nanog mailing list archives
Re: Route table growth and hardware limits...talk to the filter
From: Nathan Ward <nanog () daork net>
Date: Sun, 9 Sep 2007 02:46:20 +1200
On 8/09/2007, at 3:45 PM, Leo Bicknell wrote:
In a message written on Fri, Sep 07, 2007 at 07:14:01PM -0400, Jon Lewis wrote:For some reason, today I started out with fewer routes (228289...yesterday,I started with 230686) with no filtering. RIR filter section Reduction in routes APNIC 16690 ARIN 41070 RIPE 16981 LANIC 4468 AFRINIC 1516 ----------------------------- TOTAL 80725 The end result of applying all the RIR minimum allocation filters was147564 BGP routes. I haven't checked to make sure there was no loss inreachability...this is just an idle 7206/NPE225 with nothing but its ethernet uplink.The CIDR report states that we have 235647 routes that could be aggregated to 154503 routes. While not the same metric, I'd be surprised at 147,564 routes if you did not have reachability issues.
The difference is roughly 3% of the total prefixes. ((154503-147564)/ 235647*100)
It wouldn't be hard to run some form of netflow, and gauge the amount of traffic to those prefixes. If it's as insignificant as the number of prefixes, get/use a 0/0 route.
-- Nathan Ward
Current thread:
- Re: Route table growth and hardware limits...talk to the filter, (continued)
- Re: Route table growth and hardware limits...talk to the filter Jon Lewis (Sep 07)
- RE: Route table growth and hardware limits...talk to the filter Lincoln Dale (Sep 07)
- RE: Route table growth and hardware limits...talk to the filter Jon Lewis (Sep 08)
- RE: Route table growth and hardware limits...talk to the filter Lincoln Dale (Sep 09)
- Re: Route table growth and hardware limits...talk to the filter Jon Lewis (Sep 07)
- Re: Route table growth and hardware limits...talk to the filter William Allen Simpson (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Jared Mauch (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Adrian Chadd (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Joe Provo (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Stephen Sprunk (Sep 10)
- Re: Route table growth and hardware limits...talk to the filter bmanning (Sep 11)
- Re: Route table growth and hardware limits...talk to the filter Russ White (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Forrest (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Andrew - Supernews (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Forrest (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Joe Provo (Sep 09)
- Re: Route table growth and hardware limits...talk to the filter Forrest (Sep 09)
- Re: Route table growth and hardware limits...talk to the filter Stephen Sprunk (Sep 10)