[97811] in North American Network Operators' Group
Re: Yahoo outage summary
daemon@ATHENA.MIT.EDU (Tony Tauber)
Mon Jul 9 12:06:49 2007
Date: Mon, 9 Jul 2007 09:05:37 -0700
From: Tony Tauber <ttauber@1-4-5.net>
To: Randy Bush <randy@psg.com>
Cc: Roland Dobbins <rdobbins@cisco.com>, Nanog <nanog@nanog.org>
In-Reply-To: <4691D62E.1000305@psg.com>
Errors-To: owner-nanog@merit.edu
On Mon, Jul 09, 2007 at 02:31:10PM +0800, Randy Bush wrote:
>
> > following existing BCPs with currently-deployed
> > techniques/functionality/features would have prevented the issue
> > described in the post.
>
> knowing that level(3) is one of the most serious deployments of
> irr-based route filters and other prudent practices, perhaps we should
> wait for a post mortem from level(3) before jumping to conclusions?
>
> randy
Level3's filter implmentation is indeed well-done, however, the fact
remains that the IRR (which I use and endorse) has no linkage to any
other source of information for purposes of validation.
It's fundamentally garbage in, garbage out.
Say some ISP has a provisioning tool which updates their router
configs and the IRR in one fell swoop. If the provisioner makes a typo
the IRR will gladly accept the entry for, say, 12/8, and the upstream
will rebuild their filters with that entry automatically and you get the
same result.
There's no magic bullet in updating BGP if a fundamental, verifiable
data model is not accepted and agreed upon.
Tony
