Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual page 608

Configuring PFC QoS
This example shows how to verify the configuration:
Router# show mls qos maps | begin IpPrecedence-dscp map
IpPrecedence-dscp map:
<...Output Truncated...>
Router#
Configuring DSCP Markdown Values
To configure the mapping of DSCP markdown values used by policers, perform this task:
Command
Step 1
Router(config)# mls qos map policed-dscp
{normal-burst | max-burst} dscp1 [dscp2 [dscp3
[dscp4 [dscp5 [dscp6 [dscp7 [dscp8]]]]]]] to
markdown_dscp
Router(config)# no mls qos map policed-dscp
{normal-burst | max-burst}
Step 2
Router(config)# end
Step 3
Router# show mls qos maps
When configuring a DSCP markdown map, note the following information:
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Note Configure marked-down DSCP values that map to CoS values consistent with the markdown penalty.
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
38-74
ipprec: 0 1 2 3
----------------------------------
dscp: 0 1 2 3
You can enter the normal-burst keyword to configure the markdown map used by the
exceed-action policed-dscp-transmit keywords.
You can enter the max-burst keyword to configure the markdown map used by the violate-action
policed-dscp-transmit keywords.
When you create a policer that does not use the pir keyword, and the maximum_burst_bytes
Note
parameter is equal to the normal_burst_bytes parameter (which occurs if you do not enter
the maximum_burst_bytes parameter), the exceed-action policed-dscp-transmit keywords
cause PFC QoS to mark traffic down as defined by the policed-dscp max-burst markdown
map.
To avoid out-of-sequence packets, configure the markdown maps so that conforming and
nonconforming traffic uses the same queue.
You can enter up to 8 DSCP values that map to a marked-down DSCP value.
You can enter multiple commands to map additional DSCP values to a marked-down DSCP value.
You can enter a separate command for each marked-down DSCP value.
4 5 6 7
4 5 6 7
Purpose
Configures a DSCP markdown map.
Reverts to the default map.
Exits configuration mode.
Verifies the configuration.
Chapter 38 Configuring PFC QoS
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