From: Tarun Pahuja (pahujat@gmail.com)
Date: Mon Dec 03 2007 - 06:31:29 ART
Mike,
I doubt if their is any chart that has the exact numbers. The
number of routes in a routing table that an IGP can support is not solely a
property of IGP. Router horse power and memory play a role as well. IGP's
were not designed to carry 100,000 routes like BGP. Majority of the times
the router goes into ICU because of excessive flooding caused by IGP and or
excessive CPU utilization caused by SPF process.
However, Cisco gives you the power to control the number of routes you want
to accept in your routing table when redistributing from BGP into IGP to
protect the router from going to ICU ;-)
http://www.cisco.com/warp/public/459/bgp-maximum-prefix.html
HTH,
Tarun
On 12/3/07, ccie ccie <cciefun@gmail.com> wrote:
>
> Hi,
>
> Do any one having good comparision or chart which shows how many routes
> the IGP & EGP routing protocol ( IS-IS not CCIE topic but must to know for
> me) hapily carries, before they go to ICU (Intensive Care Unit -:)
>
> If this depend on router memory then why router crashes when accidenty we
> redistribute BGP to IGP.
>
> Regards,
> Mike
>
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