Default Behavior Aggregate Classification

The software automatically assigns an implicit default IP precedence classifier to all logical interfaces.

If you enable the MPLS protocol family on a logical interface, a default MPLS EXP classifier is automatically applied to that logical interface.

Other default classifiers (such as those for IEEE 802.1p bits and DSCP) require that you explicitly associate a default classification table with a logical interface. When you explicitly associate a default classifier with a logical interface, you are in effect overriding the implicit default classifier with an explicit default classifier.

Note: Although several code points map to the expedited-forwarding (ef) and assured-forwarding (af) classes, by default no resources are assigned to these forwarding classes. All af classes other than af1x are mapped to best-effort, because RFC 2597, Assured Forwarding PHB Group, prohibits a node from aggregating classes.

The following sections describe the implicit and explicit default BA classifiers:

• Default IP Precedence Classifier (ipprec-compatibility)
• Default MPLS EXP Classifier
• Default DSCP and DSCP IPv6 Classifier
• Default IEEE 802.1p Classifier
• Default IEEE 802.1ad Classifier
• Default IP Precedence Classifier (ipprec-default)

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