[ovs-discuss] Unable to add port to OVS Bridge.

Ben Pfaff blp at nicira.com
Wed May 6 16:02:50 UTC 2015

On Wed, May 06, 2015 at 03:19:48PM +0530, Sudipto Biswas wrote:
> We are using Openstack to deploy close to 1000 VMs.
> Around 5 of the deploys fail with the error:
> /
> //Unable to add port tap668d1203-84 to OVS bridge br-int: Operation not
> permitted/
> The ovs-vswitchd.log file shows:
> /
> //bridge|WARN|could not open network device tap668d1203-84 (No such device)/
> Same is seen during few restart operations on the VMs
> There are no additional logs in the ovs logs that would suggest anything
> related to this device.
> The OVS version being used here is OVS 2.0.0
> Any help on how to debug this issue and what might be causing this?

Usually that would mean that the tap had not been created at the point
the request to add the port was issued.

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