HP VPN Firewall Appliances Network Management Configuration Guide

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Configuring MSDP
Overview
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. This allows multicast data to 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. MSDP is meaningful only for
the ASM model.
For more information about the concepts of designated router (DR), bootstrap router (BSR),
candidate-BSR (C-BSR), rendezvous point (RP), candidate-RP (C-RP), shortest path tree (SPT) and
rendezvous point tree (RPT) mentioned in this document, see Appendix Protocol References.
The term "router" in this document refers to both routers and routing-capable firewalls.
MSDP can be configured only at the CLI.
MSDP configuration task list
Task Remarks
Configuring basic MSDP
functions
Enabling MSDP Required.
Creating an MSDP peer connection Required.
Configuring a static RPF peer Optional.
Configuring an MSDP peer
connection
Configuring MSDP peer description Optional.
Configuring an MSDP mesh group Optional.
Configuring MSDP peer connection control Optional.
Configuring SA message
related parameters
Configuring SA message content Optional.
Configuring SA request messages Optional.
Configuring SA message filtering rules Optional.
Configuring the SA cache mechanism Optional.