Cisco 6500 Series Software Configuration Manual page 436

Configuring PFC QoS
Configuring a Per-Interface Policer
To configure a per-interface policer (see the
Command
Router(config-pmap-c)# police [flow] bits_per_second
normal_burst_bytes [maximum_burst_bytes] [pir
peak_rate_bps] [[[conform-action {drop |
2
set-dscp-transmit dscp_value | set-prec-transmit
ip_precedence_value | transmit}] exceed-action {drop
| policed-dscp | transmit}] violate-action
policed-dscp | transmit}]
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 |
transmit}] exceed-action {drop | policed-dscp |
transmit}] violate-action {drop | policed-dscp |
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.
When configuring a per-interface policer, note the following:
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{drop |
Policing uses the Layer 3 packet size.
See the "PFC QoS Configuration Guidelines and Restrictions" section on page 31-31
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).
"Policers" section on page
Purpose
Creates a per-interface policer and configures the policy map
class to use it.
2
Deletes the per-interface policer from the policy map class.
Chapter 31 Configuring PFC QoS
31-19), perform this task:
for
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