Usage Scenario
After mLDP P2MP is enabled in the MPLS-LDP view, to establish an inter-BGP-AS tunnel for multicast, run the mldp recursive-fec command to enable the mLDP P2MP service to span BGP AS domains.
Prerequisites
mLDP P2MP has been enabled.
Precautions
In an inter-AS mLDP scenario, if a device has both an IGP/static and a BGP route to the same root address:
(1) The device preferentially uses the IGP/static route to select an upstream (according to the longest match rule), and attempts to establish an intra-AS mLDP LSP. The attempt fails if the outbound interface of the route does not have an LDP session established.
(2) If the IGP/static route is not matched, the device uses the BGP route, and attempts to establish an inter-AS mLDP LSP.