Topology Simulation

Topology simulation is done by the MidoNet Agent (Midolman), which retrieves the virtual topology data from the Network State Database (NSDB).

Check the /var/log/midolman/midolman.log file for errors or warnings.

Ensure that the connection to the NSDB works properly. The NSDB consists of two components, ZooKeeper and Cassandra.

You can verify network accessibility manually by pinging the NSDB hosts and telnetting to the appropriate service ports.

ServicePort

ZooKeeper

2181

Cassandra

9042

# telnet nsdb-host 2181
Trying 192.0.2.1...
Connected to nsdb-host.
# telnet nsdb-host 9042
Trying 192.0.2.1...
Connected to nsdb-host.
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