Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 
 

Classifiers and Rewrite Rules at the Global, Physical, and Logical Interface Levels Overview

Depending on your platform, CoS supports classification and rewrite at the global, physical, and logical interface levels.

At a global level, depending on your platform, you can define EXP classification.

At a physical and logical interface level, depending on your platform, you can define the following features:

  • DSCP, DSCP-IPV6, and IPv4 precedence classifiers

  • DSCP, DSCP-IPV6, and IPv4 precedence rewrites

  • EXP classifiers

  • EXP rewrites

  • IEEE 802.1p and IEEE 802.1ad classifiers (inner and outer)

  • IEEE 802.1p and IEEE 802.1ad rewrites (outer)

The IEEE 802.1ad classifier uses IEEE 802.1p and DEI bits together.

Note:

You cannot configure both IEEE 802.1p and IEEE 802.1ad classifiers together.

To configure global EXP classifiers, include the classfiers exp classifier-name statement at the [edit class-of-service system-defaults] hierarchy level.

To configure classifiers or rewrite rules at the physical interface, include either the classifiers statement or the rewrite-rules statement at the [edit class-of-service interfaces interface-name] hierarchy level.

To configure fixed classifiers or rewrite rules at the logical interface, include the forwarding-class fc or the rewrite-rules statement at the [edit class-of-service interfaces interface-name unit number] hierarchy level.

To configure EXP rewrite at the logical interface, include the [edit class-of-service interfaces interface-name unit number rewrite-rules exp rewrite-rule] statement.

To display classifiers configured under system-defaults, enter the show class-of-service system-defaults command.

To display classifiers and rewrite rules bound to physical interfaces, enter the show class-of-service interfaces interface-name command.

Platform-Specific Classifier Behavior

Use the following table to review platform-specific behaviors for your platforms.

Table 1: Platform-Specific Classifier Behavior

Platform

Difference

ACX6360

The ACX6360 router does not support L2 (IEEE802.1p and IEEE802.1ad) classifiers.

ACX7000 Series

  • ACX7000 Series routers support classifiers of all types (Inet-Prec/DSCP/DSCP-v6/EXP/IEEE-802.1p/IEEE-802.1ad) only at the logical interface level.

  • ACX7000 Series routers do not support global classifiers.

Platform-Specific Rewrite Rule Behavior

Use the following table to review platform-specific behaviors for your platforms.

Table 2: Platform-Specific Rewrite Rule Behavior

Platform

Difference

ACX6360

The ACX6360 router does not support rewrite rules.

ACX7000 Series

ACX7000 Series routers support rewrite rules of all types (Inet-Prec/DSCP/DSCP-v6/EXP/IEEE-802.1p/IEEE-802.1ad) only at the logical interface level.