATM VHSIM with APIM-67 does not forward traffic
at the proper rate according to the configuration.

 Fixed a problem in which priority information is not maintained in a frame's
Q tag when port redirection and priority classifications are configured
together.

 Fixed a problem in which the ifSpeed object would return an incorrect value
for 10/100 ports operating at 10 Mb/sec on 3rd generation blades.

 Fixed a reset problem seen when "status" changes (i.e., link up/down, new
speed, new duplex) occur on the 10/100 ports of a 3rd generation blade under
severe traffic load.

 Modified "pvc_mesh" CLI command operation to properly interact with IGMP and
flood reports out all ATM PVCs. Modified IGMP to provide support for
dynamically removing ports from its flood mask (in the event that a PVC goes
away) and for reporting the flood reports mask. Fixes connectivity problems
with pvc_mesh and IGMP.

 Fixed a port LED display problem seen on VHSIM-G6.

 Removed check for number of Fast Ethernet ports when determining whether to
allow any Gigabit Ethernet ports to be dual activated. Now, any Gig ports may
always be dual-activated

 Changes made in 4.07.09
 SecureFast version 2.00.22 has been added.

 SecureFast is now operational in the Matrix E7 chassis

 The ability to re-write the TOS field of an IP packet has been added to the
frame classification feature.

 TCP and or UDP port (socket) ranges can now be specified when configuring
Layer 4 VLAN and Priority Classification rules. This feature is especially
useful when classifying traffic patterns that does not use a constant socket
number.

 An SNMP trap is now generated if the switch detects the presence of a
loopback condition when the loopback_detect feature is enabled. The
enterprise trap numbers used are 418 (port up) and 419 (port down). The link
LED is also toggled off during the loopback condition and back on when the
loopback condition goes away.

 The ability to enable and disable Telnet and WebView access to the switch
(via the General Configuration LM screen) has been added.

 Two new commands have been added to the Network Tools Local Management
screen, timed_reset and timed_soft_reset. These features allow the switch to
be automatically reset at a specified time interval.

 Fixed a problem (introduced in 4.06.05) in which the default Trunk Protocol
(PLAP) state of newly-created SmartTrunk would appear to be disabled (as
indicated by the trunk configuration Local Management screen), but would
actually be enabled.

 The interface speed for FTM backplane ports is now correctly reported as
2.1Gb/s

 The ctIfconnectiontype oid from Cabletron MIBII Extensions now returns the
correct value for the 6G306-06.

 Fixed an issue with the VHSIM2-A6DP that would cause the host platform to
reset under certain conditions.

 Fixed a problem where multicast priority on ATM PVCs was being handled
incorrectly.

 Fixed a problem in which WebView would not function correctly on modules
operating in "standalone" mode in a 6C105 chassis.

 Fixed a reset problem seen when polling ctUPS MIB objects on behalf of APC
700/1400 UPS models.

 Using the non_bridge_if_num command the device can now be configured to
report non-bridge ports, such as the SNMP host port with a MIB II ifIndex
value of either 0 or 9999. The default value is 0. Some third party network
management applications do not operate properly if a value of 0 is reported.

 Automatic End System/Alias Discovery
 - Switches maintain a directory of locally attached users. Supported
protocols learned in this release are:

 ENET

 Inet ARP

 Inet IP

 Inet UDP

 Inet OSPF

 IP RIP

 IP BGP

 IGRP

 ATalk RTMP

 ATalk ARP

 NetBIOS IPX

 IPX RIP

 IPX SAP

 IPX Type 20

 802.1q VLAN Tag

 Fixed a problem of Spanning Tree not working properly on ATM SVC ports.

 Added support for ATM VHSIM2 in SFS mode.

 Modified SFS dispatcher to log a debug message upon receipt of a frame whose
RX descriptor contains an invalid physical port number; the frame is then
discarded. Previously, a reset of the device would be initiated.

 Fixed a problem of interface statistics decrementing on gigabit Ethernet
ports.

 Fixed a problem on ATM PVC redundancy failover not working when operating in
SFS mode.

 Fixed a memory leak in RMON that would cause occasional "Out of Heap" resets.


----------------------------------------------------------------------------
 Known Restrictions and Limitations:
----------------------------------------------------------------------------
 Rate Limiting is not supported over ATM interfaces or WAN VC interfaces
(i.e., HSIM-W87/W85) in this release of firmware.

 NVRAM must be cleared on a 6H302-48 module after upgrading from version
4.02.10 to this release because of interface numbering changes between
firmware revisions.

 1st and 2nd generation modules (6X1XX & 6X2XX series) are restricted to
installation into slots 1-5 of the Matrix E7. In addition, if backplane
communication from these modules in slots 1-5 to 3rd generation modules
within slots 6 and 7 is desired, a 3rd generation module (6X3XX) is required
to be installed within the first 5 slots to perform the proxy function. See
Matrix E7 Proxy Function on page 5 of these notes.

 The Matrix E7 chassis does not support Distributed Chassis Management.

 If you are mixing 2nd and 3rd generation modules in a Matrix E7 while
running in SecureFast mode, no modules can be inserted in slots 6 and 7 of
the Matrix E7 chassis. If you are running all 3rd generation modules in the
Matrix E7 there are no slot restrictions.

 Port Redirect cannot be used to redirect frames between modules that use the
proxy function within the Matrix E7 for their connectivity. Specifically,
frames cannot be redirect from 1st or 2nd generation modules in slots 1-5 to
a 3rd generation module in slots 6-7, and vice-versa. Note that frames may be
redirected between any two 3rd generation modules in the chassis.

 Using local management to configure 100 Mb/s Full Duplex via "Save to all
ports" command on a module with a VHSIM-G6 or VHSIM-G02 installed, may cause
constant spanning tree topology changes to occur. This will only occur on
devices with a VHSIM-G6 or VHSIM-G02 installed. This issue can be avoided by
configuring the ports individually.

 BOOTP firmware download will not function over an 802.1Q trunk port.

 The Port Path Cost spanning tree parameter for ports configured as
"SmartTrunk" ports is not saved in non-volatile memory

 The Max Age parameter in spanning tree is not saved in non-volatile memory.

 Because of hardware limitations, undersize Ethernet frames received on
front-panel ports of 3rd generation modules will never be passed into the
switch. Consequently, such frames can never be captured by RMON or redirected
as error frames.

 During a Spanning Tree topology change, multiple Topology Change
Notifications (TCNs) are generated which can lead to increased convergence
times.

 Hot swapping a 3rd generation module into a lower numbered slot, than the
current Matrix E7 proxy module, will cause the proxy function to move to the
newly inserted module. This will cause a temporary loss of connectivity for
1st and 2nd generation modules communicating to slots 6 and 7. This does not
happen with removal of the current proxy module causing the proxy function to
move to the next 3rd generation module in a higher slot number.

 There can be power redundancy issues when installing 6H302-48 or 6H303-48
modules in a SmartSwitch 6000 chassis. The 6C205-1 power supply provides 60
Amps and the 6C205-3 provides 90 Amps. The recommended maximum using the
6C205-1 is two modules (6H30x-48) and four when using the 6C205-3. Please
contact Technical Support for assistance in determining which configurations
have power redundancy and those that do not. The redundancy LEDs on the power
supplies indicate the status of power redundancy. When both LEDs are green,
the chassis has redundant power. The Matrix E7 does not have these power
redundancy issues.

 User configured VrrpPort settings in Local Management will be lost after
downloading this image and resetting the switch. The settings must be
manually reentered.

 By default only one port is active on the VHSIM-G6 and 6H262-18. To activate
the second port you must use the "gigabit_port_mode" option in the Network
Tools Local Management screen. When the second port is activated, the switch
will reset, and the contents of NVRAM with the exception of IP Address and
Subnet Mask will be lost.

 If the device is running boot code version 2.01.00 or lower and power-up
sequence is interrupted, or if optional hardware is installed or removed, the
device may run an extended diagnostics sequence. During the extended
diagnostics, the CPU LED color will be solid amber. This sequence may take
between five to forty minutes to complete depending on the hardware model.

 Opening multiple active telnet sessions to a single module to access local
management may cause the module to reset. This will be corrected in a future
firmware release.

