[70860] in North American Network Operators' Group
Re: Open Source BGP Route Optimization?
daemon@ATHENA.MIT.EDU (Sam Stickland)
Sat May 29 06:24:40 2004
From: "Sam Stickland" <sam_ml@spacething.org>
To: <nanog@merit.edu>, "Andrew - Supernews" <andrew@supernews.net>
Date: Fri, 28 May 2004 23:33:54 +0100
Errors-To: owner-nanog-outgoing@merit.edu
Andrew - Supernews <andrew@supernews.net> wrote:
>>>>>> "Per" == Per Gregers Bilse <bilse@networksignature.com> writes:
>
> Per> But that wasn't really the point. If I telnet to all border
> Per> routers and do 'sh ip b' I can get all tables too; likewise if I
> Per> have a starting point and do a lot of LS traceroutes; and maybe
> Per> even via SNMP (haven't checked what various MIBs support).
>
> You can get the received routes via SNMP. I've done this manually on
> occasion for the purposes of doing "what-if" analysis of potential
> traffic plans - take a dump of all available external routes via SNMP,
> apply to that the proposed policy with regard to selecting the best
> route, then correlate the resulting route choices with known traffic
> statistics to determine the resulting utilisation levels of each
> external link. This has proven useful in a number of situations where
> radical changes to external routing were being made, to avoid
> unexpectedly overloading particular links.
I would had liked to had been able to have done such things in the past. I
was thinking about having a go at writing something, but it's not like I
have enough time as it is, and our network isn't really big enough to
warrant it.
Though I am interested in what tools already exist to support this (more out
of curiousity than need). A quick google search threw up a couple of
research papers and IP/MPLSView (www.wandl.com), but I presume others on
this list will know of more?
Sam
