From: Sachin (ccie4sachin@gmail.com)
Date: Sat Apr 28 2007 - 15:18:14 ART
Hi Scott,
Thanks for the clarification. I had come across some conflicting
documentation. Now all of that make some sense.
-Sachin Shenoy
On 4/28/07, Scott Morris <smorris@ipexpert.com> wrote:
>
> The RFC is noticeably unhelpful for this, but the bottom line is that it
> depends what you are trying to accomplish!
>
> Remember that the loop-prevention mechanisms of BGP will kill routes that
> have the same cluster-id in them. Obviously you can overcome this with
> the
> use of separate cluster-id's on each (current recommended practice).
>
> Ask yourself though what happens when things fail? Obviously with the
> failure of an RR will be overcome by having more than one. But what
> happens
> when one link from an RR to one client fails? Will anyone get routes
> still?
> Sure, because you have other route reflectors. So will you gain anything
> by
> having them peer together?
>
> You may end up messing up your path selection process (all things being
> equal, paths are chosen based on lowest cluster-id then lowest router-id).
> So look at your network plan and routing plan and that will help answer
> your
> question!
>
> There isn't necessarily any right or wrong answer. Just whatever
> accomplishes your desires is best! Play around with things though, and
> see
> if there are any noticeable difference in your test lab route choices.
>
> HTH,
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
> #153, CISSP, et al.
> CCSI/JNCI-M/JNCI-J
> IPexpert VP - Curriculum Development
> IPexpert Sr. Technical Instructor
> smorris@ipexpert.com
> http://www.ipexpert.com
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Sachin
> Sent: Saturday, April 28, 2007 11:52 AM
> To: Cisco certification
> Subject: Route Reflector
>
> Hi All,
>
> If there are multiple RR in an AS, is it mandatory for them to be in full
> mesh ? I have checked the RFCs but I haven't got the clarity on this.
>
> Thanks in advance,
>
> - Sachin Shenoy
>
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