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[mininet-discuss] flow-entries that send packets back to the income port

Asaf Valadarsky asaf.valadarsky at mail.huji.ac.il
Tue Jan 27 23:46:04 PST 2015


Thanks Murphy, I didn't know that!

On Wed, Jan 28, 2015 at 9:32 AM, Murphy McCauley <murphy.mccauley at gmail.com>
wrote:

> On Jan 27, 2015, at 11:19 PM, Asaf Valadarsky <
> asaf.valadarsky at mail.huji.ac.il> wrote:
>
> Could you please provide some more details?
>
> In general shouldn't it cause a loop? because the one sending the packet
> to the switch on port 1 will send the packet again to port 1 and so on..
>
>
> Just a FYI...
>
> In general maybe, but there are certainly places where you want to do
> this.  For example, if you're forwarding between two different VLANs on the
> same port.  Or in many cases, if you disable the hairpin in the wireless
> driver, this is how you forward between two different wireless clients.
>
> -- Murphy
>
> Asaf
>
> On Tue, Jan 27, 2015 at 12:52 PM, 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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>>
>>
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