Inspect Docker networks

Topic: Containers core

List and inspect Docker networks with docker network ls and docker network inspect. See which containers are on a network and their IPs. Use when debugging connectivity.

Intent: How-to

Quick answer

  • docker network ls lists networks. docker network inspect netname shows details and containers.
  • Inspect shows subnet, gateway, and container endpoints with IPs. Use to verify containers on same network.
  • docker inspect container_id shows network settings for that container. Use for DNS and IP checks.

Prerequisites

Steps

  1. List networks

    docker network ls. Identify bridge, host, none and custom networks.

  2. Inspect network

    docker network inspect bridge or custom name. Read Containers and IPAM sections.

  3. Inspect container

    docker inspect container_id. Check NetworkSettings.Networks for IP and network name.

Summary

Use docker network ls and inspect to see networks and members; use docker inspect container for its network settings.

Prerequisites

Steps

Step 1: List networks

Run docker network ls; note custom networks.

Step 2: Inspect network

Run docker network inspect netname; check containers and IPs.

Step 3: Inspect container

Run docker inspect container; check NetworkSettings.

Verification

  • You see which containers are on which network and their IPs.

Troubleshooting

Container not on network — docker network connect. Wrong IP — Check subnet and gateway in inspect.

Next steps

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