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CoS Features and Limitations on IQ2 and IQ2E PICs (M Series and T Series)

 

This topic describes CoS scaling and performance parameters that apply to IQ2 and IQ2E PICs on M series and T series routers.

Classification

Behavior aggregate (BA) classification is done on the PIC. There are eight classifier tables of each type (ieee-802.1p, mpls-exp, inet-precedence, dscp, and dscp-ipv6) supported per PIC.

For each classifier type, one table is reserved for a default classifier. This table is used when no classifier is configured, or when the number of tables configured exceeds eight.

The following restrictions apply:

  • You can only use BA classifiers for IPv4 DSCP bits for virtual private LAN service (VPLS).

  • You cannot use BA classifiers for IPv4 DSCP bits for Layer 2 VPNs.

  • You cannot use BA classifiers for IPv6 DSCP bits for VPLS.

  • You cannot use BA classifiers for IPv6 DSCP bits for Layer 2 VPNs.

Rewrite Operations

802.1p or 802.1ad rewrite operations are done on the PIC. A total of eight rewrite markers of each type are supported on the PIC. For other rewrite operations, the numbers are the same as for any other M series FPCs. See CoS Features and Limitations on M Series and T Series Routersfor details.