On Thu, Jun 18, 2015 at 02:19:40PM +0000, Stokes, Ian wrote:
> Hi All,
>
> I have been experimenting with Openvswitch and QoS. I have a question
> regarding how an existing QoS configuration on a port is removed.
>
> I setup QoS on an existing port with the following command
>
> sudo ovs-vsctl -- set Port $IF_NAME qos=@newqos -- \
> --id=@newqos create QoS type=linux-htb other-config:max-rate=4000000
> queues=0=@q0 -- \
> --id=@q0 create Queue other-config:min-rate=4000000
> other-config:max-rate=4000000
>
> This gives me the _uuid of both the QoS and Queue entry
>
> 0b62cfb0-c335-45ca-8910-ca4030ea13af
> 24ff16d8-926e-4c12-aad8-b7b06c6ec575
>
> When I send traffic I can see that QoS is indeed configured.
>
> I then remove the QoS configuration on the port with the following command
>
> sudo ovs-vsctl clear Port $IF_NAME qos
>
> I can see that QoS is no longer active on the port as the throughput is no
> longer being limited.
>
> However when I check the database to see if QoS has been removed the QoS
> table entry is still present along with the queue entry.
>
> sudo ovs-vsctl list qos
> _uuid : 0b62cfb0-c335-45ca-8910-ca4030ea13af
> external_ids : {}
> other_config : {max-rate="4000000"}
> queues : {0=24ff16d8-926e-4c12-aad8-b7b06c6ec575}
> type : linux-htb
>
> To remove these entries I have to complete an additional step as follows for
> both QoS and queue
>
> sudo ovs-vsctl -- destroy qos 0b62cfb0-c335-45ca-8910-ca4030ea13af
> sudo ovs-vsctl -- destroy queue 24ff16d8-926e-4c12-aad8-b7b06c6ec575
>
> Previously I assumed that clearing QoS from the port with my first command
> would automatically clear the database QoS entry as well but it would seem
> that this is not the case. Is this behavior expected?
>
> I have also seen similar behavior if I destroy the QoS record first. Although
> the record will no longer be in the database it seems that the port is still
> configured for QoS until I call clear Port $IF_NAME qos.
>
> Appreciate any insight on this.
This behavior is documented in ovs-ofctl(8). Search for "QoS" and
you'll find explanations and examples.
_______________________________________________
discuss mailing list
[email protected]
http://openvswitch.org/mailman/listinfo/discuss
