I have an Openstack setup on Ubuntu/Juju/MAAS, and I was able to successfully set up instances and get them networked using Quantum as recently as a few days ago. A couple of days ago it stopped working. When I try to add an instance, nova-compute errors out citing an error while setting up networking. Quantum is returning "404 Not Found". I enabled debug logging on both nova and quantum and could not make out anything that helped to narrow down what the problem is. I even took a tcpdump of the traffic between the nova-compute node and the quantum server. The network ID that nova looks correct and the dashboard shows the network is UP and ACTIVE. I'm a bit stumped on where else to look and what to look for in order to troubleshoot this further. Any pointers on how I can troubleshoot this would be really appreciated.
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