[c-nsp] 2 full BGP feeds on 3750?...expanded

[Mark Tohill]

Hi Peter,
 
I may be digressing here, but on the subject of the validity of full BGP routes in relatively small SP environments, is there anything else apart from the obvious loss of granularity in moving from full feeds to a default? We are in a 'muti-homed to same provider' scenario.
 
Is there any strong argument to maintain these assuming CPU, memory are n't restricted?
 
Thanks,
Mark
 
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Message: 12
Date: Tue, 5 Sep 2006 22:51:22 +0200
From: Peter Salanki <peter.salanki at bahnhof.net>
Subject: Re: [c-nsp] 2 full BGP feeds on 3750?
To: Anton Kapela <tk at 5ninesdata.com>
Cc: cisco-nsp at puck.nether.net, jason evans <jevans24 at gmail.com>
Message-ID: <B532EF2F-832E-4C9F-84CD-C6A577F116E4 at bahnhof.net>
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I agree on that solution. I believe that the meaning of having full 
table in a small-sp environment is highly overrated, usually only a 
small part of the internet represents 60-90% of your traffic

Sincerely

Peter Salanki
Chief Network Engineer
Bahnhof AB (AS8473)
www.bahnhof.se
Office: +46855577132
Cell: +46709174932


5 sep 2006 kl. 22.40 skrev Anton Kapela:

>
>
>> Anybody successfully multi-homing using a 3750 with a full
>> BGP table from each provider? I'm thinking no, but ...
>
> On 3550/3750/$low_end_l3_switch you cannot ever hope to receive &
> install a full table of routes.
>
> With that said (and after eyeballing
> http://bgp.potaroo.net/rv-index.html for a while), you could probably
> put your switch into the 'routing' sdm profile (11k unicast l3 
> entries),
> filter all prefixes longer than /15 and probably not overflow the 
> tcam.
> This would get you some reasonable directivity (used loosely) toward
> your largest destination netblocks given your platform. Set a 0/0
> towards some upstream, and you're good to go.
>
> -Tk
>
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