[195688] in North American Network Operators' Group
Re: Max Prefix Out, was Re: Verizon 701 Route leak?
daemon@ATHENA.MIT.EDU (Job Snijders)
Sat Sep 2 03:12:35 2017
X-Original-To: nanog@nanog.org
In-Reply-To: <m2r2vpzs26.wl-randy@psg.com>
From: Job Snijders <job@instituut.net>
Date: Sat, 02 Sep 2017 07:05:41 +0000
To: Christopher Morrow <morrowc.lists@gmail.com>, Randy Bush <randy@psg.com>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Sat, 2 Sep 2017 at 05:41, Randy Bush <randy@psg.com> wrote:
> >>> i have 142 largish bgp customers, a large enough number that the number
> >>> of prefixes i receive from them varies annoyingly. how do i reasonably
> >>> automate setting of my outbound prefix limit?
> >>
> >> First, it seems you know the inbound so automating the outbound is
> simple
> >> arithmetic.
> >
> > I would have said the same... i ought to know high-water marks for your
> > inbound peer count(s), and can work out a +20% outbound...
>
> you just assumed that the transitive closure of everybody's cones
> implement and propagate count. ain't gonna happen.
I am not sure what the issue here is. If I can tell my peering partner a
recommended maximum prefix value for them to set on their side, surely I
can configure that same value on my side as the upper outbound limit.
Kind regards,
Job
