Comment 11 for bug 1361710

Meg, this information is for you:

Sometimes, the external network connection and floating IP may stop working, but L3 agent has no errors in the logs.
Currently, it's supposed that this is somehow caused by clean-up script that launches or works out in a wrong way, so that it deletes router interfaces that must support a connection to an external network.

There is no stable workaround yet.

A temporary way of getting rid of this bug is the following: to recreate router or reschedule L3 agent.