Peers - Avaya 8800 Planning And Engineering

Ethernet routing switch, network design
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Multicast network design
Figure 84: MSDP operation between peers
MSDP routers cache SA messages by default. The cache reduces join latency for new
receivers and reduces storms by advertising from the cache at a period of no more than twice
for the SA advertisement timer interval and not less than once for the SA advertisement period.
The SA advertisement period is 60 seconds.

Peers

Configure neighboring routers as the MSDP peers of the local router to explicitly define the
peer relationships. You must configure at least one peer. MSDP typically runs on the same
router as the PIM-SM RP. In a peering relationship, the MSDP peer with the highest IP address
listens for new TCP connections on port 639. The other side of the peer relationship makes
an active connection to this port.
Default peers
Configure a default MSDP peer when the switch is not in a BGP-peering relationship with an
MSDP peer. If you configure a default peer, the switch accepts all SA messages from that peer.
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Planning and Engineering — Network Design
November 2010

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