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Creating Policies to Control Label Allocation and Substitution for MPLS Ingress and AS Border Routers

In JUNOS Release 10.0 and later, you can control label-advertisements on MPLS ingress and AS border routers (ASBRs) on a per-route basis by specifying a label allocation policy using the allocation label-allocation-policy statement at the [edit routing-instances routing-instance-name routing-options label] hierarchy level. You can configure the label allocation mode as either per-nexthop or per-table.

Additionally, you can configure label substitution on a per-route basis by specifying a label substitution policy using the substitution label-substitution-policy statement at the [edit routing-instances routing-instance-name routing-options label] hierarchy level. The label substitution policy is used to determine whether or not a label should be substituted on an ASBR router. The results of the policy operation are either accept (label substitution is performed) or reject (label substitution is not performed). The default behavior is to accept.

For more details about allocating labels and creating substitution policies for MPLS ingress and ASBRs, see the JUNOS VPNs Configuration Guide.


Published: 2010-04-14

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