network problem

[Lennart Sorensen]

On Wed, Apr 08, 2009 at 01:16:38AM -0400, Jamon Camisso wrote:
> So I've run into a really strange network problem. Box X had IP Y. IP Y  
> was moved to box Z. Box X and Z are behind the same switch, and use the  
> same gateway. The switch is a 3Com 4400.
>
> The IP is accessible by any host behind the switch. But it only routes  
> properly when on box X. Box Z, no luck. I've tested iptables on box Z,  
> and disabled it just to be sure, no luck. Box Z also works with all the  
> other IPs it has assigned to it, that are on the same subnet as IP Y.
>
> I'm thinking it is an arp cache on the switch or router, but don't have  
> access to either to check. You can see where I'm going, how can I get  
> box Z to be accessible? Arp?

Did you disconnect Box X?  Did you give box X a new IP?

Can you ping the IP on box Z?

The switch shouldn't care about IP, only mac addresses.

Did you check the arp table on some other box on the network to see what
mac they think belongs to IP Y?

-- 
Len Sorensen
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