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Hi all,

I have get this working this morning. The settings have no problem, but I
didn't get the order right on first try.

Here is the correct order:
1. create network resources, but do not connect them to router yet.
   create ext-net, net1/subnet1, net2/subnet2
2. create router1
3. config router_id in l3-agent1, restart l3-agent1
5. create router2
6. config router_id in l3-agent2, restart l3-agent2
7. add ports to the router, namely:
   run router-interface-add and router-gateway-set for router1;
   run router-interface-add and router-gateway-set for router2.

The key point is do not add any port to router until you have set router_id
in all l3-agents and restart them.

On first try, I have run router-gateway-set too early for router2.

Thanks Ageeleshwar, Gustavo for your advices.

To Gustavo: I set different router_id in different l3_agent.ini, that's the
whole point of this setup.

To Ageeleshwar: I am aware of that setup. Note however, in my setup, two
routers share the ext-net, they just use different l3-agent to do NAT. This
is a little different from using two ext-nets and two router. Because
neutron could not infer which l3-agent to use by the ext-net id when you do
router-gateway-set. I have tried two ext-net with two router setup before,
it works as expected. So that information should be helpful for others.
Make sure in gateway_external_network_id config, you should use uuid
instead of ext-net name though.



*YY Inc. is hiring openstack and python developers. Interested? Check
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--
Thanks,
Yuanle


On Thu, Mar 6, 2014 at 4:10 AM, gustavo panizzo <gfa> <gfa at zumbi.com.ar>wrote:

> you may want to look at this thread
>
> https://www.mail-archive.com/openstack@lists.openstack.org/msg03984.html
>
> is not what you ask for, but is the closest thing i've seen
>
> also check if your pkgs have this patch applied
>
> https://review.openstack.org/#/c/59359/
>
>
> On 03/05/2014 09:21 AM, sylecn wrote:
> >
> > I started two l3 agents on two nodes. In l3_agent.ini, I set one l3
> agent's
> > handle_internal_only_routers to False, I config router_id to be ids of
> > the two
> > routers. And neutron agent-list show both l3 agents are up.
> if you want to an L3 agent to serve just a single router, why put 2
> routers in router_id?
>
> >
> > Now when I boot instance with a port in subnet2, the traffic still go
> > through
> > the server that runs l3-agent1.
> do you have routers for subnet2 on both nodes?
> my bet is l3-agent1 created a router for subnet2, maybe it was started
> before l3-agent2
>
>
> PD: i'm not very experienced with nat router and gre, i use vlan and
> external networks
>
> >
> > My question is: is this kind of network supported by neutron? Does the
> > router_id config means the l3 agent will manage that router only? The
> only
> > document mention its use is when use_namespace is False. In my case, I
> > have it
> > set to True.
> >
> > Side note: there is a question on
> > https://answers.launchpad.net/neutron/+question/236230 which says it's
> > possible to change router's l3 agent, but did not mention how.
> >
> > Any help is appreciated.
> >
> > /
> > YY Inc. is hiring openstack and python developers. Interested? Check
> > http://www.nsbeta.info/jobs/
> >
> > --
> > Thanks,
> > Yuanle
> >
> >
> > _______________________________________________
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