steps to troubleshoot virtual machine
1) virtual machine is not communicating with each other. 2) virtual machine is not able to communicate with external networking. 3) Virtual machine is not getting IP . what are the steps to be taken for troubleshooting ..
Point 3 is the cause for points 2 and 1.
You need to find out how traffic flows from the DHCP server to the instance, and where it is blocked. Without knowing your setup, all I can offer is the Networking Guide: https://docs.openstack.org/neutron/la....
my vm are not pinging from each other , where i need to look on this.!!
They are not pinging because, as you say:
they got ip address but are not pinging.!!
enable ALL ICMP ingress on your security rules, that will help pinging between VM's.