Applying MPLS EXP Classifiers to Routing Instances

When you configure the vrf-table-label statement, and you do not explicitly apply a classifier configuration to the routing instance, the default MPLS EXP classifier is applied to the routing instance.

For PICs that are installed on Enhanced FPCs, you can override the default MPLS EXP classifier and apply a custom classifier to the routing instance. Detailed instructions for this procedure are provided in the JUNOS Network Interfaces Configuration Guide. The following instructions summarize how to apply a custom classifier to a routing instance:

1. Filter traffic based on the IP header by including the vrf-table-label statement at the [edit routing-instances routing-instance-name] hierarchy level:

vrf-table-label;

2. Configure a custom MPLS EXP classifier by including the following statements in the configuration. See the JUNOS Network Interfaces Configuration Guide for information on how to do this.
3. Configure the routing instance for CoS by including the routing-instances statement at the [edit class-of-service] hierarchy level:

routing-instances routing-instance-name {

    classifiers {

        exp (classifier-name | default);

    }

}

4. Configure the routing instance to use the custom MPLS EXP classifier by including the classifiers statement at the [edit class-of-service routing-instances routing-instance-name] hierarchy level:

classifiers {

    exp classifier-name;

}

To display the MPLS EXP classifiers associated with all routing instances, issue the show class-of-service routing-instances command.

NOTE: The following caveats apply to custom MPLS EXP classifiers for routing instances: An Enhanced FPC is required. Logical routers are not supported.