Sounds like the datapath_type of the bridge you created is "system".
Since the kernel module is not loaded, it's failing to create the
bridge.  You want "netdev" if you're planning to stick with userspace.

Ethan

On Wed, Jun 6, 2012 at 7:18 PM, Dong Jin <[email protected]> wrote:
> 1. I am using the userspace mode of ovs. When I execute the following
> commands to start the ovs daemon, I got one error and one warning are
> shown below. It looks that the ovs daemon is started and able to
> perform learning switch functionality. Just want to check if I can
> safely ignore them due to the userspace mode of ovs?
>
> ovsdb-server --remote=punix:/usr/local/var/run/openvswitch/db.sock
> --remote=db:Open_vSwitch,manager_options --pidfile --detach;
> ovs-vsctl --no-wait init;
> ovs-vswitchd --pidfile --detach
>
> Jun 07 
> 06:01:39|00001|reconnect|INFO|unix:/usr/local/var/run/openvswitch/db.sock:
> connecting...
> Jun 07 
> 06:01:39|00002|reconnect|INFO|unix:/usr/local/var/run/openvswitch/db.sock:
> connected
> Jun 07 06:01:39|00003|dpif_linux|ERR|Generic Netlink family
> 'ovs_datapath' does not exist. The Open vSwitch kernel module is
> probably not loaded.
> Jun 07 06:01:39|00004|dpif|WARN|failed to enumerate system datapaths:
> No such file or directory
>
> 2. I applied the following rate limiting rules (no error is shown
> after executing the commands),  but the rate limiting does not work. I
> can send 100 Mb/s traffic from one host to another. just wondering if
> it is because the userspace mode does not support QoS?
>
> ovs-vsctl set Interface tap0 ingress_policing_rate=1000
> ovs-vsctl set Interface tap0 ingress_policing_burst=100
>
> my topology
> VM1 (eth0) --- (eth0) VM2 (eth1) --- (eth0)VM3
> the ovs needs to run inside VM2 for some reason of our project.
> The virtualization technology I used is OpenVZ, which is a OS-level
> virtualization. Therefore, I am not able to load any kernel module in
> VM, and I choose to run userspace mode of ovs.
>
> Thank you for your help.
> _______________________________________________
> discuss mailing list
> [email protected]
> http://openvswitch.org/mailman/listinfo/discuss
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