IX ARP Timeout

[Mike Hammett <nanog () ics-il net>]

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