search for: subnet_compare_mac

...one node to another in the way you'd expect. It will add the MAC address to the new node, but will not remove it from the other. Until the address expires on the old node (or you restart it), I suspect packets will go to the first node in lexicographical name order (because that's just what subnet_compare_mac happens to use). After the MAC expires on the old node (10 minutes by default), things will go back to normal. You can verify that this is indeed what's causing your problem by setting MACExpire to a very low value. If you set it to 5 seconds, then it should only take 5 seconds for the MAC to...