Chapter 23
| Quality of Service Commands
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Tc is not incremented.
When a packet of size B bytes arrives at time t, the following happens:
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If Tc(t)-B 0, the packet is green and Tc is decremented by B down to the
minimum value of 0, else
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else the packet is red and Tc is not decremented.
Example
This example creates a policy called “rd-policy,” uses the class command to specify
the previously defined “rd-class,” uses the set phb command to classify the service
that incoming packets will receive, and then uses the police flow command to limit
the average bandwidth to 100,000 Kbps, the burst rate to 4000 bytes, and configure
the response to drop any violating packets.
Console(config)#policy-map rd-policy
Console(config-pmap)#class rd-class
Console(config-pmap-c)#set phb 3
Console(config-pmap-c)#police flow 100000 4000 conform-action transmit
violate-action drop
Console(config-pmap-c)#
police srtcm-color This command defines an enforcer for classified traffic based on a single rate three
color meter (srTCM). Use the no form to remove a policer.
Syntax
[no] police {srtcm-color-blind | srtcm-color-aware}
committed-rate committed-burst excess-burst
conform-action transmit
exceed-action {drop | new-dscp}
violate action {drop | new-dscp}
srtcm-color-blind - Single rate three color meter in color-blind mode.
srtcm-color-aware - Single rate three color meter in color-aware mode.
committed-rate
- Committed information rate (CIR) in kilobits per second.
(Range: 0-10000000 kbps at a granularity of 64 kbps or maximum port
speed, whichever is lower)
committed-burst
- Committed burst size (BC) in bytes.
(Range: 64-16000000 at a granularity of 4k bytes)
excess-burst
- Excess burst size (BE) in bytes.
(Range: 64-1600000 at a granularity of 4k bytes)
conform-action - Action to take when rate is within the CIR and BC. (There
are enough tokens in bucket BC to service the packet, packet is set green).
exceed-action - Action to take when rate exceeds the CIR and BC but is
within the BE. (There are enough tokens in bucket BE to service the packet,
the packet is set yellow.)
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