[ovs-discuss] Output a Packet From Its Input Port

[Jeremias Blendin]

Hi Volkan,

if you want to send out a packet through its input port, you need
to specify that with a special port number:

OF Switch Specification 1.0, p. 18:

  OFPP_IN_PORT    = 0xfff8,  /* Send the packet out the input port.  This
                                  virtual port must be explicitly used
                                  in order to send back out of the input
                                  port. */

Best regards

Jeremias


2013/8/14 Volkan YAZICI <volkan.yazici at gmail.com>

> Hi,
>
> I have a simple topology as follows:
>
>  *s1* [p2] ------ [p2] *s2*
> [p1]                [p2]
>   |                   |
>  *h1*                  *h2*
>
> I push a flow to s2 to output every packet incoming from p2 to p2 itself
> again:
>
> $ ovs-ofctl add-flow s2 in_port=2,actions=output:2
>
> When I start to ping h2 from h1, I was expecting to observe PacketIns from
> p2 of s1 due to sent back PacketIns from p2 of s2, but somehow I did not in
> Wireshark. Is this something expected?
>
> Best.
>
> _______________________________________________
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>
>
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