Hi@akhtar,
For the above issue, there may be multiple cause of creating network.
1. Check the neutron port is open in firewall or not. If it is not, use the below command to open this.
$ iptables -A INPUT -p tcp –dport 9696 -j ACCEPT
$netstat -lnpt | grep 9696
2. After that check keystone section in /etc/neutron/neutron.conf file.