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Class of Service Functions in Transparent Mode Overview

 

Devices operating in Layer 2 transparent mode support the following class-of-service (CoS) functions:

  • IEEE 802.1p behavior aggregate (BA) classifiers to determine the forwarding treatment for packets entering the device

    Note

    Only IEEE 802.1p BA classifier types are supported on devices operating in transparent mode.

  • Rewrite rules to redefine IEEE 802.1 CoS values in outgoing packets

    Note

    Rewrite rules that redefine IP precedence CoS values and Differentiated Services Code Point (DSCP) CoS values are not supported on devices operating in transparent mode.

  • Shapers to apply rate limiting to an interface

  • Schedulers that define the properties of an output queue

You configure BA classifiers and rewrite rules on transparent mode devices in the same way as on devices operating in Layer 3 mode. For transparent mode devices, however, you apply BA classifiers and rewrite rules only to logical interfaces configured with the family ethernet-switching configuration statement.