Few network related commands

To see how many bridges exist in your system:

      ovs-vsctl list-br

To verify the connectivities amongs hosts:

     netstat -antp | grep destination-IP
   
     For example, to see a host and the connectivity at ip 10.0.2.25, use this command:
  

  netstat -antp | grep 10.0.2.25

  Here is the results:

tcp        0      0 10.0.2.26:60536         10.0.2.25:5672          ESTABLISHED 6977/python
tcp        0      0 10.0.2.26:60526         10.0.2.25:5672          ESTABLISHED 31103/python
tcp        0      0 10.0.2.26:34444         10.0.2.25:6642          ESTABLISHED 6717/ovn-controller
tcp        0      0 10.0.2.26:60542         10.0.2.25:5672          ESTABLISHED 6977/python
tcp        0      0 10.0.2.26:60538         10.0.2.25:5672          ESTABLISHED 6977/python
tcp        0      0 10.0.2.26:39282         10.0.2.25:3306          ESTABLISHED 31103/python
tcp        0      0 10.0.2.26:60528         10.0.2.25:5672          ESTABLISHED 31103/python

5672 is the default port for rabbitmq

6642 is the port for ovn south bound db

3306 is the default port for mysql