This tab lets you configure a class of service (CoS) to include one or more of
the following components: an 802.1p priority, an IP type of service (ToS) value,
rate limits, and transmit queue configuration. Once you have created and defined a class of service, you can then
apply it as a classification
rule action, as part of the definition of an automated service, or as a role
default. For more information, see
Getting Started with Class of Service.
To access this tab, the
class of service must already exist in the Classes of Service folder in the left-panel Classes of
Service tab (see How to Create a Class of Service).
Select the class of service in the left panel, then
select the General tab in the right panel.
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Click the graphic for more information.
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Name
- Name of the selected class of service.
- 802.1p Priority
- Use the drop-down list to select an 802.1p priority (0-7 with 7
being the highest priority) to associate with the class of service. If the 802.1p priority is
associated with a particular inbound and/or outbound priority-based rate
limit, that rate limit information will be displayed below.
Changing the 802.1p Priority will also change the
Transmit Queue Index to the default index for the selected priority.
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Enable ToS
- Select this option to associate an IP ToS (Type of
Service) or DSCP (Diffserv Codepoint) value with the class of service. The IP type of service value is an
8-bit hexadecimal number between 0 and
FF (see IP
Type of Service for more information). You can
either enter this value in the Value 0x text box, or click Select
to open the ToS/DSCP Configuration window,
where you can automatically configure a ToS (Type of Service) or DSCP (Diffserv
Codepoint) value. When you click OK, the IP/ToS value appears in the left panel IP Type of
Service Values folder.
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NOTE: |
If you apply a class of service with a ToS/DSCP value as a role default, the
ToS/DSCP value will be ignored.
This is because ToS/DSCP rewrite works
only for certain IP ToS classification rules, not as a role default. See
ToS/DSCP Rewrite for more information.
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Transmit Queue Tab
This tab lets you change the default transmit queue index associated with
the class of service. This index number is used by devices that support
Role-Based Rate Limit and Transmit Queue Configuration as a class of service
mode. Once you have selected the index, the table below displays
the actual transmit queues that will be used by each transmit queue port group
for that class of service.
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Click the graphic for more information.
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Transmit Queue Index
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Transmit Queue Index numbers map logical transmit queue indexes on the ports to
the actual physical transmit queues you have configured in Policy Manager. A
default transmit queue index is automatically specified based on the
802.1p priority associated with the class of
service. You can use the default index or change it according to your own
transmit queue configuration.
Click Select to open the Transmit Queues selection view window, which lists all the possible
transmit queues, organized by index number for each existing port type and
group. Selecting an index automatically includes all the transmit queues
configured for that index number.
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Table
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Displays information about the selected transmit queue mapping index:
- Port Type - the type of port group, based on the number of transmit queues
the ports support: for example, 4-queue port groups (queues 0-3) and 16-queue
port groups (queues 0-15)
- Port Group
- the name of the port group.
- Transmit Queue - the actual physical transmit queue that
will be used by that port group for this class of service.
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View/Edit Port Group
- Opens the port group Ports tab
where you can view all the ports in the selected port group, as well as
add and remove ports to and from the group.
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View/Edit Transmit Queue
- Opens the transmit queue General tab
where you can configure the selected transmit queue.
Role-Based IRL Tab
This tab allows you to select a role-based inbound rate limit (IRL) index
to associate with the class of service. This index number is used by devices
that support Role-Based Rate Limit and Transmit Queue Configuration as a class
of service mode. Once you have selected the index, the
table below displays the actual rate limits for each port type and port
group for that index.
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NOTE: |
Policy Manager currently supports only inbound role-based rate limits.
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Click the graphic for more information.
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Inbound Rate Limit Mapping Index
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Inbound Rate Limit Index numbers map logical rate limit indexes to the actual
physical rate limits you have created in Policy Manager.
Click Select to open the Inbound Rate Limits selection view window, which lists all the possible rate
limits,
organized by index number for each existing port type and group. Selecting an index includes all the rate limits configured for
that index number.
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Table
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Displays information about the selected rate limit mapping index.
- Port Type - the type of port group, based on the number of rate limits the
ports support.
- Port Group - the name of the port group.
- Rate Limit - the
actual rate limit that will be used by that port group for this class of
service.
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View/Edit Port Group
- Opens the port group Ports tab
where you can view all the ports in the selected port group, as well as
add and remove ports to and from the group.
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View/Edit Rate Limit
- Opens the rate limit General tab
where you can configure the selected rate limit.
Description
Use this area to enter or modify the description of the selected class of service.
For information on related concepts:
For information on related tasks:
For information on related windows: