Internet routing table "completeness" monitoring?
jra at baylink.com
Wed Oct 3 13:47:18 UTC 2012
----- Original Message -----
> From: "ML" <ml at kenweb.org>
> Has anyone put in place a method to identify if one their BGP peers
> suddenly withdraws X% of their prefixes?
> e.g I should expect ~420k prefixes in a "complete" routing table from
> a transit peer today. If suddenly I'm only getting 390k prefixes I'd
> guess a major network was depeered or similiar.
> If so how are people doing this? SNMP MIB, screen scrape?
Well, if I had to do it, I think I'd just point munin at the router, yes,
using SNMP, and put the prefix count graph up on the Big Wall, as a filled
curve. That thing jumps around, someone will likely notice.
This assumes a staffed NOC, of course, but it still gives you something to
look at historically if you note a problem in an unstaffed situation as well.
Jay R. Ashworth Baylink jra at baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII
St Petersburg FL USA #natog +1 727 647 1274
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