[c-nsp] 3550 as a BGP Router

Tom Storey tom at snnap.net
Thu Sep 13 09:05:16 EDT 2007


Plug the 2610 into the 3550?

Or use a 16 port switch NM and plug your peers into that. Obviously limited
to 16 peers with the NM, but either way thats how you'd do it.

----- Original Message -----
From: "Jon Lewis" <jlewis at lewis.org>
To: "Adrian Chadd" <adrian at creative.net.au>
Cc: <cisco-nsp at puck.nether.net>
Sent: Thursday, September 13, 2007 2:14 AM
Subject: Re: [c-nsp] 3550 as a BGP Router


> On Thu, 13 Sep 2007, Adrian Chadd wrote:
>
> >> The ISP's would BGP peer and announce their own routes into it (<100)
and
> >> basically just take each others routes for a neutral peering situation.
> >>
> >> Would the 3550 handle that?  Number of routes here isn't an issue. but
the
> >> number of BGP sessions. what wise advice would people offer regarding
that?
> >
> > You could always try. That said, for like $200 could you pick up a 2610
> > or something similar off ebay as the route server and bypass the problem
> > entirely.
>
> How would you propose he connect a dozen ISPs to a 2610?
>
> I suspect the 3550 would work (EMI software required) as long as the
> number of BGP routes is kept low (he mentioned <100 routes...if that's the
> total for all peers combined, I don't see a problem).  The switch has the
> advantage of plenty of ports (which can be configured as layer 3 ports)
> capable of wire-rate...unlike the 2600 series.
>
> I've done iBGP and eBGP on a 3550, though this was only 2-3 peers and a
> handful of routes.  IIRC, the BGP command set on the 3550 is somewhat
> stripped down...but I can't remember exactly which features I think were
> missing.  I know from looking at the config, peer-groups, prefix-lists,
> and route-maps are supported.
>
> ----------------------------------------------------------------------
>   Jon Lewis                   |  I route
>   Senior Network Engineer     |  therefore you are
>   Atlantic Net                |
> _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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