Reference Guide

Mark control-plane
OS10(config)# class-map type control-plane copp
OS10(conf-cmap-control-plane)# exit
OS10(config)# policy-map type control-plane copp1
OS10(conf-pmap-control-plane)# class copp
OS10(conf-pmap-c)# set qos-group 2
OS10(conf-pmap-c)# police cir 100 pir 100
View control-plane policy-map
OS10(conf-pmap-c)# do show policy-map
Service-policy(control-plane) input: copp1
Class-map (control-plane): copp
set qos-group 2
police cir 100 bc 100 pir 100 be 100
Trac metering
Metering applies to shaping and policing network trac and ensures better service for trac. OS10 includes congestion management tools
to raise the priority of a ow by queuing and servicing queues in dierent ways.
The queue management mechanism used for congestion avoidance raises the priority by dropping trac from lower-priority ows before
trac from higher-priority ows. Policing and shaping provides priority to a ow by limiting the throughput of other ows.
You can congure a guaranteed bandwidth percentage by examining for the egress out ows on the queue. For example, if you have
identied three dierent ows which are egressing out of an interface, you can congure the bandwidth ratio for the ows as 3:2:1 which
means:
• 1st ow—50
• 2nd ow—33.3
• 3rd ow—16.66
The conguration is then:
• Bandwidth percent 50 = bandwidth percent 3
• Bandwidth percent 33 = bandwidth percent 2
• Bandwidth percent 17 = bandwidth percent 1
Bandwidth allocation
You can allocate relative bandwidth to limit large ows and prioritize smaller ows. Allocate the relative amount of bandwidth to nonpriority
queues when priorities queues are consuming maximum link bandwidth.
Each egress queue of an interface can be scheduled as per Weighted Decit Round Robin (WDRR) or by strict-priority (SP), which are
both mutually exclusive. If the bandwidth percent command is present, you cannot congure the priority command as it is used
to assign bandwidth to a queue.
1 Create a class-map of type queuing and congure a name for the class-map in CONFIGURATION mode.
class-map type queuing class-map-name
2 Apply the match criteria for the QoS group in CLASS-MAP mode.
qos-group queue-number
3 Return to the CONFIGURATION mode.
exit
4 Create a policy-map of type queuing and congure a policy-map name in CONFIGURATION mode.
policy-map type queuing policy-map-name
5 Congure a queuing class in POLICY-MAP mode.
class class-name
486
Quality of service