[CentOS-virt] Xen domU default gateway missing/ARP table full

Ken Bass

kbass at kenbass.com
Thu Nov 19 15:03:05 UTC 2009

Pasi Kärkkäinen wrote:
> I usually specify the default gateway in
> /etc/sysconfig/network-scripts/ifcfg-eth0 and it works just fine.
Actually, I tried putting the GATEWAY in the specific ifcfg-eth0, as 
well as the global /etc/sysconfig/network and it seems to be ignored.
Of course things 'appear' to work just fine, but the route that is setup is

default         *              U     0      0        0 eth0


default         router.example.com         UG    0      0        0 eth0

The former seems to cause all arp entries to be queried and cached. The latter works correctly. 
Both 'appear to work'. Does the route on your domU look like the second entry?

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