From: Michael Zuo (mzuo@ixiacom.com)
Date: Wed Nov 22 2006 - 19:36:30 ART
Here is what I have in my notes, sort of a summary of what everyone
said, please correct me if anything is incorrect:
multiple ways of configuring backup RPs
1. auto-RP with multiple RPs, highest RP address wins
2. BSR with priority
3. auto-RP over static RP
4. anycast RP (same RP addresses on various routers connected via MSDP)
NOTE: item 1-3 can be used on top of item 4 because MSDP is separate
from how the RP is advertised
thanks
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Nick Griffin
Sent: Wednesday, November 22, 2006 10:47 AM
To: ccie anees
Cc: nisha rani; Cisco certification
Subject: Re: Backup for RP in multicasting
You can use the candidate RP priority in BSR to choose the highest and
have
multiple ip addresses. You can also have redundancy with AutoRP, but
there
is no priority switch. Highest loopback address wins, if a loopback
isn't
present, then highest ip address wins. When your talking about MSDP,
your
talking about anycast RP, which is when two RP's share the same loopback
address for an RP identifier, and that network is routed throughout the
domain as a /32 host route, therefore the devices contact RP's contact
the
closet RP. MSDP is then used to propogate the Registration/Receiver
messages
to the other RP in the form of MSDP SA messages.
On 11/22/06, ccie anees <ccieanees@yahoo.com> wrote:
>
> I am not sure about the Backup RP. But I have an idea:
>
> Configure the primary RP using auto-rp. and configure the backup RP
> statically.
> Dynamic RP will override the static RP. If the primary RP fails,
static
> RP (which is the backup RP) will take over. Not sure I am correct...
>
> nisha rani <nisharani1@googlemail.com> wrote:
> Anyone can provide link for configuring backup RP?
>
> Thanks
> Nisha
>
>
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