No need to reboot it.  Simply flush the neighbor cache.

Scott root # ip neigh flush help
Usage: ip neigh { add | del | change | replace } { ADDR [ lladdr LLADDR ]
          [ nud { permanent | noarp | stale | reachable } ]
          | proxy ADDR } [ dev DEV ]
       ip neigh {show|flush} [ to PREFIX ] [ dev DEV ] [ nud STATE ]

David

Gene Heskett wrote:

>On Sunday 25 July 2004 05:50, Henrik Nordstrom wrote:
>  
>
>>On Thu, 22 Jul 2004, Gene Heskett wrote:
>>    
>>
>>>I can ping the firewall, and I can ssh into it, so that part of
>>>the network is fine, I just cannot get past iptables in the
>>>firewall when eth0 is the nforce hardware, which has a different
>>>MAC address.
>>>      
>>>
>>Have you verified that the routing got correctly set up on the new
>>box?
>>
>>  ip ro ls
>>
>>The usual cause to the symptoms you describe is that the default
>>route has gone missing or is invalid.
>>    
>>
>
>The routing was good, showing the fireall as the default gateway 
>address.
>
>In this case, the fix was to reboot the firewall so that its arp 
>tables got refreshed to match the new MAC address of the onboard 
>nforce (forcedeth) nic.  Once that was done, everything was peachy.
>
>Thanks, I appreciate the reply, Henrik.
>
>  
>