This section provides information about configuring and operating a MPLS forwarding policy using CLI.
There are two types of MPLS forwarding policy:
endpoint policy
label-binding policy
The endpoint policy allows the user to forward unlabeled packets over a set of user-defined direct or indirect next hops, with the option to push a label stack on each next hop. Routes are bound to an endpoint policy when their next hop matches the endpoint address of the policy.
The label-binding policy provides the same capability for labeled packets. In this case, labeled packets matching the ILM of the policy binding label are forwarded over the set of next hops of the policy.
The data model of a forwarding policy represents each pair of {primary next hop, backup next hop} as a group and models the ECMP set as the set of Next-Hop Groups (NHGs). Flows of prefixes can be switched on a per NHG basis from the primary next hop, when it fails, to the backup next hop without disturbing the flows forwarded over the other NHGs of the policy. The same can be performed when reverting back from a backup next hop to the restored primary next hop of the same NHG.