[j-nsp] MSDP

[Mohacsi Janos]

On Thu, 11 Aug 2005, Roberts, Michael J. (IATS) wrote:

> I have a multicast question for everyone.
>
>
>
> So I have two peering routers that are connected back to back over a
> GigE interface.  Each interface is configured with an IP address.  BGP
> is peering directly with the interfaces.  PIM is running on the
> interfaces, and the routers see each other as PIM neighbors.  Each
> router is configured with a loopback address.
>
>
>
> When MSDP is configured, should it be configured to peer with the
> neighbor's interface IP, or the loopback IP, or does it really make any
> difference?  Also, would it make a difference, if one side was
> configured to peer with the interface IP and the other side was
> configured to peer with the neighboring router's loopback?
>

Rule of thumb:
configure MSDP with the same address as you use for mBGP - except if you 
have non-congruent topology but beware MSDP RPF might fail....

See more:
http://archive.dante.net/nep/GEANT-MULTICAST/deployment-msdp.html

and RFC 3618

Regards,

Janos Mohacsi
Network Engineer, Research Associate
NIIF/HUNGARNET, HUNGARY
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