2. Topology diagram

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1. I think it is appropriate to write the IP 10.0.0.1 above the eth1 (flat) on the eth1 of the intermediate compute nodes, after all br100 is built on the compute nodes.

2. The floating IP 192.168.139.53 of the intermediate compute node should be written at this node eth0. It seems to be true, however, that it can be understood as a floating IP for an internal VM instance.

3. In this case, assuming that the control node is down, the instance can still communicate with the external network.

2. Topology diagram