 The SmartSwitch host (SNMP management) port must not be configured as an
802.1Q Trunk Port. If configured as an 802.1Q Trunk Port the device may
reset. If the user wishes to make the host port accessible from some or all
802.1Q VLANs, then the 802.1D Trunk Port option must be used.

 If an optional HSIM or VHSIM is installed or removed, the device will
restore all configuration settings to the factory defaults. The only customer
configuration settings that will be saved are the IP Address, Subnet Mask and
the Operational Mode.

 When upgrading from firmware version 2.00.17 to this version of firmware,
the speed and duplex settings may not properly restored from NVRAM. In the
event this occurs, you will need to reconfigure the speed and duplex settings
if something other than the default setting is required. This issue only
affects devices running firmware version 2.00.17.

 If HSIM-F6 ports are configured to operate in full duplex mode, the Local
Management Ring Map screen may not operate correctly.

 The HSIM-F6 should not be configured as an 802.1Q "trunk" port.

 The HSIM-F6 does not support 802.1Q tagged frames which exceed the maximum
Ethernet frame length (1522 bytes). Frames larger than 1522 bytes will be
discarded by the switch.

 The HSIM-F6 was developed in the early stages of the 802.1Q standards
process. The Ethernet & FDDI translation and frame tagging rules were not
fully defined at development time. Changes made during the standardization
process, result in the HSIM-F6 using a proprietary method of frame tagging on
FDDI. The implementation used on the HSIM-F6 is fully functional between
other HSIM-F6 devices.

 The User configurable parameters available in the IGMP Local Management
Screen should be set to match the parameters on the device acting as the IGMP
Querier. The SmartSwitch 2000/6000 will not act as the IGMP Querier in this
version of firmware.

 Runtime firmware downloads will not work if the TFTP server is using one of
the following RFC1918 reserved addresses:10.0.0.0, 172.16.0.0, 192.168.0.0

 Distributed Chassis Manager is not supported in SecureFast mode.

 SmartTrunking is not supported over ATM in this release of firmware.

 When using 802.1Q VLANs with multiple LECs, Spanning Tree Algorithm must be
disabled on ATM. This can be done via the Local Management "Network Tools"
option using the atm_stp_state command.

 MPOA is not supported in this version of firmware.

 ATM Lane Services are not supported on the VHSIM-A6DP in this release of
firmware.

 The SmartSwitch cannot perform Layer 3/4 Classification on frames received
by the HSIM-A6DP or VHSIM-A6DP. This means that inbound ATM frames cannot be
classified into an 802.1Q VLAN based on the received frames protocol type.
Also, inbound ATM frames cannot be assigned an 802.1p Priority value based on
a frames protocol type, Layer 3 or Layer 4 information.

 Each ATM LEC assigned to an 802.1Q VLAN must be assigned a unique Filtering
Database Identifier (FID)

 GVRP must be disabled on the following types of interfaces: 802.1Q Trunk
Ports, 802.1d Trunk Ports, SmartTrunk Ports and all ATM ports.

 802.1Q VLAN tagging is not supported on the VHSIM-A6DP.

 All modules installed in a Matrix E7 must have consistent spanning tree
settings i.e. all modules configured for spanning tree enabled or all modules
configured for spanning tree disabled. This restriction does not apply to
individual ports just the entire module. Also the same Spanning Tree
algorithm (IEEE or DEC) must be used for all modules installed in a Matrix E7.

 Backplane ports must not be administratively disabled on modules installed
in a Matrix E7, when there is a device providing a Proxy bridge service in
the chassis. If backplane ports are disabled unreliable Spanning Tree
operation could occur. For details on Proxy Bridge refer to the "Matrix E7
Proxy Function" in the Installation and Configuration Notes section of this
document.

 A bootp firmware image download should not performed to a device that is
providing a proxy bridge service. If a download is performed on the proxy
device, the proxy will stop bridging, and the other modules in the chassis
will not assume the proxy function. An online (runtime) download can be
performed on any module including the proxy without affecting proxy function.

 When downloading a configuration file to a switch, the file used must have
been originally uploaded from the same SmartSwitch type. (i.e. A file from a
6H202-24 can only be downloaded to a 6H202-24.)

 Cannot fully populate the DeltaAlias Table in SecureFast after clearing the
table.

 Any other problems than those listed above should be reported to our
Technical Support Staff.


----------------------------------------------------------------------------
 Compliance support:
----------------------------------------------------------------------------

 Compliance Level     Compliant
 Year 2000            YES

 Known Anomalies: None.

 IETF Standards MIB Support:

 RFC No.      Title
 RFC 1190     Path MTU Discovery
 RFC 1213     MIB II
 RFC 1354     FIB
 RFC 1493     Bridge MIB
 RFC 1573     Evolution of MIBII Interfaces
 RFC 1595     SONET MIB
 RFC 2515     AToM MIB
 RFC 1757     RMON MIB


----------------------------------------------------------------------------
 Cabletron Private Enterprise MIB Support:
----------------------------------------------------------------------------

                          Title and Version No.

 Actions-mib version      ctmib2-ext-mib version   Sys-res-mib version 1.00.02
 1.03.01                  1.05.01

 Container mib version    Ctdownload version       Ctpic-mib version 1.02.01
 1.02.00                  1.06.01

 Ctbridge-mib version     Fastethernet-mib         Trap-mib version 1.01.03
 1.06.01                  version 1.02.01

 Ctenvir-mib version      Ctbroadcast-mib version  Ctsmt-mib version 1.03.02
 1.05.01                  1.00.01

 ctip-mib version 1.02.01 Cttranslat-mib version   Ctatm-mib version 1.03.00
                          1.01.06

 Community-mib version    Ctrouter-mib version     CtEthernetParameters ver
 1.02.02                  1.01.00                  1.00.00

 Ctvlan-ext-mib version   ctups-mib version        CtPriority-mib version
 1.03.01                  1.03.00                  1.00.00

 CtIFRemap2-mib ver       CtTxQarb-mib ver 1.00.01 Ct-priority-classify-mib
 2.00.02                                           ver 1.00.00

 Ct-vlan-classify-mib     Ctwebview-mib Version    CtRatePolicing-mib version
 version 1.00.00          1.00.00                  1.00.00

 ctron-cdp-mib version    Ctron-oids-mib version   ctron-alias-mib version
 1.00.03                  1.19.14                  1.00.00

 ct-policy-mib version
 1.00.00

 ENTERASYS Private Enterprise MIB Support:

 Title and Version No.

 Enterasys-oids-mib version 1.00.00

 Cabletron and Enterasys Private Enterprise MIBs are available in ASN.1
format from the Enterasys web site at:

 http://www.enterasys.com/support/mibs . Indexed MIB documentation is also
available.

 SNMP Trap Support:

 RFC No.     Title
 1157        WARM START
             LINK UP
             LINK DOWN
             AUTHENTICATION FAILURE
 1493        NEW ROOT
             TOPOLOGY CHANGE


----------------------------------------------------------------------------
 Cabletron Private Enterprise trap Support:
----------------------------------------------------------------------------

 Title
 0x1A2 interfacePortLinkUp             0x40D fddiMACDuplicateMACAddress
 0x1A3 interfacePortLinkDown           0x44E aPCLineFailRecovery
 0x3EB ctBroadcastThresholdReached     0x450 aPCLowBatteryRecovery
 0x4B0 contLogicalChangesTrap          0x451 aPCAbnormalCondition
 0x4B1 contPhysicalChangesTrap         0x708 wgPsInstalled
 0x44F aPCLowBattery                   0x709 wgPsRemoved
 0x542 aPCAbnormConditionRecovery      0x70A wgPsNormal
 0x453 aPCShuttingDown                 0x70B wgPsFail
 0x44D aPCLineFail                     0x70C wgPsRedundant
 0x400 fddiPortConnectStateChange      0x70D wgPsNotRedundant
 0x403 fddiPortAction                  0x70E wgBoardInserted
 0x404 fddiPortLerAlarm                0x70F wgBoardRemoved
 0x408 fddiMACRMTState                 0x2EE0 activePortInATMRedundancyFailed
 0x409 fddiMACCurrentPath              0x2EE1 aTMRedundantPortActivated
 0x40A fddi SMTCFstate                 0x2EE2 aTMRedundanctPortTestFailed
 0x40B fddiRingTopology                0x2EE3 aTMRedundPrimaryPortSkipped
 0x40C fddiMACFrameErrorRatio          0x2F12 atmLecStatus

                  SecureFastTM Virtual Networking Technology
                           Firmware Version 2.00.27
                                 December 2000


----------------------------------------------------------------------------
 INTRODUCTION:
----------------------------------------------------------------------------
 This document provides specific information pertaining to firmware version
2.00.27 of Cabletrons SecureFast TM Virtual Networking Technology. For
information regarding support of this technology on individual Cabletron
products, please refer to the release notes for those products.

