Identifying Existing Docker Subnets

To display all configured Docker network subnets:

docker network inspect $(docker network ls -q) | grep Subnet

You can also list available Docker networks:

docker network ls

Inspect a specific network:

docker network inspect <network_name>

Example:

docker network inspect bridge

Choosing a Free Subnet

Each interconnect network must use a unique subnet.

Example:

			
docker network create \
  --driver=bridge \
  --subnet=192.168.18.0/24 \
  --internal \
  rac_eth1priv2_nw

		

			
docker network create \
  --driver=bridge \
  --subnet=192.168.19.0/24 \
  --internal \
  rac_eth2priv2_nw

		

If those ranges are already in use, consider:

			
168.50.0/24
168.60.0/24
10.10.0/24
20.20.0/24