network inspect

Usage:  docker network inspect [
OPTIONS
]
 NETWORK [
NETWORK...
]

Display detailed information on one or more networks

Options:
  -f, --format string   Format the output using the given go template
      --help            Print usage

Returns information about one or more networks. By default, this command renders all results in a JSON object. For example, if you connect two containers to the default bridge network:

$ 
sudo docker run -itd --name=container1 busybox
f2870c98fd504370fb86e59f32cd0753b1ac9b69b7d80566ffc7192a82b3ed27

$ 
sudo docker run -itd --name=container2 busybox
bda12f8922785d1f160be70736f26c1e331ab8aaf8ed8d56728508f2e2fd4727

The network inspect command shows the containers, by id, in its
results. For networks backed by multi-host network driver, such as Overlay,
this command also shows the container endpoints in other hosts in the
cluster. These endpoints are represented as “ep-{endpoint-id}” in the output.
You can specify an alternate format to execute a given
template for each result. Go’s
text/template package describes all the
details of the format.

$ sudo docker network inspect bridge
[
    {
        "Name"
: "bridge",
        "Id"
: "b2b1a2cba717161d984383fd68218cf70bbbd17d328496885f7c921333228b0f",
        "Scope"
: "local",
        "Driver"
: "bridge",
        "IPAM"
: {
            "Driver"
: "default",
            "Config"
: [
                {
                    "Subnet"
: "172.17.42.1/16",
                    "Gateway"
: "172.17.42.1"
                }
            ]
        },
        "Internal"
: false,
        "Containers"
: {
            "bda12f8922785d1f160be70736f26c1e331ab8aaf8ed8d56728508f2e2fd4727"
: {
                "Name"
: "container2",
                "EndpointID"
: "0aebb8fcd2b282abe1365979536f21ee4ceaf3ed56177c628eae9f706e00e019",
                "MacAddress"
: "02:42:ac:11:00:02",
                "IPv4Address"
: "172.17.0.2/16",
                "IPv6Address"
: ""
            },
            "f2870c98fd504370fb86e59f32cd0753b1ac9b69b7d80566ffc7192a82b3ed27"
: {
                "Name"
: "container1",
                "EndpointID"
: "a00676d9c91a96bbe5bcfb34f705387a33d7cc365bac1a29e4e9728df92d10ad",
                "MacAddress"
: "02:42:ac:11:00:01",
                "IPv4Address"
: "172.17.0.1/16",
                "IPv6Address"
: ""
            }
        },
        "Options"
: {
            "com.docker.network.bridge.default_bridge"
: "true",
            "com.docker.network.bridge.enable_icc"
: "true",
            "com.docker.network.bridge.enable_ip_masquerade"
: "true",
            "com.docker.network.bridge.host_binding_ipv4"
: "0.0.0.0",
            "com.docker.network.bridge.name"
: "docker0",
            "com.docker.network.driver.mtu"
: "1500"
        }
    }
]

Returns the information about the user-defined network:

$ docker network create simple-network
69568e6336d8c96bbf57869030919f7c69524f71183b44d80948bd3927c87f6a
$ docker network inspect simple-network
[
    {
        "Name"
: "simple-network",
        "Id"
: "69568e6336d8c96bbf57869030919f7c69524f71183b44d80948bd3927c87f6a",
        "Scope"
: "local",
        "Driver"
: "bridge",
        "IPAM"
: {
            "Driver"
: "default",
            "Config"
: [
                {
                    "Subnet"
: "172.22.0.0/16",
                    "Gateway"
: "172.22.0.1/16"
                }
            ]
        },
        "Containers"
: {},
        "Options"
: {}
    }
]