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Hi Kaz
    Thanks for your answer. But int the log, i can not find how to resolve
this issue. In fact ,this issue is not related with br-ex.
In OVS, the normal action add or remove vlan id when output the packet. So
we should add another rule that use in_port that
belongs to the same vlan with mirror port as rule condition  in br-int.



 Jimmy

2016-07-05 17:01 GMT+08:00 SUZUKI, Kazuhiro <kaz at jp.fujitsu.com>:

> Hi,
>
> I also have seen the same situation.
> The same issue is discussed at the IRC meeting of TaaS.
> Please take a look at the log.
>
>
> http://eavesdrop.openstack.org/meetings/taas/2016/taas.2016-04-13-06.30.log.html
>
> Regards,
> Kaz
>
>
> From: 张广明 <gmzhang76 at gmail.com>
> Subject: [openstack-dev] [neutron][taas] Taas can not capture the packet,
> if the two VM on the same host. Is it a Bug?
> Date: Fri, 1 Jul 2016 16:03:53 +0800
>
> > Hi ,
> >     I found a limitation when use taas.  My test case is descripped as
> > follow:
> >     VM1 and VM2 is running on the same host and  they are belong the
> vlan.
> > The monitor VM is on the same host or the  other host . I want to monitor
> > the only INPUT flow to the VM1.
> >     So I configure the tap-flow like this "neutron tap-flow-create
> --port
> > 2a5a4382-a600-4fb1-8955-00d0fc9f648f  --tap-service
> > c510e5db-4ba8-48e3-bfc8-1f0b61f8f41b --direction IN ".
> >     When ping from VM2 to VM1.  I can not get the flow in the monitor VM.
> >    The reason is the the flow from VM2 to VM1 in br-int has not vlan
> > information. The vlan tag was added in flow when output the packet  in
> OVS.
> > So the code in file ovs_taas.py did not work in this case .
> >
> >      if direction == 'IN' or direction == 'BOTH':
> >             port_mac = tap_flow['port_mac']
> >              self.int_br.add_flow(table=0,
> >                                  priority=20,
> >                                 dl_vlan=port_vlan_id,
> >                                 dl_dst=port_mac,
> >
> actions="normal,mod_vlan_vid:%s,output:%s" %
> >                                  (str(taas_id), str(patch_int_tap_id)))
> >
> >
> >
> >
> >  Is this is a Bug or a Design ??
> >
> >
> >
> > Thanks.
>
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