Reference Guide

Version Description
8.2.1.0 Added the kbps option on the C-Series, E-Series, and S-Series.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.5.1.0 Expanded the command to permit configuration on port channels.
6.1.1.1 Introduced on the E-Series.
Usage
Information
To honor all incoming 802.1p markings on incoming switched traffic on the interface, enter this command.
By default, this facility is not enabled (that is, the 802.1p markings on incoming traffic are not honored).
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.
Syntax
[no] service-class wred {green | weight | yellow} backplane{[queue0 number/
string] || [queue1 number/string] || [queue2 number/string] || [queue3
number/string] || [queue4 number/string] || [queue5 number/string] ||
[queue6 number/string] || [queue7 number/string]}
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.
backplane Specify that the WRED weight and profile configured for each queue apply to
backplane ports.
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.
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.
Command Modes QOS-POLICY-OUT mode
Command
History
Version Description
9.2.1.0 Introduced on the Z9500 switch.
1112 Quality of Service (QoS)