Getting pretty close to default IPv4 route maximum for 6500/7600 routers.

Wed Jun 11 05:14:34 UTC 2014

FIB is not the same as RIB...

Perfectly happy 6509, many paths, only one full table in the FIB:

BGP router identifier XXX , local AS number 11404
BGP table version is 40916063, main routing table version 40916063
494649 network entries using 71229456 bytes of memory
886903 path entries using 70952240 bytes of memory
29 multipath network entries and 58 multipath paths

-----Original Message-----
From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Tony Wicks
Sent: Tuesday, June 10, 2014 6:45 PM
To: 'nanog'
Subject: RE: Getting pretty close to default IPv4 route maximum for 6500/7600 routers.

My 2c:
The obvious thing for me is if people are running a full ipv4 route table on a box only just capable of handling one single table of that size, then really now is the time to asses if you really need to hold that table or just drop to default +internal+peers. If you have multiple up streams and you are using the route tables to do your route selection then great, but that means you need at least 1M capability now, and really 2+ should be your target. In my experience people running a full table on a small capability box normally don't actually need to carry it, or they just need a bigger box.