nova floating-ip-associate cirros 172.10.0.53
ERROR (BadRequest): Unable to associate floating ip 172.10.0.53 to fixed ip 10.0.0.6 for instance c7d69e1d-4171-4b86-a334-b4b4f18d9e9b. Error: External network 97e91490-5062-4888-a961-d32b045e1af4 is not reachable from subnet 0e83d2e7-48fd-41b3-afc6-1c0d802feb17.  Therefore, cannot associate Port 5457c88a-b2ef-41ef-9728-7c29473a4645 with a Floating IP. (HTTP 400) (Request-ID: req-a2354201-e8c7-42c2-9217-b07a59906d33)