[ovs-discuss] Output port of mirror drops packet

Ben Pfaff blp at nicira.com
Thu May 29 16:53:48 UTC 2014


On Thu, May 29, 2014 at 02:13:53AM +0000, Lichunhe wrote:
> 	I use the mirror function, if the port is configured as the
> output port of a mirror, it will can't send packages. Who knows the
> reason? Why does the output port drop packages?

It's documented:

       output_port: optional weak reference to Port
              Output port for selected packets, if nonempty.

              Specifying  a  port  for mirror output reserves that port exclu-
              sively for mirroring.  No frames other than those  selected  for
              mirroring via this column will be forwarded to the port, and any
              frames received on the port will be discarded.

              The output port may be  any  kind  of  port  supported  by  Open
              vSwitch.   It  may  be,  for example, a physical port (sometimes
              called SPAN) or a GRE tunnel.



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