# Network diagram (NWDiag)

NWDiag puts each network on its own band and attaches hosts to it. A host on two networks appears on both, joined automatically, which is the feature that makes it worth using.

---

## What this example shows

* Address ranges declared per network.
* A host present on two networks, joined for you.
* Descriptions on networks and hosts.

---

## A worked example

Open it, edit it, or copy the source below.

![Network diagram (NWDiag)](https://help.gocapable.com/images/att1439203330.svg)

The source, which you can paste into a new diagram and edit:

```
nwdiag {
  network dmz {
    address = "10.0.1.0/24";
    description = "Public";

    lb01 [address = "10.0.1.10"];
    web01 [address = "10.0.1.11"];
    web02 [address = "10.0.1.12"];
  }

  network app {
    address = "10.0.2.0/24";
    description = "Application";

    web01 [address = "10.0.2.11"];
    web02 [address = "10.0.2.12"];
    api01 [address = "10.0.2.21"];
    api02 [address = "10.0.2.22"];
  }

  network data {
    address = "10.0.3.0/24";
    description = "Data";

    api01 [address = "10.0.3.21"];
    api02 [address = "10.0.3.22"];
    db01 [address = "10.0.3.31", description = "Postgres primary"];
    db02 [address = "10.0.3.32", description = "Postgres replica"];
  }
}
```

---

## Making it your own

* Repeat the host name in each network it belongs to.
* Addresses are free text, so check them against your allocation table.
* Split by site above about thirty hosts.

---

## Related

[Packet diagram (PacketDiag)Bit offsets, computed rather than drawn.](https://help.gocapable.com/diagrams/packet-diagram-packetdiag.html)

[Rack diagram (RackDiag)An elevation that matches the room.](https://help.gocapable.com/diagrams/rack-diagram-rackdiag.html)

[More languagesBack to the rest of these examples.](https://help.gocapable.com/diagrams/more-languages.html)

---

_Specialists. Borrow one when you need it._