Feature History For Tunnel Header Marking; Restrictions And Limitations For Marking - Cisco 10000 Series Configuration Manual

Quality of service configuration guide

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Marking Traffic

Feature History for Tunnel Header Marking

Cisco IOS Release

Release 12.2(31)SB2

DSCP-Based and Precedence-Based Marking

Frame Relay DE Bit Marking Restrictions

Tunnel Header Marking

Cisco 10008 Router

Tunnel Header Marking

This feature was introduced on the PRE2 to allow you to

mark the outer IP header's DSCP or precedence value

during tunnel encapsulation of the packet.

You cannot simultaneously configure both the set ip dscp command and the set ip precedence

command in a policy map.

Because IP precedence is actually part of the DSCP value, you cannot simultaneously set both the

IP precedence and DSCP values for a traffic class. A packet can have one value or the other, but not

both. If you do configure both values, the router marks the packet with the DSCP value.

Because the router copies the IP precedence value to the MPLS EXP bits during label imposition,

you cannot simultaneously set both IP precedence and MPLS experimental marking for a class.

Marking has no preset scaling limit.

In Cisco IOS Release 12.3(7)XI, the router accepts the set precedence and set dscp commands

without specifying the ip keyword. However, you must specify the set ip precedence command to

set the precedence value in a packet header and the set ip dscp command to set the DSCP value. The

ip keyword is required.

In Cisco IOS Release 12.3(7)XI, when you enter the set ? command, the context-sensitive help lists

the fr-de keyword to allow you to set the Frame Relay discard eligibility (DE) bit. However, the

router does not support setting the DE bit in Cisco IOS Release 12.3(7)XI and later releases.

headers marked

Cisco 10000 Series Router Quality of Service Configuration Guide

Restrictions and Limitations for Marking

Required PRE

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