[ovs-dev] [branch-2.3 V2] recirculation: Do not drop packet when there is no match from internal table.

[Andy Zhou]

It seems recirculation action should be scoped within the same OF-bridge.

On Tue, Dec 16, 2014 at 4:43 PM, Alex Wang <alexw at nicira.com> wrote:
> Hey Yamamoto,
>
> Justin and Ethan just raised the same question you asked,
>
> Yeah, there is an issue.  If say, the vlan is set before recirc action,
> the recirc'ed flow will have a vlan id which could lead to totally
> different handling result,
>
> We will discuss further and address it,
>
> Thanks,
> Alex Wang,
>
> On Tue, Dec 16, 2014 at 4:16 PM, YAMAMOTO Takashi <yamamoto at valinux.co.jp>
> wrote:
>>
>> hi,
>>
>> > Hey Yamamoto,
>> >
>> >
>> >> what will happen if the receiving bridge also has a bond port?
>> >>
>> >> YAMAMOTO Takashi
>> >>
>> >
>> >
>> > For each 'balance-tcp' bond, it will have a unique 'recirc_id'.
>> >
>> > If the receiving bridge has a 'balance-tcp' bond with recirc_id=ABCD,
>> > the bridge's internal table (Table 254) will contain flows matching on
>> > this one 'recirc_id' and different 'dp_hash' values.
>> >
>> > If the flow miss does not have 'recirc_id' (i.e. recirc_id == 0), lookup
>> > will
>> > start from Table 0.
>> >
>> > If the flow miss has 'recirc_id' == ABCD, it will match one of the rules
>> in
>> > internal table and get output to the corresponding interface.
>> >
>> > If the flow miss has 'recirc_id' != ABCD, it will match the the rule in
>> bold
>> > below, then lookup from Table 0, continue on the pipeline until reaching
>> > the bridge with the 'recirc_id'.
>> >
>> > priority=2,recirc_id=0,actions=drop
>> > *priority=1,actions=resubmit(,0)*
>>
>> thank you for explanation.
>>
>> i have another question: what ensures that the recirculated packet
>> reaches to the same bridge as before?  esp. when the packet has
>> been modified.
>>
>> YAMAMOTO Takashi
>>
>> >
>> > Thanks,
>> > Alex Wang,
>> > _______________________________________________
>> > dev mailing list
>> > dev at openvswitch.org
>> > http://openvswitch.org/mailman/listinfo/dev
>>
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