From: Narbik Kocharians (narbikk@gmail.com)
Date: Tue Jun 26 2007 - 20:41:55 ART
I think he means MSDP/anycast
On 6/26/07, Scott Morris <swm@emanon.com> wrote:
>
> The idea for MSDP has nothing to do with failover. What it has to do with
> is that while both RPs are up and going, half of your network goes to one,
> the other half to the other one. That means that one half of your network
> knows nothing about multicast sources on the other half, and vice-versa.
>
> With MSDP, it will exchange the multicast group/source information so that
> everyone knows about everything.
>
> HTH,
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
> #153, CISSP, et al.
> CCSI/JNCI-M/JNCI-J
> VP - Technical Training - IPexpert, Inc.
> IPexpert Sr. Technical Instructor
>
> A Cisco Learning Partner - We Accept Learning Credits!
>
> smorris@ipexpert.com
>
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> http://www.ipexpert.com
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> johngibson1541@yahoo.com
> Sent: Tuesday, June 26, 2007 4:46 PM
> To: ccielab@groupstudy.com
> Subject: if we just want to have a backup RP, is MSDP needed ?
>
> I know MSDP application AncastRP can be used to backup RP.
>
> I have experimented using 2 loopback interfaces in 2 routers to backup
> each
> other as the RP address using 1 single IP address.
>
> I don't use any MSDP , I have no problem switching over from
> 1 RP to another.
>
> I know univrecd says the AncastRP application has no effect on those
> receiver-source pairs that are actively receiving/sending data because
> they
> are using shortest trees and RP is irrelevant.
>
> So, in my experiment, I stop the receiver as primary RP fails in purpose
> just to see receiving leaf router triggering (*,G) toward RP from scratch.
> It works fine.
>
> univercd says MSDP is good for monitoring continuously active source.
>
> My source is actively sending data throughout entire experiment too.
>
> I don't understand why we need MSDP for this purpose.
>
> I know there must be some subtle difference MSDP brings I just don't
> understand.
>
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-- Narbik Kocharians CCIE# 12410 (R&S, SP, Security) CCSI# 30832
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