For mLDP, a policy can be assigned as an import policy only. Import policies only affect FECs arriving to the node, and do not affect the self-generated FECs on the node. The import policy causes the multicast FECs received from the peer to be rejected and stored in the LDP database but not resolved. Therefore, the show router ldp binding command displays the FEC but the FEC is not shown by the show router ldp binding active command. The FEC is not resolved if it is not allowed by the policy.
Only global import policies are supported for mLDP FEC. Per-peer import policies are not supported.
As defined in RFC 6388 for P2MP FEC, SR OS only matches the prefix against the root node address field of the FEC, and no other fields. This means that the policy works on all P2MP Opaque types.
The P2MP FEC Element is encoded as shown in Figure 1.
