# ip dhcp-scope

## Syntax

```
[no] ip dhcp-scope [<low>]-[<high>]
```

## Syntax Description

<table><thead><tr><th width="125">Keyword</th><th>Description</th></tr></thead><tbody><tr><td>low</td><td>The decimal value of the host portion of the first IP address in the scope.</td></tr><tr><td>high</td><td>The decimal value of the host portion of the last IP address in the scope.</td></tr></tbody></table>

## Defaults

In the abscence of this command, the default DHCP scope is "50-". Otherwise, the defaul low value is 1 and the default high value is the last available host address on the network.

## Usage Guidelines

This command defines the range of IPv4 addresses assignable to DHCP clients. The low value is the host portion of the first assigneable address in the scope. If omitted, the default low value is 1.

The high value is the host portion of the last assignable address in the scope. If omitted, the default high value is the host portion of the last assignable address in the interface's network range. Note that the highest address in a network is reserved for broadcasts, and will never be assigned by the DHCP server.

Since these values are the decimal value of the *host* portion (only) of the IP address, the high value may exceed 254 for networks larger than /24. For example, the highest assignable value for a /22 IPv4 network (i.e., 10 bits of host address) would be 1022.

This command is valid only in interface context. Entering it does not change the [configuration mode](/island-router-cli-2.3.2/commands/ip-interface-context/ip-autoconfig.md) of the interface.

## Examples

```
ip dhcp-scope 100-
ip dhcp-scope 100-510
```

## Related Commands

{% content-ref url="/pages/BWJnOTqEun5cyL135Pir" %}
[ip dhcp-server](/island-router-cli-2.3.2/commands/ip-interface-context/ip-dhcp-server.md)
{% endcontent-ref %}


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