Command Line Reference Guide

You can apply this command on both physical interfaces and port channels. When
you set the service-class dynamic for a port channel, the physical interfaces
assigned to the port channel are automatically configured; you cannot assign the
service-class dynamic command to individual interfaces in a port channel.
• All dot1p traffic is mapped to Queue 0 unless you enable the service-class
dynamic dot1p
command on an interface or globally.
• Layer 2 or Layer 3 service policies supersede dot1p service classes.
service-class wred backplane
After you create a WRED profile with ECN functionality, specify per-queue granularity for backplane ports
and include the WRED profile in a service class. Using this command, you can enable or disable queue-
specific settings and specify minimum and maximum buffer thresholds in the WRED profile applied to
each packet color-code. Also, you can specify the maximum drop rate percentage for yellow and green
profiles. The per-queue profile configured is applied to all the backplane ports.
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Syntax
[no] service-class wred {green | weight | yellow} {[queue0
number/string] || [queue1 number/string] || [queue2 number/
string] || [queue3 number/string] || [queue4 number/string] ||
[queue5 number/string] || [queue6 number/string] || [queue7
number/string]} backplane
Parameters
service-class Define the mapping between the service class and policy-
based QoS or routing.
wred Specify WRED curve parameters for a queue
green Specify green (low) drop precedence to a queue.
weight Specify a weight factor to a queue.
yellow Specify yellow (medium) drop precedence to a queue.
queue 0 to
queue 7
Specify the queue number to which the WRED parameters
apply.
number Enter a weight for the queue as a number in the range of 1 to
15. This parameter applies only if you specify the green or
yellow drop precedence.
string Enter the WRED profile name. It is a string of up to 32
characters. Or use one of the five pre-defined WRED profile
names. Pre-defined Profiles: wred_drop, wred-ge_y,
wred_ge_g, wred_teng_y, wred_teng_. This parameter
applies only if you specify a weight factor.
backplane Specify that the WRED weight and profile configured for
each queue apply to backplane ports.
Default All queues on backplane ports operate in tail-drop (best-effort traffic) mode by
default. There is no default WRED green or yellow profile. The default weight is 0.
Quality of Service (QoS)
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