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OVS with HyperV Integration with vxlan

asked 2016-01-14 08:49:32 +0300

shiva-m gravatar image

Hi, we are following this blog "" to integrate Openstack Cloud with OVS L2 agent on HyperV Compute. If we enable OpenVswitch Extension on HyperV Switch, the connectivity is lost between Controller and the Compute.

As far I know, for VXLAN, tunnel will be established between two endpoints which should be connected. In this example, and should be pingable.

options: {dfdefault="true", inkey=flow, localip="", outkey=flow, remote_ip=""}

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answered 2016-01-14 21:03:16 +0300

aserdean gravatar image


Could you paste more about your configuration. A good starting point would be the outputs of the following commands:

Get-VMSwitch *

Get-VMSwitchExtension *

ovs-vsctl show

ovs-dpctl show


Get-VMNetworkAdapter -ManagementOS

Get-Service ovs*

Thanks, Alin.

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Hi Alin, I have pasted output of commands which you requested here "" Please let me know if any other clarification required. Thanks Shiva

shiva-m gravatar imageshiva-m ( 2016-01-18 10:49:16 +0300 )edit

Hi Shiva, I have looked over your command outputs. For some reason you are missing the internal port. Could you please issue the following command and tell me if you have connectivity: ovs-vsctl add-port br-tun internal (ovs-vsctl.exe add-port br-tun internal in the blog post you mentioned above)

aserdean gravatar imageaserdean ( 2016-01-19 11:21:51 +0300 )edit

Hi Alin, Thanks for the reply. Yes, somehow it was not showing. Now I have done the setup afresh. I have pasted the output again. Please have a look at it. "" From the dump-flows, I could see that packets are going out from the tunnel endpoint, but not reaching the other.

shiva-m gravatar imageshiva-m ( 2016-01-19 13:30:46 +0300 )edit

Hi Shiva, You are correct packets are going through the endpoint. Can you do a tcpdump on the other host to verify it receives them. It can probably be a mismatch between the flows.Could you post me also the flows from the other endpoint(issue ovs-ofctl show <tunnel> please)?. Are you using neutron?

aserdean gravatar imageaserdean ( 2016-01-19 15:46:44 +0300 )edit

Hi Alin, Yes, I am using neutron. Last time forgot to paste dump-flows on the other end. Sometimes , If I do tcpdump on the Network Node adapter, keeps on sending ARP request to find other tunnel endpoint.(Compute Node side). Output pasted:,

shiva-m gravatar imageshiva-m ( 2016-01-20 13:53:30 +0300 )edit

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Asked: 2016-01-14 08:49:32 +0300

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Last updated: Jan 14 '16