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Hi slawek,

As soon as you declare "l2population" in the  MD section of the config
file, it will be loaded by ML2 plugin. l2population MD will listen to
ML2 DB events and send RPC messages to ovs agent when needed.
l2population MD will not bind the port, ovs MD will.
By the way, you need to ad add the flag l2population in config file of
the agent.

just to be curious, what your MD which inherit from l2_pop MD is made for?

regards

Mathieu

On Mon, May 5, 2014 at 11:06 PM, Sławek Kapłoński <slawek at kaplonski.pl> wrote:
> Hello,
>
> Thanks for answear. Now I made my own mech_driver which inherits from l2_pop
> driver and it is working ok. But If I will set it as:
> "mechanism_drivers=openvswitch,l2population" than ports will be binded with
> ovs driver so population mechanism will be working in such network?
>
> Best regards
> Slawek Kaplonski
> slawek at kaplonski.pl
>
> Dnia poniedziałek, 5 maja 2014 00:29:56 Narasimhan, Vivekanandan pisze:
>> Hi Slawek,
>>
>> I think L2 pop driver needs to be used in conjunction with other mechanism
>> drivers.
>>
>> It only deals with pro-actively informing agents on which MAC Addresses
>> became available/unavailable on cloud nodes and is not meant for
>> binding/unbinding ports on segments.
>>
>> If you configure mechanism_drivers=openvswitch,l2population in your
>> ml2_conf.ini and restart your neutron-server, you'll notice that bind_port
>> is handled by OVS mechanism driver (via AgentMechanismDriverBase inside
>> ml2/drivers/mech_agent.py).
>>
>> --
>> Thanks,
>>
>> Vivek
>>
>>
>> -----Original Message-----
>> From: Sławek Kapłoński [mailto:slawek at kaplonski.pl]
>> Sent: Sunday, May 04, 2014 12:32 PM
>> To: openstack-dev at lists.openstack.org
>> Subject: [openstack-dev] [ML2] L2 population mechanism driver
>>
>> Hello,
>>
>> Last time I want to try using L2pop mechanism driver in ML2 (and openvswitch
>> agents on compute nodes). But every time when I try to spawn instance I
>> have got error "binding failed". After some searching in code I found that
>> l2pop driver have not implemented method "bind_port" and as it inherit
>> directly from "MechanismDriver" this method is in fact not implemented.
>> Is is ok and this mechanism driver should be used in other way or maybe
>> there is some bug in this driver and it miss this method?
>>
>> Best regards
>> Slawek Kaplonski
>> slawek at kaplonski.pl
>>
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>
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