All things related to multicast

[Leonard Giuliano <>]

Most important thing about RP placement is probably just being able to 
handle the MSDP state and ensuring you have enough Anycast RPs to 
guarantee at least one is up at all times.  Having an RP in a 
well-connected, centrally-located place is always nice, but as you point 
out the RPT is usually very short-lived (typically only a few packets), so 
it's probably not the worst thing in the world if you aren't able to put 
it in the core.

One thing to also consider is that MSDP is a very dangerous protocol.  SA 
throttling knobs have dramatically decreased the risks of SA storms, but 
there is still a good amount of risk inherent to MSDP.  So many folks view 
MSDP as a protocol that they want to deploy on as few routers as necessary 
to deliver service.


-Lenny

On Fri, 5 Feb 2010, Laura Kristoff wrote:

-) Wondering if anyone has any advice on the best place to 
-) locate RP's.  We are currently using our core routers but
-) are considering moving them to our route reflectors.  We
-) are using anycast RP for both locally scoped groups and
-) global groups but different routers for local vs global.
-) 
-) The SPT seems to get built pretty quickly so not sure
-) what requirements we need beyond MSDP (for anycast RP)
-) and PIM and some amount of CPU.
-) 
-) --Laura
-) 
-) 
-) -- 
-) Laura Kristoff 
()
-) IT Telecommunications and Network Services
-) 312-503-4094
-) 
-)