 It is recommended that one thoroughly review this release note prior to the
installation or upgrade of this product.


----------------------------------------------------------------------------
 Firmware Specification:
----------------------------------------------------------------------------

 Status               Version No.     Type         Release Date
 Current Version      2.00.27         Customer     December 2000
 Previous Version     2.00.22         Customer     October 2000
 Previous Version     2.00.12         Customer     February 2000
 Previous Version     1.09.12         Customer     November 1999
 Previous Version     1.09.10         Customer     October 1999
 Previous Version     1.09.04         Customer     August 1999
 Previous Version     1.08.26         Customer     May 1999
 Previous Version     1.09.02         Customer     March 1999
 Previous Version     1.08.20         Customer     February 1999
 Previous Version     1.08.15         Customer     October 1998
 Previous Version     1.07.23         Customer     September 1998
 Previous Version     1.07.14         Customer     April 1998
 Previous Version     1.07.10         Customer     February 1998
 Previous Version     1.06.13         Customer     December 1997
 Previous Version     1.05.03         Customer     April 1997


----------------------------------------------------------------------------
 HARDware compatibility:
----------------------------------------------------------------------------
 Please reference individual product release notes for supported hardware
revisions or to verify if there is a hardware revision limitation.


----------------------------------------------------------------------------
 BootPROM compatibility:
----------------------------------------------------------------------------
 Please reference individual product release notes for supported BootPROM
versions or to verify the qualifying revisions.


----------------------------------------------------------------------------
 Network Management Software Support:
----------------------------------------------------------------------------

 NMS Platform                                       Vers   Module No.
                                                    ion
                                                    No.
 SPECTRUM VLAN Manager                              V2.0   Rev. 0 (or greater)
 SPECTRUM 5.0 Rev. 1 with Integrated VLAN Manager   5.0    Rev.1

 If you install this image, you may not have control of all of the latest
features of this product until the next version(s) of network management
software. Please review the software release notes for your specific network
management platform for details.


----------------------------------------------------------------------------
 SUPPORTED FUNCTIONALITY:
----------------------------------------------------------------------------
 The following lists and highlights the features from previous versions of
SecureFast that are supported by this release.

 Features                                                              Support

 Automatic Membership Registration (AMR) allows SPECTRUM VLAN Manager  Yes
 to recognize non-unicast packets based upon Layer 3 information and
 automatically assign the source user to protocol-specific VLANs.

 IP Multicast allows for efficient and controllable use of IP          Yes
 Multicast services within SmartSwitch based networks. IGMP versions
 1 and 2.

 Active Mesh Topologies supported                                      Yes

 Inter-VLAN communication with or without a traditional router         Yes

 Complete user mobility A user that is statically assigned to a VLAN   Yes
 will retain the mapping during the process of a move from one port
 to another or from one SecureFast switch to another.

 Complete multi-protocol connection-oriented switching services with   Yes
 enhanced resolution services for IP (i.e., IP ARP, AppleTalk AARP)

 Broadcast containment via tag-based flooding of non-resolvable        Yes
 broadcasts. (i.e., IPX SAP, IP RIP)

 Automatic End System/Alias Discovery - SecureFast™ switches     Yes
 maintain a directory of locally attached users. The directory
 information

 Includes users Network layer address(es), MAC address, switch and
 switch port location as well

 as protocol stack(s) used by each user.

 Automatic Switch Adjacency Discovery - SecureFast™ switches     Yes
 automatically learn the topology of the switch fabric.

 Automatic Call Re-routing upon link or switch failure as well as
 user moves

 Best Path Determination based on summarization of link metrics using
 Virtual Link State

 Protocol (VLSP)

 Connection Load balancing over equal cost paths                       Yes

 Quick Topology Convergence - Electrical loss detection for Ethernet   Yes
 and Fast Ethernet network links - SMT loss detection for FDDI
 network links

 VLAN Policy (Open/Secure) - Open Inter-VLAN communications via Call   Yes
 Processing and address/VLAN resolution - Secure Inter-VLAN
 communications via traditional router only

 Features                                                              Support

 Unidirectional or Bi-directional calls may be tapped to any switch    Yes
 within the domain by selecting the network analyzer probe's MAC
 address or switch port through the SPECTRUM VLAN Manager.

 Multiple VLAN membership per user and per port                        Yes

 VLAN membership inheritance per port for users without any previous
 VLAN association

 VLAN locking per port - When a VLAN is locked to a port, the default
 VLAN for the port becomes the only VLAN mapping that can be
 associated with the port. This VLAN mapping overrides any and all
 VLAN mappings associated with the user when the user plugs into this
 port type.

 Enable/Disable Tag-based Flooding per VLAN                            Yes

 Router Port Configuration - Disable Learning of Alias Addresses (MAC  Yes
 and Network Layer Addresses) Per Port

 Provisioning for source to broadcast/multicast/unicast connections    Yes

 Broadcast/Unicast Suppression for Connection Attempts made to         Yes
 Unknown/Invalid Destination addresses

 SecureFast-specific CLI Commands via local management or telnet       Yes
 session.

 Ability to specify remote IP networks and the optimal router through  Yes
 which the IP networks are reachable.

 Ability to specify internal IP networks and a SecureFast Default      Yes
 Gateway per domain.

 Layer 3 address mobility: As Layer 3 addresses are reused by          Yes
 different users, the SecureFast switches will automatically purge
 the old Layer 3-to-MAC address binding from the SecureFast directory
 and dynamically learn the new Layer 3-to-MAC address binding for the
 new user. This feature is particularly useful in a DHCP environment
 where IP address reuse may occur frequently.

 SecureFast switches protect themselves against a misconfiguration     Yes
 where two ports on the same switch are looped. Two ports on the same
 switch that are connected via a jumper cable will automatically
 transition to "standby" ports, eliminating all traffic from both
 ports.

 Support for three or more (up to 14) SecureFast switches to be        Yes
 attached to a shared media segment.

 Support for allowing a network administrator to specify remote IP     Yes
 networks as well as the optimal router through which these IP
 networks are reachable. This information will be utilized by the
 SecureFast switches during their resolve process and will ultimately
 minimize the amount of flood traffic. Additionally, a network
 administrator will be allowed to specify internal IP networks (IP
 networks within a SecureFast domain) and a SecureFast Default
 Gateway. This information will also be utilized by the SecureFast
 switches during the resolve process. Connection attempts for remote
 hosts (hosts attached to a remote IP network behind a traditional
 router) will result in a connection being established to the
 specified SecureFast Default Gateway.

 SecureFast-specific CLI commands, accessible via the Network Tools    Yes
 utility of a SecureFast switch, is supported. The
 SecureFast-specific CLI commands allow a network administrator to
 view configuration parameters, view SecureFast directory
 information, tap a call, enter a resolve entry into the directory
 and search for a connection either remotely via a telnet session or
 locally via a console port. Details on SecureFast-specific CLI
 commands are documented within the Local Management Network Tools
 guide included on the SPECTRUM VLAN Manager 1.9 Rev0 CD.

 Advanced VLAN Policy - Allows VLAN policy relationships to be         Yes
 controlled on a per VLAN pair basis. Provides granular control over
 a single VLAN by offering the ability to set inter-VLAN connection
 and flooding policies per VLAN, as opposed to globally.

 IP Multicast Services - Allows for IP Multicast support through IGMP  Yes
 "snooping" or detection of IGMP v1 and v2 messages. Through IGMP
 snooping, a source rooted multicast distribution tree is dynamically
 created, ensuring that multicast transmissions are distributed to
 only those hosts requesting such services.

