[c-nsp] full routing table / provider-class chassis

[Ian MacKinnon]

Hi Gert,

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Gert Doering
> Sent: 11 June 2009 14:41
> To: Jo Rhett
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp

<SNIP>

> "XL" or "non-XL" has nothing to do with the number of *peers*.
>
> "XL" decides on the number of prefixes that you can have in your
> forwarding table (hardware FIB) - and this will be about the same for
> "1 peer with a full BGP Table" or "20 peers with the same set of
> prefixes but just different BGP paths".
>
> A higher number of different "full table "peers is going to eat up CPU
> memory and CPU power - memory is easy (Sup720-3CXL comes with 1Gbyte
> RAM, which is sufficient for at least 10 "full table" BGP peers), but
> CPU might reach its limit with 5 full table peers and 91 others.



I was the under the impression that the limit on these boxes (and ASR1002 R1) was approx 1 Million routes.
I had assumed that was the total number of routes from all your peers, eg we see about 280k routes in a full table, so that would be approx 4 full tables.
Are you saying that the limit on the number of routes, is actually in the FIB, ie active routes, so currently would always be about 280k, and multiple full tables is OK.


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