Configuring Congestion Management; Configuring Bandwidth And Bandwidth Remaining - Cisco Nexus 7000 Series Configuration Manual

Configuring Congestion Management

Step 6
Configuring Congestion Management
You can configure only one of the following congestion management methods in a policy map:
• Allocate a minimum data rate to a queue by using the bandwidth and bandwidth remaining commands.
• Allocate all data for a class of traffic to a priority queue by using the priority command. You can use
• Allocate a maximum data rate to a queue by using the shape command.
In addition to the congestion management feature that you choose, you can configure one of the following
queue features in each class of a policy map:
• Taildrop thresholds based on the queue size and the queue limit usage. For more information, see the
• WRED for preferential packet drops based on CoS. For more information, see the "Configuring WRED

Configuring Bandwidth and Bandwidth Remaining

You can configure the bandwidth and bandwidth remaining on both ingress and egress queues to allocate a
minimum percentage of the interface bandwidth to a queue. You use the system-defined ingress or egress
queue class for the type of module to which you want to apply the policy map. For the list of system-defined
ingress or egress queue classes for each module, see
page
Note When a guaranteed bandwidth is configured, the priority queue must be disabled in the same policy map.
Procedure
Step 1
Cisco Nexus 7000 Series NX-OS Quality of Service Configuration Guide
104
Command or Action
switch(config-pmap-c-que)# exit
the bandwidth remaining command to distribute remaining traffic among the nonpriority queues. By
default, the system evenly distributes the remaining bandwidth among the nonpriority queues.
"Configuring Tail Drop by COS Values" section and "Configuring Tail Drop by DSCP Values" section.
by COS Values" section and "Configuring WRED by DSCP Values" section.
15.
Command or Action
switch# configure terminal
Configuring Queuing and Scheduling on M-Series I/O Modules
Purpose
be of the same type. The default threshold is in
packets. Thresholds are from 1 to 52428800.
The percentage range is from 1 to 100.
Optional: repeat Step 5 to configure WRED for
other DSCP values.
Optional: repeat Steps 3 through 6 to configure
WRED for other DSCP queuing classes.
Exits policy-map queue mode, and enters global
configuration mode.
Table 6: System-Defined Type queuing Class Maps, on
Purpose
Enters global configuration mode.