 Restrict Port - Allows for the configuration of ports on a switch to  Yes
 be reserved for specified MAC addresses. A user attempting to
 connect to a "restricted port" with a MAC address not configured for
 this port will be denied access to the network.

 Restrict User - Allows for the configuration of binding the alias     Yes
 (Layer 3 address, host name, VLAN membership) and MAC address of a
 user to a specific port. Protects critical resources such as routers
 and servers by limiting another user or device from utilizing known
 Layer 3 addresses of routers or servers. Also restricts Layer 2/3
 mobility for users within a VLAN to predefined switch ports on a
 network.

 Dynamic Uplink Switch Support - Allows for scalability beyond         Yes
 current domain size limitations by having VLSP automatically
 disabled on select periphery switches, yet still be involved in
 other SmartNetwork Services by assigning a flood path into the VLSP
 core.

 DHCP Relay Agent - Allows for the definition of a logical address     Yes
 scope on a single DHCP server per switch and the ability to
 associate VLANs to this scope. Allows VLANs to dynamically represent
 logical subnets and allows administrators to point new users
 entering a network to a certain scope. This is accomplished by
 defining the DHCP attribute per VLAN and making that VLAN the
 default or inherited VLAN for a certain port.

 AppleTalk Island Support- This feature scopes AppleTalk floods to an  Yes
 Island regardless of geographic location.

 AppleTalk islands are available when AppleTalk AMR is enabled. The
 default VLAN for islands is the AppleTalk AMR VLAN 0x00000201

 Dynamic Apple Talk Router Address Discovery - Allows for the dynamic  Yes
 learning and discovery of router AppleTalk addresses via inspection
 of RTMP packets.

 Redundant Access - Allows for redundant access into a VLSP domain     Yes
 for shared network segments. Allows critical devices located on
 shared network segments to have multiple connections from the shared
 network segment to a SecureFast fabric without transitioning the
 shared network segment into a network link.

 CLI Network Tools enhancements - Allows for the ability to enable or  Yes
 disable Protocol Control and Destination/Source Blocker
 functionality through traditional and easy to use CLI commands.

 Allows the user to clear the Source Block Table (sblock).

 Allows the user to clear the Flood Suppress Table (floodsuppress).

 Allows the user to Set priority of Bridge ST via the CLI.

 Improved readability of VLAN name in "vlan list".

 Changed portcli to correctly report the physical port number and
 changed "slot" to report the neighbor INB slot rather than the slot
 this board is in.

 IP Address Learning - Allows for the suppression of Alias learning    Yes
 for IP users configured with a remote network (external IP) address.
 Also allows networks to be set as invalid to prohibit users with
 incorrect IP addresses to communicate.

 Flood Optimization - Adds an attribute called VLAN ID to VLAN         Yes
 properties to improve overall flood performance. Allows for the
 assignment of an ID to a VLAN, defining whether a VLAN flood will
 need to be processed by the switch host or not. VLAN floods are only
 processed by those hosts requesting such services. Option to flood
 AppleTalk ARP probe across VLANs. Default mode is to scope to VLAN.

 Protocol Control - Allows the network administrator to suppress       Yes
 certain protocols and/or associated frame types from being utilized
 on a per switch or switch domain basis. The following protocols may
 be suppressed:

 IPX

 AppleTalk

 NetBEUI

 NetBIOS - IP

 NetBIOS IPX

 BPDU

 All applicable frame types

 Statistics are kept by recording the number of packets accepted and   Yes
 dropped for each protocol. This includes IPX Raw, IPX on SNAP, IPX
 on 802.2, IPX on Ethernet II, IP-NetBIOS, IPX-NetBIOS, NetBEUI on
 802.2, AppleTalk DDP on SNAP, AppleTalk AARP on SNAP, Spanning Tree,
 OSPF Broadcast, OSPF Multicast, IGRP, RIP, RIP II, and AppleTalk
 RTMP. Additionally, a viewable table is created that identifies
 users that attempt to transmit prohibited protocols, allowing
 network administrators to isolate and identify users who break these
 rules.

 Automatic Membership Registration (AMR) - Allows for dynamic          Yes
 configuration of VLANs based upon the following protocol criteria:

 IP network

 IPX by network number and frame type

 NetBEUI

 NetBIOS-IP

 NetBIOS-IPX by network number

 DECnet

 AppleTalk

 Banyan VINES

 BPDU

 Provisioned Redundant Access - Provisioned RA is a specialized        Yes
 version of RA. Rather than depending on T1 (front panel) RA hellos
 to learn of other RA ports on the shared segment, the neighbor
 information will be provisioned (that is manually entered via MIBs
 or VLAN Manager).

 SNMP Traps - Allows for SNMP traps to be sent by the switch upon      Yes
 certain events:

 o SNMP Trap #1400 - New User -> A new Mac Address has been detected
 on this switch.

 o SNMP Trap #1401 - Directory Violation -> Currently includes 7
 different violation types. Each has its own description, cause, and
 action. All these may mean that an invalid user is trying to gain
 access into the network

 o SNMP Trap #1402 - Source Blocked -> A user (MAC address) has
 surpassed the Source Blocker thresholds and is being blocked from
 sending traffic on the network.

 o SNMP Trap #1403 - Flood Suppressed -> A destination address has
 been unresolvable past the thresholds, and is now being flood
 suppressed (only 1 per x seconds will pass).

 o SNMP Trap #1404 - Port to Standby -> A port has entered standby.
 There are different standby states: STAND_BY (Port has been manually
 set to standby or End Station Port (ESP) has detected a neighbor),
 STAND_BY_FCL (One way neighbor, incompatible neighbor, incompatible
 hello, etc. One way neighbors are normally during switch resets for
 a second or two), STAND_BY_LOOPED (Self-originated Hello seen on
 port), STAND_BY_RA (Redundant Access Port is standby/backup).

 o SNMP Trap #1405 - Port from Standby -> A port, which was in a
 standby state, is not anymore. Most common scenario is either a
 one-way neighbor situation is gone, or a standby RA port is now
 primary.

 o SNMP Trap# 1406- AgeCnt -> The Connection table on the switch was
 near capacity (95%) and ran an Age Pass to remove connections. Note
 - 1 Age Pass equals removing 100 connections.

 o SNMP Trap# 1407- ChgCnt -> The Flood/Control Channel has changed
 on the switch. May be due to adding/removing switches or links. Trap
 not sent for first 5 minutes of Switch uptime.

 o SNMP Trap# 1408- Found Neighbor -> A new SecureFast Neighbor was
 found/added.

 o SNMP Trap# 1409- Lost Neighbor -> A SecureFast Neighbor was
 lost/removed.

 o SNMP Trap# 1410- VLAN Mg. Agent IP ->Vlan System Table detected a
 change in the Vlan Manager IP. The Vlan Manager inserts its IP
 Address into the Vlan System Table. A trap is sent if the IP changes
 to/from a non-zero IP Address.

 o SNMP Trap #1411 No Source VLANs -> Takes place when the source
 user is not mapped to a VLAN

 o SNMP Trap #1412 No Destination VLANs -> Takes place when the
 destination user is not mapped to a VLAN

 o SNMP Trap #1413 No Source VLANs Enabled -> Takes place when the
 source VLAN is disabled

 o SNMP Trap #1414 No Destination VLANs Enabled -> Takes place when
 the destination VLAN is disabled

 o SNMP Trap #1415 No Common Secure VLAN -> Takes place when the
 source and destination vlans don't share a common secure VLAN. This
 will result in the packet being flooded - need a Router to route
 between Secure VLANs.

 o SNMP Trap #1416 Inc VLAN User Count -> Takes place when a user is
 mapped to a VLAN. This is User configurable - the default is to send
 this trap for every VLAN. Through the VlanTrapAPI, this can be
 configured to send the trap for ONE specific VLAN.

 o SNMP Trap #1417 Dec VLAN User Count -> Takes place when a user is
 unmapped from a VLAN. This is User configurable - the default is to
 send this trap for every VLAN. Through the VlanTrapAPI, this can be
 configured to send the trap for ONE specific VLAN.

 o SNMP Trap #1418 VRRP Primary Resign -> Takes place when a VRRP
 Router sends out a VRRP Hello Packet with Priority of 0 (Resign).

 o SNMP Trap #1419 VRRP Primary Aged -> Takes place when the Primary
 VRRP Route is 'Aged' via the ingress SecureFast Switch.

 o SNMP Trap #1420 VRRP Secondary Up -> Takes place when Backup VRRP
 Router becomes Primary.

 o SNMP Trap #1421 HSRP Primary Resign -> Takes place when a HSRP
 Router sends out a HSRP Hello Packet with Priority of 0 (Resign).

 SNMP Trap #1422 HSRP Secondary Up -> Takes place when Backup HSRP
 Router becomes Primary.

 DHCP Enhancements- The option is now available to send DHCP replies   Yes
 directly to the intended DHCP client. The entire SecureFast fabric
 must have this feature enabled in order to function properly. This
 applies to BOOTP packets as well as DHCP packets.

 DHCP Islands- DHCP Islands are now supported. This new feature        Yes
 supports the ability to administer geographically based DHCP
 islands. This applies to BOOTP packets as well as DHCP packets. The
 entire SecureFast fabric must have this feature enabled in order to
 function properly. The DHCP Islands feature is similar to the DHCP
 Server feature and it provides geographical granularity.

 DHCP Server VLAN - Limits the flood scope of DHCP request packets to  Yes
 only DHCP Servers

 statically mapped to that VLAN.

 HSRP Support - With IP Multicast enabled, establishes a multicast     Yes
 connection between the routers so that the inter-router messages no
 longer rely on the flood channel.

 Reap connections if MAC address is in Source Blocker.                 Yes

 Vflood Support The default behavior is for SecureFast to learn the    Yes
 AppleTalk alias address on an AppleTalk ARP probe. This discovery
 step can increase the time it takes for the switch to flood the
 probe. Vflood support, when enabled throughout the switch fabric,
 reduces the time to flood by not discovering the source on the probe
 request. The probe is then flooded across all VLANs. In addition,
 when the switch receives the probe reply from the destination,
 SecureFast will not perform an inter-switch resolve or connection
 setup but rather flood the reply to all ports.

 VRRP Call Processor Support- Creates a connection between the         Yes
 routers running VRRP so that the VRRP packets are not dependent on
 the flood channel.

 VRRP Support - With IP Multicast enabled, cleans up the Directory     Yes
 after a router has transitioned between primary and standby.

 Improved IP Multicast setup time- Creates connections along Control   Yes
 Channel until the traffic exceeds a certain threshold (query-high
 limit, query-low limit). At that point, connections are made based
 on VLSP. This feature is disabled by default. The Entire SecureFast
 fabric needs to enable this feature in order for it to function
 properly.

 IP Multicast Policy Checking- There are now two modes of policy       Yes
 checking for IP Multicast:

 1. no check (default) 2. check only the default VLAN of the port

 SecureFast Violation Table Addition- If a protocol is disabled from   Yes
 running in the SecureFast domain and user A attempts to talk using
 that protocol, the switch will intercept and drop the packet. It
 will then add an entry for user A and what protocol was used (but no
 Layer 3 information) to the Violation Table. The switch maintains
 counters for each packet that is dropped per protocol.

 Persistent IP- A delay timer has been added to save the modules IP    Yes
 address when NVRAM is cleared.

 Tier 2 Support - Allows extending the Uplink Switching model one      Yes
 more tier. In order to utilize this functionality, the switch needs
 to be provisioned as Tier 2.


----------------------------------------------------------------------------
 Installation and Configuration Notes:
----------------------------------------------------------------------------
 In general, SecureFast Virtual Networking Technology is a set of features
that are available within a version of firmware. If you would like to upgrade
an existing product to support the above features which are available to the
product, please follow the TFTP download instructions that are included with
your firmware image upgrade kit. TFTP download instructions are also
available on the Cabletron Systems Support Web Site at:

 http://www.cabletron.com/support/techtips/tk0020-9.html


----------------------------------------------------------------------------
 FIrmware Changes and Enhancements:
----------------------------------------------------------------------------
 The following is a list of major firmware changes and enhancements for the
2.00.27 release. These are in addition to the existing features listed in the

----------------------------------------------------------------------------
 Supported Functionality section.:
----------------------------------------------------------------------------

 A check has been added to insure that the VST/VLSP component can not be
enabled when the uplink facility is enabled.

 A problem was introduced in SecureFast 2.0.12; if you administratively
provisioned a multicast connection through the McCnxTblApi, it could not be
deleted unless you cleared NVRAM.

 Made a fix when adding an IP Multicast Filter connection.

 Update so connections with the Source MAC Address equal to the Destination
MAC Address get a CRITICAL message instead of an ERROR message in the
SecureFast Event Log.

 Don't automatically Age the OSPF Directory/Connections based on the "OSPF
DeadTimer". OSPF will now add BOTH 224.0.0.5 and 224.0.0.6 IP Multicast
Groups when it sees a packet from either 224.0.0.5 or 224.0.0.6.

 Refresh the IpMcRib Entries Age every time we get a router packet.
SecureFast was aging out OSPF/HSRP/VRRP (non-provisioned) entries (default
age time is 50 minutes).

 Fixed SFPSTrap - potential for not saving persistent information (TRAP
Disables).

 Broken in SecureFast 2.00.22. SecureFast would only subnet validate an IP
Multicast packet. A fix has been made to also subnet validate an IP packet.

 VRRP Timer fix to prevent premature aging. Set the default VRRP Ageout Timer
to (3*SendFrequency)+1 rather than just (3*SendFrequency). This is the
default setting. The VRRP Ageout Timer can be manually configured.

 When SecureFast receives an AppleTalk ARP with the destination address in
the startup range 65280.0 through 65534.255, it will no longer try to resolve
(SecureFast does not learn these AppleTalk addresses). SecureFast will go
directly to the flood step.

 EIGRP fix to prevent the EIGRP IP multicast group (224.0.0.10) from being
learned as "local" on ports when IP multicast is enabled.


----------------------------------------------------------------------------
 Known Restrictions and Limitations:
----------------------------------------------------------------------------

 Network Configuration
 SecureFast switches attached to shared network links are supported in
limited configurations of up to (14) SecureFast switches.

 To optimize performance and to utilize full duplex capabilities, all
SecureFast™ VLAN switches should be interconnected via point-to-point
inter-switch links.

 It is recommended not to exceed 7 switch hops from the root switch.

 Users may not be attached to inter-switch links without using the Redundant
Access feature.

 A total of 1024 VLANs may be supported by a SecureFast™ VLAN domain. A
SecureFast VLAN domain terminates at a traditional router boundary.

 A single user (MAC address) may be a member of up to 8 static VLANs, not
including AMR VLANs.

 This release supports the following module configurations per SmartSwitch
9000 chassis:

 All SmartSwitch 9000 INB-based modules configured for SecureFast mode.

 One SmartSwitch 9000 INB-based module configured for SecureFast mode and
multiple SmartSwitch 9000 FNB-based modules configured for Traditional
Bridging mode.

 All SmartSwitch 9000 INB-based modules configured for SecureFast mode and
multiple FNB-based modules configured for Traditional Bridging mode.

 The following SmartSwitch 9000 chassis configurations are not supported in
this release: Two or more SmartSwitch 9000 INB-based modules configured for
SecureFast™ mode and one or more SmartSwitch 9000 INB-based modules
configured for Traditional Bridging mode. One SmartSwitch 9000 INB-based
module configured for SecureFast mode and multiple SmartSwitch 9000 INB-
based modules configured for Traditional Bridging mode. The work around for
this configuration is to disable the INB on each traditional mode module and
connect one front panel port of the traditional mode module to one of the
front panel ports of the SecureFast mode module.

 A device with multiple interfaces that share a common MAC address is
supported in this release when the Duplicate MAC address support is enabled.

 It is recommended that shared segments of less than 500 users be attached to
a single switch port. This limitation is dependent on the specific traffic
patterns and protocols used by end stations on the shared segment. Optimal
performance is achieved by attaching a single user to a single switch port.

 Layer 3 Mobility
 Any multi-interface device routing IPX (type 20) packets may inadvertently
be associated with incorrect NetBIOS names. Solution: Toggle ports to which
the multi-interface device is attached, to router ports. Layer 3 learning is
disabled by default for Router ports.

