From: blodwick (blodwick@columbus.rr.com)
Date: Sat Feb 25 2006 - 10:50:24 GMT-3
I read a lot of good postings to the list, but don't submit very often
so I'll add my 2 cents here.
I would say as a good rule of thumb in the CCIE lab - if you have a
situation where your iBGP speakers are not fully meshed use route
reflection if you can, and confederation if you have to. The reason I
say this is because it is more complex to configure and test a
confederation. If the right answer is a confederation you will likely be
steered in that direction by the way the question is worded.
In the real world I would say you would probably opt for route
reflection until your network scaled so large that it required the
segmentation you achieve with a confederation. Once your IGP domain gets
large enough where you are reaching its scaling capabilities you might
opt to create a confederation. The advantage would be that you could
split up the extremely large single IGP domain into smaller domains and
just create these internal yet eBGP acting peering points between those
smaller domains. Usually you'd only see this in an ISP environment or an
extremely large enterprise environment. I would say this is the
traditional use for confederations. I'm sure there are several other
interesting scenarios where a confederation would be the right choice.
Brian L.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Umar Abanifi
Sent: Saturday, February 25, 2006 7:22 AM
To: ccielab@groupstudy.com
Subject: BGP Route reflector and Confederation
Hi Group,
First time asking question to the group but been follower for some time,
impressed by wealth of technical expertise on this group, can only say
keep
the momentum going.
Just wondering if all you kind people could ease my pain and explain
when
best to use BGP route reflection and confederation.
Understand RR and Confed is used to reduce the number of IBGP peering
but
how many number of peers would be present to consider either?
Have come across a scenarior where i stood still wondering which one do
i
use here, your explanation will be highly appreciated.
Umar
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