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Applying a Classifier to a Logical Interface

You can apply the classification map to a logical interface by including the classifiers statement at the [edit class-of-service interfaces interface-name unit logical-unit-number] hierarchy level:



[edit class-of-service interfaces interface-name unit logical-unit-number]

classifiers (dscp | dscp-ipv6 | exp
| ieee-802.1 | inet-precedence) (classifier-name | default);

You can use interface wildcards for interface-name and logical-unit-number.

For most PICs, if you apply an IEEE 802.1p classifier to a logical interface, you cannot apply non-IEEE classifiers to other logical interfaces on the same physical interface. This restriction does not apply to Gigabit Ethernet IQ2 PICs.

There are some restrictions on applying multiple BA classifiers to a single logical interface. Table 25 shows the supported combinations, by platform.

Table 25: Logical Interface Classifier Combinations by Platform

Classifier Combinations	Gigabit Ethernet IQ2 PICs	Other PICs on T-series, MX-series, and M320	Other M-series with Regular FPCs	Other M-series with Enhanced FPCs
dscp and inet-precedence	No	No	No	No
dscp-ipv6 and (dscp \| inet-precedence)	Yes	Yes	No	No
exp and ieee 802.1	Yes	No	No	No
ieee 802.1 and (dscp \| dscp-ipv6 \| exp \| inet-precedence)	Yes	No	No	Yes
exp and (dscp \| dscp-ipv6 \| inet-precedence)	Yes	No	No	Yes

For Gigabit Ethernet IQ2 interfaces, IEEE 802.1p classifiers are evaluated after other BA classifiers. For example, if you configure a logical interface to use both an MPLS EXP and an IEEE 802.1p classifier, the EXP classifier takes precedence. MPLS-labeled packets are evaluated by the EXP classifier, and all other packets are evaluated by the IEEE 802.1p classifier. The same is true about other classifiers when combined with IEEE 802.1p classifiers on the same logical interface.

Note: If an interface is mounted on an M-series FPC, you can apply only the default exp classifier. If an interface is mounted on an enhanced FPC, you can create a new exp classifier and apply it to an interface.

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