In this example, the Two-Rate Policer is configured on a class to limit traffic to an average committed rate of 500 kbps and a peak rate of 1 Mbps.
Router(config)# class-map police
Router(config-cmap)# match access-group 101
Router(config-cmap)# policy-map policy1
Router(config-pmap)# class police
Router(config-pmap-c)# police cir 500000 bc 10000 pir 1000000 be 10000 conform-action
transmit exceed-action set-prec-transmit 2 violate-action drop
Router(config)# interface serial3/0/0
Router(config-if)# service-policy output policy1
Router(config-if)# end
Router# show policy-map policy1
Policy Map policy1
Class police
police cir 500000 conform-burst 10000 pir 1000000 peak-burst 10000 conform-action transmit exceed-action set-prec-transmit 2 violate-action drop
Traffic marked as conforming to the average committed rate (500 kbps) will be sent as is. Traffic marked as exceeding 500 kbps, but not exceeding 1 Mbps, will be marked with IP Precedence 2 and then sent. All traffic exceeding 1 Mbps will be dropped. The burst parameters are set to 10,000 bytes.
In the following example, 1.25 Mbps of traffic is sent ("offered") to a policer
class.
Router# show policy-map interface serial3/0/0
Serial3/0/0
Service-policy output: policy1
Class-map: police (match all)
148803 packets, 36605538 bytes
30 second offered rate 1249000 bps, drop rate 249000 bps
Match: access-group 101
police:
cir 500000 bps, conform-burst 10000, pir 1000000, peak-burst 100000
conformed 59538 packets, 14646348 bytes; action: transmit
exceeded 59538 packets, 14646348 bytes; action: set-prec-transmit 2
violated 29731 packets, 7313826 bytes; action: drop
conformed 499000 bps, exceed 500000 bps violate 249000 bps
Class-map: class-default (match-any)
19 packets, 1990 bytes
30 seconds offered rate 0 bps, drop rate 0 bps
Match: any
The Two-Rate Policer marks 500 kbps of traffic as conforming, 500 kbps of traffic as exceeding, and 250 kbps of traffic as violating the specified rate. Packets marked as conforming will be sent as is, and packets marked as exceeding will be marked with IP Precedence 2 and then sent. Packets marked as violating the specified rate are dropped.