Usage Guidelines For The Set Mpls Experimental Imposition Command; Discard-Class Marking; Set Discard-Class Command; Syntax Description - Cisco 10000 Series Configuration Manual

Discard-Class Marking

Cisco IOS software replaced the set mpls experimental command with the set mpls experimental
Note
imposition command. However, the Cisco 10000 series router continues to use the set mpls
experimental command for PRE1. For PRE2, the command is set mpls experimental imposition.

Usage Guidelines for the set mpls experimental imposition Command

The set mpls experimental imposition command is supported only on input interfaces. Use this
command during label imposition. This command sets the MPLS EXP field on all imposed label entries.
You can use the set mpls experimental imposition command on the input interface of a provider edge
(PE) router connected to a customer edge (CE) router. In MPLS QoS differentiated services (DiffServ)
tunneling modes, you can also use this command on the input interfaces of CE routers in pipe mode.
The Cisco 10000 series router does not support the set mpls experimental topmost command.
Note
Discard-Class Marking
The discard-class is a 3-bit field that is used to set the per-hop behavior (PHB) for dropping traffic. The
discard-class indicates the drop portion of the PHB. You can set the discard-class on the input interface
to use as a matching criterion and to affect how packets are dropped on the output interface. You can use
the discard-class with weighted random early detection (WRED) on the output interface to classify
packets and determine packet drop probability. You can set up to eight discard-class values (0 through 7).

set discard-class Command

To mark a packet with a discard-class value or to drop a specific traffic type during congestion, use the
set discard-class command in policy-map class configuration mode. To remove a discard-class value or
to disable the discard-class value, use the no form of the command. By default, the discard-value is zero.
set discard-class value
no set discard-class value

Syntax Description

value

set discard-class Command History

Cisco IOS Release
Release 12.3(7)XI
Release 12.2(28)SB
Cisco 10000 Series Router Quality of Service Configuration Guide
7-16
Is the priority of a type of traffic. Valid values are from 0 to 7.
Note This command is available only on the PRE2.
Description
This command was introduced on the PRE2 only.
This command was integrated in Cisco IOS Release 12.2(28)SB for the
PRE2.
Chapter 7 Marking Traffic
OL-7433-09