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[mininet-discuss] flow-entries that send packets back to the income port
murphy.mccauley at gmail.com
Wed Jan 28 12:02:11 PST 2015
It depends on how you're communicating with the switch. If you're using OpenFlow, you set the port for the output action to the constant OFPP_IN_PORT. If you're using the OVS command tool ovs-ofctl, I think there's an "in_port" pseudo-action which you'd use instead of the output action (see the manual of ovs-ofctl).
On Jan 28, 2015, at 6:06 AM, zhang fu <zhang.f.fu at gmail.com> wrote:
> Hi Murphy,
> Thanks for your reply. I'm using Openflow and OVS for the simulations. Could you help me with more information about how to use the virtual port to do that.
> How to form the command to the virtual switch to setup the flow rules to forward the packets to the input port?
> 2015-01-28 8:29 GMT+01:00 Murphy McCauley <murphy.mccauley at gmail.com>:
> You didn't specify how you're adding table entries, but I am guessing it uses OpenFlow. OpenFlow specifically defines this as being the correct behavior -- packets won't go back out the input port. There's a special virtual port if you actually want to do this.
> -- Murphy
> On Jan 27, 2015, at 2:52 AM, zhang fu <zhang.f.fu at gmail.com> wrote:
> > Hi,
> > I met some strange problem, that I tried to send packets back to the incoming port of a switch.
> > e.g. in_port=1, actions=output:1
> > it seems that when the switch receives packets from port 1, it indeed matches the packets to that rule, but it does not really send the packets out of port 1.
> > Does anyone have that problem before, or the in_port should be different from the out port in OVS?
> > Thanks,
> > Zhang
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