Re: Mapping agent in auto-rp

great write up on multicast

http://www.netcraftsmen.net/resources/archived-articles/375-ip-multicast-and-pim-rendezvous-points.html

"Because the Auto-RP mapping agents use the highest RP for each group or
range, you can have redundant RP's. If the one with the highest address
fails, the next one will take over (after the cache hold time expires). If
you have redundant Auto-RP mapping agents, as long as they advertise the
same information, there is no problem. You do need to make sure candidate
RP's use a large enough scope to reach all the mapping agents."

On Wed, Sep 30, 2009 at 1:38 PM, Anantha Subramanian Natarajan <
anantha.natarajan_at_gravitant.com> wrote:

> Hi All,
>
> I have a question on auto-rp mapping agent.If there are 2 RPs advertising
> themself as RP for a group,the RP with highest IP address would be choosed
> as RP for that group(Please correct me if I am wrong) by mapping
> agent.Similarly is there a mechanism from whom the multicast domain
> router/switches would hear about the RP from(I mean from which mapping
> agent).Atleast when I labbed it up,it doesn't seems have correlation with
> highest ip address for which mapping agent would be source of information
> about RP for a group.
>
> Kindly clarify the same.
>
> Thanks for the assistance
>
> Regards
> Anantha Subramanian Natarajan
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
Garry L. Baker
"There is no 'patch' for stupidity." - www.sqlsecurity.com
Blogs and organic groups at http://www.ccie.net