 Automatic Membership Registration (AMR)
 To reach quiet users, if the user is performing an ARP request and it is
unresolvable, the switch will flood out one packet for every 20 unresolved
hits. These go to all port(s) that do not have any IP subnet AMR VLANs mapped
to it. Note that this behavior is for ARP requests only. If this is occurring
and the user is being Flood Suppressed, the normal leaking of once every
minute will be increased to once every two minutes.

 IP-Subnet & NetBIOS Automatic Membership Registration (AMR): When IP Subnet
and NetBIOS AMR configuration parameters are enabled, IP NetBIOS flood
packets are delivered to all ports where IP-NetBIOS users have been
discovered regardless of subnet.

 If both the IP-subnet and the NetBIOS rules are used simultaneously, flooded
IP-NetBIOS packets may not be flooded to the desired flood group. Since the
IP-NetBIOS packet is processed by the call processing stack, it reaches the
IP call processor before reaching the IP-NetBIOS call processor. Because the
IP-NetBIOS call processor is last, it gets the final say as to which VLAN the
packet will be flooded. The "IP-NetBIOS" VLAN is simply a VLAN and not a
template for VLANs based on IP-Subnet, and therefore, when an IP-NetBIOS
packet is flooded, it may violate the IP-Subnet rule. The following is a
sample scenario: Both the IP-Subnet and NetBIOS rules are enabled. The
IP-Subnet AMR mask is 255.255.255.0 Node A (134.141.xx.3) transmits an
IP-NetBIOS packet and is joined to both the 134.141.xx.0 and IP-NetBIOS
VLANs. Node B (134.141.xy.1) transmits an IP-NetBIOS packet that needs to be
flooded. The IP-NetBIOS call processor determines that the packet should be
flooded to the IP-NetBIOS VLAN, which means that the packet would also flood
to the port where node A resides (a different subnet).

 IPX RIP/SAP Automatic Membership Registration (AMR) - IPX-NetBIOS_00000000
VLAN When Windows for Workgroups 3.11 (WFW311) clients use IPX-NetBIOS for
sharing resources, they do not follow the standard IPX procedure for
determining their IPX network number. Instead of issuing a SAP GNS (Get Next
Server) request, the client simply uses a network number of 0x00000000 until
it hears an IPX RIP advertisement. It will then look at the source network
number used in the RIP packet and start using it as its own network number.
If the client never receives an IPX RIP advertisement, it will continue to
use the zero network number forever. If the IPX RIP/SAP AMR rule is being
used along with the NetBIOS AMR rule, the IPX RIPs form servers/routers will
be auto-segmented and therefore not sent to the WFW311 client. The WFW311
client will continue to use the zero IPX network number for all it's
IPX-NetBIOS packet transmissions. This will essentially cut off the WFW311
client from all other IPX-NetBIOS clients that are correctly using non-zero
network numbers.

 To remedy this, IPX RIP packets are flooded to the "IPX-NetBIOS_00000000"
VLAN as well as the "IPX RIP/SAP__" VLAN, allowing the
WFW311 client to receive a RIP response advertisement. When the WFW311 client
receives the RIP advertisement, it changes it's IPX network number to a
valid, non-zero number and starts sending packets using the new number. When
the SecureFast switch sees that the WFW311 client is no longer using a zero
network number, it removes the node from the "IPX-NetBIOS_00000000" VLAN and
adds it to the "IPX-NetBIOS_,netNumber>" VLAN. Furthermore, the IPX RIP
advertisements are no longer sent to the WFW311 client because it is no
longer a member of the "IPX-NetBIOS_00000000" VLAN.

 IP Multicast
 The Time To Live (TTL) parameter within the Multicast feature can no longer
be changed. This reduces unnecessary configuration and allows the switch
fabric to rely on any attached multicast routers to handle TTL.

 Potential switch reset problem if you provision an IP Multicast connection
through the IP Multicast Connection API before IP Multicast is ever enabled
on the switch.

 Call Tap
 A call cannot be tapped to more than one out port simultaneously.

 A call cannot be tapped to a port that is already enabled as an out port for
that call.

 A tapped call will be lost if either the source or destination user of that
call is moved.

 Solution: To re-establish the tap, the tap for the original connection must
be released and re-tapped for the new connection.

 When a call is tapped and the connection is released or ages out, the tap
will no longer function and may appear as a tapped call in the Connection
Table.

 Solution: To re-establish the tap, the tap for the original connection must
be released and the new connection must be tapped.

 Restrict User
 If new user thrashing is occurring, or a user is continually being learned
on different switches, the user cannot be restricted to a switch. An example
of this is when two or more users are configured with the same IP address.

 Redundant Access
 Redundant Access supports two switches on a Redundant Access link. (A
Redundant Access switch port can only have one Redundant Access neighbor) The
Primary and Standby Redundant Access ports of a single Redundant Access
connection cannot be located on the same switch. The maximum number of
Redundant Access links between any two switches is 20. For example:

 A 9E423-36 (switch 1) can have up to 20 ports configured for Redundant
Access with switch 2. The remaining 16 ports could then be configured for
Redundant Access with switch 3.

                                    [Image]

 Note: If a switch detects a 21st Redundant Access adjacency to any given
switch, it will refuse the configuration and keep that port in RA_HALTED mode
(which is essentially STANDBY). If a switch resets with over 20 Redundant
Access ports configured, you may get less than the 20 Redundant Access links
active once the switch returns.

 FDDI configurations are also supported using Redundant Access. On the 6000
and 2000 platforms, Redundant Access can be configured on an actual FDDI
Ring. On the 9000 platform, support is for a single FDDI user only. The way
FDDI Redundant Access works is that the FDDI can be dual homed into the
SecureFast network, but will be single attached due to the Primary and
Standby Redundant Access ports.

 The Redundant Access standby port will not detect a pulled link and a
reinsertion of another link until it becomes primary.

 Advanced VLAN Policy
 The maximum number of VLANs supported by the Advanced VLAN Policy
application is 128. This allows for each of the 128 VLANs to be paired
against any or all of the remaining 127 VLANs for flooding and unicast
connection policies to be defined. If there are more than 128 VLANs defined
within the SPECTRUM VLAN Manager, Advanced VLAN Policy cannot be enabled.

 Advanced VLAN Policy is a tool for static VLANs only and will not work with
inherited AMR VLANs. SPECTRUM VLAN Manager will allow for Advanced VLAN
Policy to be enabled when AMR VLANs are enabled, however, AMR flooding policy
will defeat the purpose of the Advanced VLAN Policy. It is recommended to use
either Automatic Membership Registration or Advanced VLAN Policy one at a
time.

 When Advanced VLAN Policy is enabled, the default VLAN policy (Open or
Secure) is used to create the initial unicast connection relationships
between all VLANs. Since there was no notion of inter-VLAN flooding in the
legacy model, all VLANs are configured to not flood to each other by default
in order to act consistently with the legacy model when no changes have been
made. The default flood mode can be changed, but only through SPECTRUM VLAN
Manager. If the default flood mode is enabled for a VLAN, other VLANs will be
able to flood to that VLAN by default in Advanced VLAN Policy. Note, however
the corollary is not true. Operationally, if the Advanced VLAN Policy table
has not been changed after enabling it, flooding and unicast connection
policies will behave as if they were in their legacy (default) mode. (i.e.
Users in Open VLANs will be able to connect to users of other Open VLANs,
while users in Secure VLANs will not be able to connect to any VLANs. All
flooding will remain intra-VLAN.) Outside of Advanced VLAN Policy, VLANs can
still be toggled to be Open or Secure. If the Advanced VLAN Policy table
remains unchanged, toggling the default mode of a VLAN to be Open or Secure
will result in a change of the flooding and unicast connection policies
within Advanced VLAN Policy to operate exactly as if the VLANs were in their
new legacy (default) mode. If changes were made to any of the flooding or
unicast connection policies within Advanced VLAN Policy between any two
VLANs, changing the default policy mode will not affect the Advanced VLAN
Policy table. The settings within Advanced VLAN Policy will remain as they
were changed, however new VLANs to be added to the Advanced VLAN Policy table
will default to operate with the existing VLANs according to the existing
VLANs legacy (default) mode.

