Re: IX ARP Timeout

[sthaug () nethelp no]

> 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. 

As far as I know 4 hours has been the Cisco IOS default for many years.
So you'll find millions of routers around the world with that value. I
agree that it may be excessive in some situations.

Steinar Haug, Nethelp consulting, sthaug () nethelp no