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I was the person with issues with 10's of l3-agents not working
properly on Liberty.  With about 100 l3-agents we had issues with them
just falling over without anything going on.  We moved to 20 l3-agents
and with that config we've had good luck unless you restart all of
them at the same time.  My understanding is that in Liberty there is a
single thread per neutrons-server (we run 3) that handles agent
traffic and that this was supposed to be fixed in Mitaka and newer,
but I haven't seen that confirmed.

On Tue, Nov 1, 2016 at 4:38 PM, Leon Zachery (lzachery)
<lzachery at cisco.com> wrote:
> Hi:
>
> At the neutron operator feedback session during the operator summit [1] and
> the operator feedback session during the design summit [2], 2 issues were
> raised on which
> we’d like to get some further clarification.
>
> The first issue was the issue raised on the scale issues with thousands of
> agents, from [1] above:
>
> Issues with lots of agents (~1000) and rabbitMQ
>
> We've had problems on liberty with 10's of l3-agents, supposed to be better
> on mitaka+
>
> Related to this bug: https://bugs.launchpad.net/mos/+bug/1494416
>
>
> The second issue is the hardware router integration issue, from [2] above:
>
> Enabling end users to create their own networks serviced by a hardware
> router
>
> Currently using provider networks, but that loses self service
>
>
>
> [1] https://etherpad.openstack.org/p/BCN-ops-neutron-pain-points
> [2]
> https://etherpad.openstack.org/p/ocata-neutron-end-user-operator-feedback
>
> Feel free to unicast or broadcast a response and I will follow up with you.
>
> Thanks,
> Leon
>
>
>
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