Comment 2 for bug 1558237

ARP probe (src IP set to zero) sent from a VM is not considered as Grat ARP, resulting in ARP route being added and when entry times out and couldnt get re-resolved, this entry is removed. For an unknown reason, the same has happened for GW address, resulting in the GW route being removed. This add and delete happens with local_peer, which is the same used for GW route. So, while it doesnt have any impact for other routes, GW route is impacted.