All things related to multicast

[Jan Novak <>]

> Actually, that is a good question. I have to withdraw my estimate - it is 
> actually a count
> of the RP's with active SA's. I do not know how they count RP's, but I wonder
> if they are doing something similar. Our mbgp tables show routes to 321 
> Autonomous Systems -
> shouldn't basically all of those have RP's ?

No, as you say only RPs which originate a SA can be counted, the soft
you mention just dumps for some period SAs from router-to-WS MSDP
session into a file and just  "sort unique" on RP field is done. The number 
you
see can also be affected by the fact, that data is collected just for two 
minutes
(every 15 minutes), but most RPs send (or are amplified -)) SAs at least 
once per minute, so should
be alright.

Jan


Jan Novak
Cisco Systems
Advanced Networking Services EMEA
CCIE #2215

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