Instance Interface down

asked 2015-07-18 23:46:31 -0500

stacksam gravatar image


One of the VMs on an hypervisor ( qemu-kvm ) lost one of its interfaces. The "nova interface-list" command show the port state as "Down" .

Looking for some help in troubleshooting and get the port "ACTIVE"


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try rebooting to see if the network configuration gets pulled down via cloud-init.

omar-munoz gravatar imageomar-munoz ( 2015-07-21 15:37:20 -0500 )edit

I did reboot the instance but it won't see the interface eth1 and the cloud-init fails to setup the interface. I think there is something wrong at the Openvswitch/Neutron level. I can't seem to find what that is and how to enable the port.

stacksam gravatar imagestacksam ( 2015-07-21 16:56:01 -0500 )edit

can you do a neutron port-show on it and see if the admin state is down? please post the output of the port-show.

if it is down can you try something like neutron port-update 43c9ff00-07ce-4069-a734-4e6d5e795e6a --status ACTIVE

omar-munoz gravatar imageomar-munoz ( 2015-07-24 13:49:09 -0500 )edit

also try restarting the ovs agent.

omar-munoz gravatar imageomar-munoz ( 2015-07-24 13:52:45 -0500 )edit

Yes the port state is DOWN in port-show. I tried the "port-update" but it gave this error - Cannot update read-only attribute status

I restarted the OVS agent but no avail.

All other VMs on the same HV don't have this problem.

stacksam gravatar imagestacksam ( 2015-07-26 00:41:09 -0500 )edit