import { Callout } from "nextra/components";
import { SupportedPlatforms } from "~/components/platforms";
import { DocsButton } from "~/components/docs-button";

## Device Configuration Parameters

Each configured device may have the following parameters:

| Parameter           | Type            | Default Value | Description                                                                                                                                |
| :------------------ | :-------------- | :------------ | :----------------------------------------------------------------------------------------------------------------------------------------- |
| `name`              | String          |               | Display name of the device.                                                                                                                |
| `description`       | String          |               | Description of the device, displayed as a subtle label.                                                                                    |
| `avatar`            | String          |               | Path to an avatar/logo image for this site. Used when [`web.location_display_mode`](/configuration/config/web-ui.mdx) is set to `gallery`. |
| `address`           | String          |               | IPv4 address, IPv6 address, or hostname of the device.                                                                                     |
| `group`             | String          |               | Group name, used to visually group devices in the UI.                                                                                      |
| `port`              | Number          |               | TCP port on which to connect to the device.                                                                                                |
| `platform`          | String          |               | Device platform/OS. Must be a [supported platform](/platforms.mdx).                                                                        |
| `structured_output` | Boolean         | True          | Disable structured output for a device that supports it.                                                                                   |
| `directives`        | List of Strings |               | Enable referenced directives configured in the [directives config file](/configuration/directives.mdx).                                    |
| `driver`            | String          | netmiko       | Specify which driver to use for this device. Currently, only `netmiko` is supported.                                                       |
| `driver_config`     | Mapping         |               | Mapping/dict of options to pass to the connection driver.                                                                                  |
| `attrs`             | Mapping         |               | Mapping/dict of variables, as referenced in configured directives.                                                                         |
| `credential`        | Mapping         |               | Mapping/dict of a [credential configuration](/configuration/devices/credentials.mdx).                                                      |
| `http`              | Mapping         |               | Mapping/dict of [HTTP client options](/configuration/devices/http-device.mdx), if this device is connected via HTTP.                       |
| `proxy`             | Mapping         |               | Mapping/dict of [SSH proxy config](/configuration/devices/ssh-proxy.mdx) to use for this device's requests.                                |

<Callout type="tip">

hyperglass ships with predefined [directives](/configuration/directives.mdx) (commands) for the following [platforms](platforms.mdx):

<SupportedPlatforms />

All built in directives require that the following `attrs` be defined on each device using the directive:

| Attribute | Value                                                     |
| :-------- | :-------------------------------------------------------- |
| `source4` | IPv4 address used to source Ping and Traceroute commands. |
| `source6` | IPv6 address used to source Ping and Traceroute commands. |

**Example**

```yaml filename="devices.yaml" {5-7} copy
devices:
    - name: New York, NY
      address: 192.0.2.1
      platform: cisco_ios
      attrs:
          source4: 192.0.2.1
          source6: "2001:db8::1"
```

</Callout>

<Callout type="warning">
    If you do not utilize IPv6 in your network, you'll need to create your own directive that only
    has IPv4 commands.
</Callout>

## Examples

### Simple

```yaml filename="devices.yaml" copy
devices:
    - name: New York, NY
      address: 192.0.2.1
      platform: cisco_ios
      credential:
          username: you
          password: your password
    - name: San Francisco, CA
      address: 192.0.2.2
      platform: juniper
      credential:
          username: you
          password: your password
```

<h3 className="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-8 _text-2xl">
    {" "}
    <DocsButton href="/configuration/directives" /> With Directives
</h3>

In this example, an additional directive `cisco-show-lldp-neighbors` is added to the built-in directives.

```yaml filename="devices.yaml" copy {8-9}
devices:
    - name: New York, NY
      address: 192.0.2.1
      platform: cisco_ios
      credential:
          username: you
          password: your password
      directives:
          - cisco-show-lldp-neighbors
```

<h3 className="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-8 _text-2xl">
    {" "}
    <DocsButton href="/configuration/directives" /> Disable Built-in Directives
</h3>

In this example, _only_ the `cisco-show-lldp-neighbors` directive will be available. Built-in directives are disabled.

```yaml filename="devices.yaml" copy {8-10}
devices:
    - name: New York, NY
      address: 192.0.2.1
      platform: cisco_ios
      credential:
          username: you
          password: your password
      directives:
          - builtin: false
          - cisco-show-lldp-neighbors
```

<h3 className="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-8 _text-2xl">
    {" "}
    <DocsButton href="/configuration/directives" /> Enable Specifc Built-in Directives
</h3>

In this example, only specified built-in directives are made available.

```yaml filename="devices.yaml" copy {8-9}
devices:
    - name: New York, NY
      address: 192.0.2.1
      platform: cisco_ios
      credential:
          username: you
          password: your password
      directives:
          - builtin: [bgp_route, traceroute]
```