[193375] in North American Network Operators' Group
Re: BGP Route Reflector - Route Server, Router, etc
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Fri Jan 13 08:23:11 2017
X-Original-To: nanog@nanog.org
Date: Fri, 13 Jan 2017 05:23:04 -0800
From: Leo Bicknell <bicknell@ufp.org>
To: nanog@nanog.org
Mail-Followup-To: nanog@nanog.org
In-Reply-To: <3E9C67DA261AC349B60FF3609F5E211D7D80357D@USI-2K10EX02-MT.usicorp.usinternet.com>
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In a message written on Thu, Jan 12, 2017 at 08:32:44PM +0000, Justin Krejc=
i wrote:
> I am working on some network designs and am adding some additional router=
s to a BGP network. I'd like to build a plan of changing all of the existin=
g routers over from full iBGP mesh to something more scalable (ie route ref=
lection).
You might want to better define "scalable". I don't know your
background or network so I can't guess. I can say I've seen
the inner workings of some large ISP networks with a lot of hosts
in iBGP that work fine, and then people with 5 routers try and
tell me they have a scaling problem.
What is your actual problem? Memory usage? Convergence time?
Configuring the sessions? Staff understanding of how it works?
> I am wondering if people can point me in the direction to some good resou=
rce material on how to select a good BGP route reflector design. Should I j=
ust dust off some 7206VXR routers to act as route reflectors?
This is a red flag to me, relative to the questions above.
The 7206VXR, even with an NPE-G2, is a 1.5Ghz Power PC with a paltry
2GB of DRAM. It was not speedy when new, being roughly equivilent
to the PowerPC G4 processors in Apple Laptops at the time. It is
approximately 8 times slower than a current iPhone. Seriously.
If convergence time is anything you care about, a 7206VXR is a very
bad choice. It may also run out of memory if you have a lot of
edges with full tables.
So what's the actual "scaling" problem?
--=20
Leo Bicknell - bicknell@ufp.org
PGP keys at http://www.ufp.org/~bicknell/
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