oovs-ofctl queue-stats not show queues after adding link bandwidth on mininet

[Sofiane MESSAOUDI]

hi everyone ,

The problem is that after adding the link bandwidth on mininet, like that,
net.addLink(s1,s2 ,bw=5)
that I tried to check queue-stats but there was not queue on switch port,
but ovs-vsctl list qos and ovs-vsctl list queue these two commands still worked

If I delete the bandwidth on mininet, like that,
net.addLink(s1,s2)
that ovs-ofctl queue-stats is working again

I tried google this problem on mininet-discuss but seem to be no answer on it,
was there someone facing this problem before?

can anyone helps please?

Thanks 

Sofiane