Cisco Catalyst 3750 Software Configuration Manual page 575

Chapter 26 Configuring QoS
Command
Step 6 random-detect precedence ip-precedence
min-threshold max-threshold
mark-prob-denominator
Step 7 random-detect
exponential-weighting-constant weight
Step 8
exit
Step 9
exit
Step 10
interface interface-id
Step 11 service-policy output policy-map-name
Step 12
end
Step 13
show policy-map [policy-map-name [class
class-map-name]]
or
show policy-map interface interface-id
Step 14 copy running-config startup-config
To delete an existing policy map, use the no policy-map policy-map-name global configuration
command. To delete an existing class, use the no class class-name policy-map configuration command.
To return to the default bandwidth, use the no bandwidth policy-map class configuration command. To
disable IP precedence-based WRED, use the no random-detect precedence-based policy-map class
configuration command. To return to the default WRED settings, use the no random-detect precedence
ip-precedence policy-map class configuration command.
78-15870-01
Purpose
Specify packet threshold and mark-probability values for a specific IP
precedence value:
• For ip-precedence, specify an IP precedence value. The range is 0
to 7.
• For min-threshold, specify the minimum threshold in packets. The
range is 1 to 32768. When the average queue size reaches the
minimum threshold, WRED randomly drops some packets with
the specified precedence value.
For max-threshold, specify the maximum threshold in packets.
•
The range is 1 to 32768. The default is 128. When the average
queue size exceeds the maximum threshold, WRED drops all
packets with the specified precedence value.
• For mark-prob-denominator, specify the denominator for the
fraction of packets dropped when the average queue size is at the
maximum threshold. The range is 1 to 65535. The default is 10.
For example, if the denominator is 512, one out of every 512
packets is dropped when the queue is at the maximum threshold.
For a list of the default settings for a specified IP precedence value, see
the command reference for this release.
(Optional) Configure the exponential weight factor for the average
queue-size calculation for WRED. The range is 1 to 16. The default
is 9.
Return to policy-map configuration mode.
Return to global configuration mode.
Specify an ES port to attach to the policy map, and enter interface
configuration mode.
Specify the egress policy-map name, and apply it to the ES port.
Only one policy map per port is supported.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Catalyst 3750 Metro Switch Software Configuration Guide
Configuring Hierarchical QoS
26-95