Transmitting Burst Multicast Data Between Domains

By default, an SA message carries only (S, G) information. Then, if burst multicast data need be transmitted between domains, you can configure multicast data encapsulation for an SA message on the source RP. In addition, you can set the TTL threshold to limit the transmission scope of multicast data encapsulated in an SA message.

Encapsulating a Multicast Data Packet in an SA message: By default, a Source Active (SA) message contains only (S, G) information, with no multicast data packets encapsulated. You can configure multicast data encapsulation for an SA message on the source Rendezvous Point (RP) configured with an MSDP peer.

(Optional) Setting the TTL Threshold for Forwarding an SA Message Containing a Multicast Data Packet: After receiving a Source Active (SA) message encapsulated with a multicast data packet, an MSDP peer forwards the SA message to a specified remote MSDP peer only when the TTL value of the multicast packet is greater than the set threshold.