[187358] in North American Network Operators' Group
IX ARP Timeout
daemon@ATHENA.MIT.EDU (Mike Hammett)
Wed Jan 27 22:02:21 2016
X-Original-To: nanog@nanog.org
Date: Wed, 27 Jan 2016 21:02:16 -0600 (CST)
From: Mike Hammett <nanog@ics-il.net>
To: NANOG <nanog@nanog.org>
In-Reply-To: <1241933342.11429.1453949242033.JavaMail.mhammett@ThunderFuck>
Errors-To: nanog-bounces@nanog.org
So I'm looking at the policies, recommended configurations, etc. of other IXes. We try to model a lot of ourselves on what the Europeans do (even if we come up short in some areas). I was reading through the AMS-IX guide.
https://ams-ix.net/technical/specifications-descriptions/config-guide#3.1
They recommend a four hour ARP timeout. Thoughts? Seems a bit excessive, but I don't have over 700 networks on my IX. That said, I don't have over 700 members on my IX generating a ton of ARP traffic, so I'm probably fine recommending a smaller value.
I understand it's a balance between stale records and ARP volume. Just trying to gauge what the community thinks.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
Midwest-IX
http://www.midwest-ix.com
