Where is my dhcp traffic going?

asked 2015-07-27 20:22:08 -0600

tictactech gravatar image

updated 2015-07-28 09:54:17 -0600


  • host -> Compute Node (Juno)
  • VM1 on host -> Network node (Kilo)
  • VM2 on host -> Controller node (Kilo)

I am trying to diagnose a network connectivity issue on my Juno Compute host.

br-int looks okay as I see dhcp requests coming from the VM instance and then on the patch-tun interface (via a mirror interface).

br-tun however appears to be dropping the dhcp requests. Looking at the open flow rules I only see packets counts incrementing on one rule. If I read the rule right it looks like it redirects the traffic to table 22 which drops the packets. It seems to me the flows are not correct as it appears to missing rules to send packets to the output GRE tunnel.

ovs-ofctl dump-flows br-tun -> http://paste.openstack.org/show/405994/

Which process/config should I hone in on that drives the generation of those rules?

Any help appreciated.

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answered 2015-07-29 15:08:43 -0600

tictactech gravatar image

Found the problem, I was attempting to create the VM instances as the admin user instead of the demo user via the dashboard. After logging in as the demo user and creating/starting the instance, the missing open flow rules were present.

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Asked: 2015-07-27 20:22:08 -0600

Seen: 189 times

Last updated: Jul 29 '15