Comment 2 for bug 1176661

No, I meant it the way it was written. ExtNetUuid is a parameter provided at launch time and is the UUID of admin created network that is used for external access. The template should create a local network, a router that is connected to this local network and to the external network. I also attached a screenshot of the network topology, but I am not sure if it got added.

If I try to recreate this stack manually, the situation is as follows. If I create local network and the three instances and then try to associate a floating IP, I will get the same error as above.If I first also create a router and connect it with the local network and the external network, associating a floating IP is successful. So it seems as if the stack creation tries to associate a floating IP before it creates the router from the template, which Quantum doesn't like and therefore it fails. If I watch the stack being created, the error happens before the router is created. If I remove the floating IP stuff, stack creatiion is successfull with local network, router and the three instances being created. After this I can also manually associate floating IPs.

Am i looking at this correctly or is there something that I misunderstand?