[root@ChatDevOps ~]# docker network create my-net
71b42506de62797889372ea4a5270f905f79a19cf80e308119c02e529b89c94e
[root@ChatDevOps ~]# docker network ls
NETWORK ID     NAME        DRIVER       SCOPE
3dec5cbb852e    bridge       bridge       local
6dd6dcfc2f26    host        host        local
71b42506de62    my-net       bridge       local
4c142a02cd6b    none        null        local

[root@ChatDevOps docker]# docker create -it --name d1 --network my-net -p 8080:80 ubuntu:14.04
4776b65db566f370cad5da3a9354a12c7e4f9badab53647b7e30e1e8f343ae3d
[root@ChatDevOps docker]# docker start d1
d1

[root@ChatDevOps docker]# docker run -it --name d2 --network my-net --publish 8081:80 ubuntu:14.04 /bin/bash
root@07fd516911d0:/# ping d1
PING d1 (172.18.0.2) 56(84) bytes of data.
64 bytes from d1.my-net (172.18.0.2): icmp_seq=1 ttl=64 time=0.115 ms
root@4776b65db566:/# ping d2
PING d2 (172.18.0.3) 56(84) bytes of data.
64 bytes from d2.my-net (172.18.0.3): icmp_seq=1 ttl=64 time=0.062 ms

[root@ChatDevOps ~]# docker network ls
NETWORK ID     NAME        DRIVER       SCOPE
3dec5cbb852e    bridge       bridge       local
6dd6dcfc2f26    host        host        local
4c142a02cd6b    none        null        local

{
 "bip": "192.168.1.5/24",
 "fixed-cidr": "192.168.1.5/25",
 "fixed-cidr-v6": "2001:db8::/64",
 "mtu": 1500,
 "default-gateway": "10.20.1.1",
 "default-gateway-v6": "2001:db8:abcd::89",
 "dns": ["10.20.1.2","10.20.1.3"]
}