Configuring Modular QoS Congestion Avoidance on Cisco ASR 9000 Series Routers
How to Configure Modular QoS Congestion Avoidance on Cisco ASR 9000 Series Routers
QC-83
Cisco ASR 9000 Series Aggregation Services Router Modular Quality of Service Configuration Guide
OL-23108-02
Note The default queue-limit is set to bytes of 100 ms of queue bandwidth. The following formula is used to
calculate the default queue limit (in bytes):
bytes = (100 ms / 1000 ms) * queue_bandwidth kbps)) / 8
Restrictions
• When configuring the queue-limit command in a class, you must configure one of the following
commands: priority, shape average, bandwidth, or bandwidth remaining, except for the default
class.
SUMMARY STEPS
1. configure
2. policy-map policy-name
3. class class-name
4. queue-limit value [units]
5. class class-name
6. bandwidth {bandwidth [units] | percent value}
or
bandwidth remaining [percent value | ratio ratio-value]
7. exit
8. exit
9. interface type interface-path-id
10. service-policy {input | output} policy-map
11. end
or
commit
DETAILED STEPS
Command or Action Purpose
Step 1
configure
Example:
RP/0/RSP0/CPU0:router# configure
Enters global configuration mode.
Step 2
policy-map
policy-name
Example:
RP/0/RSP0/CPU0:router(config)# policy-map
policy1
Enters policy map configuration mode.
• Creates or modifies a policy map that can be attached to
one or more interfaces to specify a service policy.
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