 Note: The difficult part about the above scenario is what happens when a
VLAN is toggled when Advanced Policy is running. Note that the logic checks
to see if any changes were made respecting that particular VLAN. If no
changes have been made in Advanced VLAN Policy regarding that particular
VLAN, then the connect policy against all other VLANs will be re-calculated
according to its new default value. If it has been modified in any way
through Advanced VLAN Policy, then the previously defined settings will be
left alone. The new default connect policy will be used to determine its
initial value against any newly created VLANs. This check is done on an
individual VLAN basis and not table-wide. That is, changes may have been made
to the table for other VLANs, but if the behavior of a particular VLAN was
not changed at all, then its settings will be modified in the Advanced VLAN
Policy table.

 If Advanced VLAN Policy is disabled, then VLAN behavior will resume
according to the legacy rules.

 Disabling flooding (flooding-off) for a VLAN prevents floods from being
transmitted on that VLAN, but does not necessarily prevent floods from being
received on that VLAN. A VLAN may still receive floods if it has been defined
by Advanced VLAN Policy for this VLAN to see the broadcast floods from other
VLANs where flooding is still enabled. For example: If flooding is disabled
for the blue VLAN, floods will no longer be generated by users within the
VLAN. However, if rules within Advanced VLAN Policy were changed to allow
other VLANs to flood to the blue VLAN, the blue VLAN will still see these
broadcasts. Disabling a VLAN through SPECTRUM VLAN Manager still disables a
VLAN with Advanced VLAN Policy.

 If switches reset, Advanced VLAN Policy will remain enabled, however VLANs
will operate in default mode until the SPECTRUM VLAN Manager populates the
Advanced VLAN Policy table. If NVRAM is toggled and reset on a switch, the
VLANs will operate in default mode.

 It is recommended to have users maintain single VLAN membership as opposed
to multiple VLAN memberships when using Advanced VLAN Policy. With Advanced
VLAN Policy, only a single membership is actually necessary because
individual connection policies can be made on a VLAN pair basis. It is
mechanically possible to maintain multiple VLAN memberships within Advanced
VLAN Policy, however, there is a possibility for strange and unpredictable
flood behavior.

 DHCP
 When configuring DHCP relay agents, it is a requirement that each VLAN have
a unique relay agent value. The

 relay agent values can represent the same subnet, but still need to be
unique. For example:

 Given subnet 134.141.xx.0

                        VLAN Name     Relay Agent
 Configuration DONT     Blue Red      134.141.xx.1 134.141.xx.1
 Configuration DO       Blue Red      134.141.xx.1 134.141.xx.2

 Note: The relay agent IP addresses represent the same subnet but they are
unique.

 DHCP requests will be flooded to the source VLAN from which the request
originated. Using Advanced VLAN Policy, it is possible to create a DHCP
server target VLAN. This will allow the user to open flooding and connection
policies between the DHCP Server VLAN, and all other VLANs which the user
wishes the DHCP Server to service. This avoids the requirement of needing to
place the DHCP Server as a member of all VLANs which it needs to serve.

 Duplicate MAC Address Support
 On non-Token Ring platforms, if the link goes down on the port with the
active duplicate MAC user, the switch will not attempt to reconnect to the
other duplicate MAC user(s). Workaround is to delete the connections to the
inactive duplicate MAC user.

 VRRP
 VRRP packets will be flooded between routers via the Control channel. A
problem can occur if the Control channel is broken. During this time, both
routers will think they are master. Once the Control channel recovers, the
routers will arbitrate so that only one is master but the virtual MAC will be
in both places.

 IP multicast has to be enabled in order for the switches to clean up the
Directory after the primary router has transitioned to backup.

 IP multicast has to be enabled in order for the switches to create a
multicast connection between the routers and therefore, not rely on the flood
channel for inter-router communication.

 HSRP
 IP multicast has to be enabled in order for the switches to create a
multicast connection between the routers and therefore, not rely on the flood
channel for inter-router communication.

 If the router interfaces of a single group are located on different switches
but same chassis, it is recommended to decrease the switch hello timers. This
only needs to be done if the HSRP timeout value is less than 20 sec. This is
needed since there is no electrical loss on the INB, therefore it will take
20 seconds for that neighbor to be reaped from the flood path of its INB
neighbors.

 The inability to ping the virtual IP is possible in certain instances. If a
link/switch is lost that was in the multicast connection path and the new
fail over link does not have the virtual IP in its remote cache this problem
can occur. A resolve timeout will occur because the switch will try to
resolve this IP, hence we have to wait for the flood path to be reestablished.

 The configuration of a SecureFast Default Gateway in a network where Cisco
HSRP (Hot Standby Routing Protocol) is deployed may cause connectivity
problems when fail over occurs. Workaround: 1) Do not configure a SecureFast
Default Gateway in networks where HSRP enabled routers are deployed. 2) It is
recommended to place the connections for HSRP enabled routers (of the same
HSRP group) within the same chassis.

 Dynamic and Provisioned Uplink
 With the addition of Dynamic Uplink support in the 1.8 release, there are
now three different types of switches: VLSP Fabric switches, Dynamic Uplink
switches, and Provisioned Uplink switches. The default mode for a switch is
VLSP fabric switch. It is recommended to migrate to Dynamic Uplink switching,
if the previous mode of Uplink switching (Provisioned Uplink Switching) is
still being used. The older Provisioned Uplink feature will be deprecated in
favor of Dynamic Uplink switching with all future releases. The way these
switches operate with each other varies under different circumstances. The
following rule applies to configuring switches with the three basic types of
topology awareness: dynamic uplink, provisioned uplink, and fabric (VLSP); If
Provisioned Uplink switching is the current mode of operation for a switch,
the switch needs to be unprovisioned before being transitioned into a Dynamic
Uplink or VLSP Fabric switch. However, a VLSP Fabric switch will
automatically transition to a Dynamic Uplink switch upon configuration.

 When reconfiguring uplink switches within a chassis to be VLSP Fabric
switches, or when there is a chassis that has been configured for uplink and
it is desired that the chassis be part of the VLSP fabric again, it is
necessary to make sure all switches within the chassis are reconfigured
before one switch can finish the reboot process. This is due to the various
repercussions that occur when switches of mixed topology awareness are in the
same chassis.

 It is recommended to rerun the "Uplinker" tool whenever switches are added
or changes are made to an Uplink chassis. If it is unknown which mode the
switch being placed into the chassis is currently in, it is possible to
verify switch mode by checking the bindery status within Local Management. If
the service.facility.uplink component is enabled, the switch is a Dynamic
Uplink Switch. If the service.facility.fabric component is enabled, the
switch is a VLSP Fabric switch. If both the service.facility.uplink and
service.facility.fabric components are disabled, the switch is a Provisioned
Uplink switch.

 Additionally, connecting the chassis together via front port or Inter-Switch
Link connections has different results when using the different types of
switches. The following graph represents the various outcomes when connecting
switches of various topology awareness to each other:

                                    [Image]

 Please note that clearing NVRAM and resetting the switches will enable the
switch as a VLSP Fabric switch. This is the default mode for all switches,
and will ensure that all previous uplink configurations are erased from
memory.

 Router Port
 Layer 3 learning can be toggled on router ports only, instead of all ports.
Previously, the layer three learning state on a port could be changed
independently from the router port state. With this "fix", the only time
there can be a layer three learning value other than "other", is when the
port is a router port. When a port is a router port, there are two values for
the layer three learning: enabled and disabled. The default value is
disabled. This means that when the user migrates from 1.7 to 1.8, the
non-router ports will show "other" for layer 3 learning. (Note: Learning will
take place.) For the router ports, layer three learning will be disabled.
This means that the switch will behave the same before and after a migration.
(In regards to layer three learning.)

 Connections
 Provisioned source user-to-broadcast/multicast/unicast circuits configured
through SPECTRUM VLAN Manager are not restored upon a switch reset. Solution:
Reconfigure your provisioned circuits following a switch reset.

