arp reply is not processed

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http://serverfault.com – My eth0 interface does not process a legitimate arp reply. When I try to ping a host, I see arp request and reply with tcpdump from the host I try to ping from, but ip neigh says that there is a failure. This has to do something with my bridge configuration, set up by quantum. I experience this when I have the following in /etc/network/interfaces: auto eth0 iface eth0 inet dhcp I do get an IP in this case (its My ifconfig output: eth0 Link encap:Ethernet HWaddr 00:9c:02:aa:65:75 inet addr: Bcast: Mask: inet6 addr: f (HowTos)