Cisco Systems EA6500 Manual De Usuario

To configure a per-interface policer (see the 

), perform this task: 

When configuring a per-interface policer, note the following:

Policing uses the Layer 3 packet size.

See the 

 for 

information about rate and burst size granularity.

You can enter the flow keyword to define a microflow policer. During microflow policing, the 
following occurs:

PFC QoS considers IPX traffic with same source network, destination network, and destination 
node to be part of the same flow, including traffic with different source nodes or sockets.

PFC QoS considers MAC-Layer traffic with the same protocol and the same source and 
destination MAC-Layer addresses to be part of the same flow, including traffic with different 
ethertypes.

Microflow policers do not support the maximum_burst_bytes parameter, the 
pir bits_per_second keyword and parameter, or the violate-action keyword.

The valid range of values for the CIR bits_per_second parameter is as follows:

Minimum—32 kilobits per second, entered as 32000

Maximum—4 gigabits per second, entered as 4000000000

The normal_burst_bytes parameter sets the CIR token bucket size. 

The maximum_burst_bytes parameter sets the PIR token bucket size (not supported with the flow 
keyword) 

When configuring the size of a token bucket, note the following:

The minimum token bucket size is 1 kilobyte, entered as 1000 (the maximum_burst_bytes 
parameter must be set larger than the normal_burst_bytes parameter)

The maximum token bucket size is approximately 32 megabytes, entered as 31250000 

To sustain a specific rate, set the token bucket size to be at least the rate value divided by 4000, 
because tokens are removed from the bucket every 1/4000th of a second (0.25 ms). 

Router(config-pmap-c)# police [flow] bits_per_second 

normal_burst_bytes [maximum_burst_bytes] [pir

1

 

peak_rate_bps] [[[conform-action {drop | 

2

 dscp_value | set-prec-transmit

ip_precedence_value | transmit}] exceed-action {drop 

| policed-dscp | transmit}] violate-action

 {drop | 

 | transmit}]

1.

Supported only with PFC2. Not supported in microflow policers (the flow keyword configures a microflow policer).

2.

With PFC2, the set-dscp-transmit and set-prec-transmit keywords are only supported for IP traffic.

Creates a per-interface policer and configures the policy map 
class to use it.

Router(config-pmap-c)# no police [flow] 

bits_per_second normal_burst_bytes 

[maximum_burst_bytes] [pir peak_rate_bps] 

[[[conform-action {drop | set-dscp-transmit 

dscp_value | set-prec-transmit ip_precedence_value | 

}] exceed-action {drop | policed-dscp | 

}] violate-action {drop | policed-dscp | 

}]

Deletes the per-interface policer from the policy map class.