 Persistence
 There are a number of attributes that remain persistent in memory on
SPECTRUM VLAN Manager or in the switch NVRAM, upon a switch reset. The
following table below lists the various attributes which may or may not be
persistent in 1.07.x, 1.08.x, and 1.09.x networks. The column title indicates
the feature, switch firmware version, VLANServer application version and
comments. For example, the column for SFS 1.7.x identifies all SmartSwitches
operating with SFS version 1.7 firmware. The cells below the column will
explicitly state the persistence of objects in memory or the maximum number
of entries. Furthermore, VLAN membership (user) on item 6 will not be
retained in the switch on a reset, however the application does store it in
the database and will restore the original configuration after successfully
contacting the switch.

 Cabletron VLAN Switch and Application Matrix

 Feature                              SFS 1.7.x SFS 1.8.x VLANServer Comments
                                                          1.8, 1.9
                                                SFS 1.9.x and 2.0
                                                SFS 2.0.x
                                                *
 1 Default VLAN on port               yes       yes       yes        1
 2 Policy for VLAN                    yes       yes       yes        1
 3 VLAN flooding enable/disable       yes       yes       yes        1
 4 VLAN enable/disable                yes       yes       yes        1
 5 VLAN name and attributes           no        no        yes        1
 6 VLAN membership (user)             no        no        yes        1
 7 Provisioned connection             no        no        no
  Protocol Policy Rules
 8 flood on/off                       no        yes       yes        2
 9 discover layer 3 address on/off    no        yes       no
 10 SAP (Service Access Point)        up to 64  up to 64  no         4
 11 AMR rules                         up to 32  up to 32  yes        5
 12 AMR subnet prefix and mask        up to 32  up to 32  yes        5
  Multicast
 13 IGMP query interval               yes       yes       yes
 14 Provisioned IP multicast receiver up to 512 up to 512 no         5
 entries
 15 Provisioned IP multicast          up to 256 up to 256 no         5
 connection
 16 IPMC Sender policy                N/A       yes       yes
 17 IP multicast router interface     yes       yes       no
 18 IP Multicast Policy Modes         no        yes* (2.0 no
                                                only)
 19 IP Multicast Traffic              no        yes* (2.0 no
 Control/Suppression                            only)
  Router Configuration
 20 Router port                       yes       yes       yes
 21 Subnet resolve entries            up to 128 up to 256 yes        5
 22 Default gateway configuration     yes       yes       no
 23 Subnet resolve subnet mask        yes       yes       yes
 24 Subnet validation mode            N/A       yes       yes        6
  Topology port parameters
 25 Lock port as access/network       yes       yes       no         7
 26 static path uplink and downlink   yes       yes       no         8
 config.
 27 VLAN hello TX and RX frequency    no        yes       no         9
  Services
 28 IP                                yes       yes       no         10
 29 AppleTalk                         yes       yes       no         10
 30 Novell                            yes       yes       no         10
 31 NetBIOS over IPX                  yes       yes       no         10
 32 NetBIOS over IP                   yes       yes       no         10
 33 NetBEUI                           yes       yes       no         10
 34 User mobility                     yes       yes       no         10
 35 Source blocker                    yes       yes       no         10
 36 Flood Suppress                    yes       yes       no         10, 13
 37 Multicast                         yes       yes       no         10
 38 Redundant Access                  yes       yes       no         10
 39 DHCP relay address                no        yes       no         10, 11
  Other
 40 Advanced VLAN Policy              N/A       no        yes
 41 Call tap                          no        no        no
 42 Port redirect                     N/A       no        no
 43 Connection age parameters         no        no        no         12
 44 Flood suppress parameter          no        yes       no         13
 45 Source block parameter            no        yes       no
 46 Static directory entries          no        no        no         14
 47 Restricted port (see comments)    N/A       yes       no         15
 48 Restricted node                   N/A       yes       no         15
 49 MAC / port unblockable            no        yes       no         15
 50 Redundant access                  yes       yes       no

 Comments:

 1. If switch NVRAM is cleared, application will restore setting.

 2. Flooding of protocol such as IP, IPX, AppleTalk, RTMP, and OSPF.

 3. Switch proxy ARP reply enable / disable.

 4. Frame type control is also available such as IPX 802.3 and IPX 802.2

 5. Memory constraints on the switch cap the number of entries.

 6. Options are learn IP address, discard packet, or off (do not learn IP).

 7. ATM SVC logical ports will not be persistent because after reset, the
logical port cannot be guaranteed.

 8. Static uplink not FCS feature.

 9. Available in the VLAN topology agent port table.

 10. Bindery view exposed in UI.

 11. Attributes of VLAN are persistent only when VLAN is mapped to a port.

 12. Threshold for aging connections (represented in % of connections).

 13. Earlier versions referenced it as "destination blocker".

 14. The directory API provides a mechanism to add MAC, IP, etc.

 15. Restricted port, restricted node, and MAC port unblockable entries are
persistent in the switch and share a common pool of 128 entries (Restrict on
alias uses two entries, alias and MAC)

 Topology
 VLSP, by default, will apply a 100 Mbps metric to all Fast Ethernet ports
regardless of speed or duplex settings.

 In topologies where three or more SecureFast switches are attached via a
shared media segment, redundant physical connections or paths in parallel
with the shared media segment may not exist. Please reference drawing below:

                   Shared Neighbor Support on Network Links

                                    [Image]

                               Sample Topologies

                                    [Image]

                                    [Image]

 Any problems other than those listed above should be reported to our
Technical Support Staff.


----------------------------------------------------------------------------
 Compliance support:
----------------------------------------------------------------------------

 Compliance Level     Compliant
 Year 2000            Yes*

 Known Anomalies: None.

 *NOTE: Please reference individual product release notes for complete
information on Year 2000 Compliance.

 IETF Standards MIB Support:
 Please reference individual product release notes for a complete and updated
list of RFCs and IETF standard MIBs supported by this release.


----------------------------------------------------------------------------
 Cabletron Private Enterprise MIB Support:
----------------------------------------------------------------------------

 Title                  Version
 ct-sfps-base           Rev. 0.0.18
 ct-sfps-bindery        Rev. 0.0.4
 ct-sfps-call           Rev. 0.0.16
 ct-sfps-common         Rev. 0.0.13
 ct-sfps-conn           Rev. 0.0.2
 ct-sfps-connection     Rev. 0.0.11
 ct-sfps-diagstats      Rev. 0.0.3
 ct-sfps-directory      Rev. 0.0.11
 ct-sfps-esys           Rev. 0.0.17
 ct-sfps-eventlog       Rev. 0.0.4
 ct-sfps-flood          Rev. 0.0.3
 ct-sfps-inc            Rev. 0.0.14
 ct-sfps-mcast          Rev. 0.0.5
 ct-sfps-path           Rev. 0.0.8
 ct-sfps-pktmgr         Rev. 0.0.15
 ct-sfps-policy         Rev. 0.0.3
 ct-sfps-port           Rev. 0.0.11
 ct-sfps-resolve        Rev. 0.0.8
 ct-sfps-sflsp          Rev. 0.0.6
 ct-sfps-size           Rev. 0.0.3
 ct-sfps-softlink       Rev. 0.0.3
 ct-sfps-tap            Rev. 0.0.4
 Ct-sfps-topology       Rev. 0.0.9
 ct-sfps-vlan           Rev. 0.0.9
 ct-sfps-vstp           Rev. 0.0.5

 Cabletron Private Enterprise MIBs are available in ASN.1 format from the
Cabletron Systems Support Web Site at: http://www.cabletron.com/support/mibs
Indexed MIB documentation is also available.

 SNMP Trap Support:
 Please reference individual product release notes for a complete and updated
list of Traps/RFCs supported.


----------------------------------------------------------------------------
 Cabletron Private Enterprise trap Support:
----------------------------------------------------------------------------
 Please reference individual product release notes for a complete and updated
list of Traps supported.

 GLOBAL SUPPORT:
 By Phone: (603) 332-9400
 By Email: support@cabletron.com
 By Web: http://www.cabletron.com/support
 By Fax: (603) 337-3075
 By Mail: Cabletron Systems P.O. Box 5005 Rochester, NH 03867-5005

 For information regarding the latest firmware available, recent release note
revisions, or if you require additional assistance, please visit the
Cabletron Systems Support Web Site.