[NTLUG:Discuss] How long are MAC addresses cached?

[David Stanaway]

It depends on the dynamic arp cache timeout setting, but 4 hours is
default per this article.

http://networkers-online.com/blog/2009/02/arp-caching-and-timeout/




Neil Aggarwal wrote:
> Hello:
>
> I moved an IP address to a different server than it
> was previously on.
>
> I can load view the website on that IP from another 
> server connected to the same switch as the new server, 
> but I can't view the website from my laptop connected
> via my ISP's wireless connection.
>
> I assume that is happening because the core routers
> are still using the previous MAC address instead of
> the new one.
>
> How long do they typically take to notice an update
> of the MAC address?
>
> Thanks,
> 	Neil
>
> --
> Neil Aggarwal, (281)846-8957, www.JAMMConsulting.com
> Will your e-commerce site go offline if you have
> a DB server failure, fiber cut, flood, fire, or other disaster?
> If so, ask about our geographically redundant database system.
>
>
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