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IX ARP Timeout

Subject: IX ARP Timeout
From: nanog at ics-il.net (Mike Hammett)
Date: Wed, 27 Jan 2016 21:02:16 -0600 (CST)
In-reply-to: <1241933342.11429.1453949242033.JavaMail.mhammett@ThunderFuck>

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

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