Docker Custom Bridge

custom_bridge.sh

# List netwoks
docker network ls

# Prune un-necessary networks 
docker network prune  

# Create a custom bridge network 
# See man docker-network-create 
 docker network create \
                --driver=bridge\
                --subnet=172.28.0.0/22 \
                --ip-range=172.28.0.0/23 \
                --gateway=172.28.0.1 \
                devbr
                
docker run -dit --name alpine1 --network devbr alpine ash                
docker run -dit --name alpine2 --network devbr alpine ash                
docker run -dit --name alpine3 alpine ash                
docker network connect devbr alpine3 

docker attach alpine1 
ip addr show 
ping -c 2 172.28.0.1 
ping -c 2 172.28.0.2
ping -c 2 172.28.0.3

# From OS  
ifconfig  -a  | grep 172.27.0.1 

# Ping from OS to docker vm
ping  -c 2 172.28.0.3   # This also pings successfully