Hello. Simple hack to try: log to the network node and go to network namespace of dhcp agent or router. Use ping6 to ff02::1 (with interface, f.e.: ping6 -I qr-bda2b276-72 ff02::1). If network is fine, you should receive reply from all nodes on the segment (link local ipv6 works without dhcp). And you can track down those requests over interfaces with tcpdump. On 03/26/2015 06:06 PM, raju wrote: > I have lost connectivity to all my instances and new instances does > not get IP from DHCP, I am getting below errors from ovs-agent > > > ov-agent log > > http://paste.openstack.org/show/196902/ > > ovs-vsct output for both compute nodes > > http://paste.openstack.org/show/196903/ > > TCP dump for br-int ex and eno2 for computenodes > > http://paste.openstack.org/show/196905/ > > Thanks > > > _______________________________________________ > OpenStack-operators mailing list > OpenStack-operators at lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20150326/fc11f927/attachment.html>