[ovs-discuss] tunctl tap device attached to openvswitch bridge, why the type changed to system interface
blp at nicira.com
Thu Nov 20 16:41:16 UTC 2014
On Thu, Nov 20, 2014 at 03:58:18PM +0800, zhangwqh wrote:
> I met a problem. I want to firstly create a tap device. I used the
> tool tunctl to create the tap device, After that, I attached the
> interface to openvswitch bridge. When check the type, the type is
> empty string.
That's fine and expected.
> From the man 5 ovs-vswitchd.conf.db,
> type: string
> The interface type, one of:
> system An ordinary network device, e.g. eth0 on Linux. Sometimes referred to as ''external interfaces'' since they are generally connected to hardware
> external to that on which the Open vSwitch is running. The empty string is a synonym for system.
Note the final sentence above.
> it seems that after attaching to bridge, the type is system
> type. Usually the physical ethernet port is system type. When I want
> to send the packets to vxlan device from the tap device I created
> using tunctl(I have set a flow entry from tap device to vxlan
> device), I found that the tap device dropped all of the packets. Can
> anybody give me some advices why this happens?
I don't know, because I don't have enough information, but the interface
type is not what you should focus on.
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