I am seeing duplicate ping packets when I ping an instance. This goes both ways...from the instance to the outside world and from the outside world to the instance.
root@openstackcloud1:~# ping 172.16.44.161 PING 172.16.44.161 (172.16.44.161) 56(84) bytes of data. 64 bytes from 172.16.44.161: icmp_req=1 ttl=64 time=1.37 ms 64 bytes from 172.16.44.161: icmp_req=1 ttl=64 time=1.44 ms (DUP!) 64 bytes from 172.16.44.161: icmp_req=2 ttl=64 time=0.796 ms 64 bytes from 172.16.44.161: icmp_req=2 ttl=64 time=0.822 ms (DUP!)
I noticed this bug: https://bugs.launchpad.net/nova/+bug/956474
And performed the ip link set brXXX promise off on both my controller and the instance...
I am running vSphere as my hypervisor and promiscuous mode is required on the vSwitch according to VMware documentation... If I turn it off traffic to my instance stops.