# ping

## Syntax

```
ping [ip|ipv6] <host>
```

## Syntax Description

<table><thead><tr><th width="203">Keyword</th><th>Description</th></tr></thead><tbody><tr><td><code>ip</code></td><td>(Optional) Use IPv4.</td></tr><tr><td><code>ipv6</code></td><td>(Optional) Use IPv6.</td></tr><tr><td>host</td><td>The domain name or IP address of the host to be pinged.</td></tr></tbody></table>

## Defaults

If neither `ip` no `ipv6` is specified, the protocol is chosen automatically.

## Usage Guidelines

The ping command is used to test the reachability of another system and measure the round-trip time (RTT) to the system using ICMP Echo Request packets. Once the command is issued, it will continue until stopped by pressing Control-C.

## Examples

```
ping 192.168.81.42
ping ipv6 www.example.com
```

## Related Commands

{% content-ref url="broken-reference" %}
[Broken link](https://docs.islandrouter.com/island-router-cli-2.3.2/commands/broken-reference)
{% endcontent-ref %}