[libvirt-users] "error: error creating bridge interface virbr0: Operation not supported" occurred what net-start default

[Michal Privoznik]

On 23.08.2015 07:20, chenhongzhen at zhicloud.com wrote:
> Hi, All!
> 
> I found a bug!
> When I start the default network, I got a error shown as below:
> 
> [root at localhost ~]# virsh net-start default
> error: Failed to start network default
> error: error creating bridge interface virbr0: Operation not supported
> 

I think it's caused by commit fc7b23db (released in 1.2.14). For some
reason, older kernels do not know how to create a bridge via netlink. I
wonder if we should workaround it somehow.

Michal