nanog mailing list archives
Re: Internet routing table "completeness" monitoring?
From: "Justin M. Streiner" <streiner () cluebyfour org>
Date: Wed, 3 Oct 2012 14:21:37 -0400 (EDT)
On Wed, 3 Oct 2012, Christopher Morrow wrote:
is a threshold helpful here? (well, it's helpful to a point at least) what if your neighbour starts deaggragating (or sending you their internal deaggragates) in place of 50k real routes? no alarm, no 'change' from a numbers perspective, but certainly a traffic shift and reach-ability change :(
As long as you have some control over the number of polling intervals between the detection of a noteworthy change and sending an alarm. Otherwise, there is a real danger of your NOC having to investigate a lot of noisy alerts. If that persists for too long, the NOC will grow tired of responding to these alerts, and send them all to the bit bucket, or implement their own polling thresholds that meet their needs more effectively.
If a network you have no business relationship with and several AS hops away from you goes away, how much effort do you want to expend investigating that? That probably depends on your customers. If you see a few hundred routes disappear and determine them to be for an ISP on the other side of the planet, that's one thing. If your view of something like Google or Facebook suddenly disappears, that could be another thing entirely ;)
Isn't a speed-of-change threshold also interesting here?
+1 on that :) jms
Current thread:
- Internet routing table "completeness" monitoring? ML (Oct 02)
- Re: Internet routing table "completeness" monitoring? Saku Ytti (Oct 02)
- Re: Internet routing table "completeness" monitoring? Jay Ashworth (Oct 03)
- RE: Internet routing table "completeness" monitoring? Joseph Jackson (Oct 03)
- RE: Internet routing table "completeness" monitoring? Eric Tykwinski (Oct 03)
- Re: Internet routing table "completeness" monitoring? Christopher Morrow (Oct 03)
- Re: Internet routing table "completeness" monitoring? Justin M. Streiner (Oct 03)
- RE: Internet routing table "completeness" monitoring? Eric Tykwinski (Oct 03)
- Message not available
- RE: Internet routing table "completeness" monitoring? Joseph Jackson (Oct 03)
- RE: Internet routing table "completeness" monitoring? William F. Maton Sotomayor (Oct 03)
- Re: Internet routing table "completeness" monitoring? Andrew Gallo (Oct 03)