Configuring Msdp; Msdp Peers - HP A6600 Configuration Manual

Configuring MSDP

For more information about the concepts of DR, BSR, C-BSR, RP, C-RP, SPT, and RPT mentioned in this
document, see
Multicast source discovery protocol (MSDP) is an inter-domain multicast solution that addresses the
interconnection of protocol independent multicast sparse mode (PIM-SM) domains. It discovers multicast
source information in other PIM-SM domains.
In the basic PIM-SM mode, a multicast source registers only with the RP in the local PIM-SM domain, and
the multicast source information about a domain is isolated from that of another domain. As a result, the
RP obtains the source information only within the local domain and a multicast distribution tree is built
only within the local domain to deliver multicast data from a local multicast source to local receivers.
MSDP enables the RPs of different PIM-SM domains to share their multicast source information, so that the
local RP can join multicast sources in other domains and multicast data can be transmitted among
different domains.
With MSDP peer relationships established between appropriate routers in the network, the RPs of
different PIM-SM domains are interconnected with one another. These MSDP peers exchange source
active (SA) messages, so that the multicast source information is shared among these different domains.
MSDP is applicable only if the intra-domain multicast protocol is PIM-SM and is relative only for the ASM
model.

MSDP peers

Configuring one or more pairs of MSDP peers in the network forms an MSDP interconnection map, where
the RPs of different PIM-SM domains are interconnected in series. An SA message sent by an RP and
relayed by these MSDP peers can be delivered to all other RPs.
Figure 50 Where MSDP peers are in the network
As shown in
PIM-SM routers that assume different roles function differently.
MSDP peers on RPs include the following types:
"Configuring PIM."
Figure 50, an MSDP peer can be created on any PIM-SM router. MSDP peers created on
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