# DHCPv6 Client

You can enable an interface to accept a configuration from a Dynamic Host Configuration Protocol version 6 (DHCPv6) server. By default, the security device does not perform DHCPv6 client actions. DHCPv6 clients request the delegation of long-lived prefixes that they can push to individual local hosts.

To disable DHCPv6 settings, click None, then Apply.

To enable DHCPv6 client actions, perform the following steps:

1. Click DHCP Client to configure DHCPv6.

2. Select the DUID setting(s) necessary for your network:
   - Enable enables this feature.
   - Send Rapid Commit is an optional setting. If enabled, the client/server interaction requires two instead of four messages.
   Note: For more information about how rapid commit can affect your network, refer to RFCs 3315 and 3633.

3. Select the types of Information Requested from Server:
   - DNS: This setting requests the Domain Name System (DNS) server IP addresses.
   - DNS search list: This setting requests a list of partial domain names, which assist DNS searches by concatenating entered usernames to the domain names.
   - Delegated Prefix: This setting requests the IPv6 prefix that the client uses to perform address autoconfiguration.

4. Enter the Device-Unique Identification (DUID) of the preferred DHCPv6 server in the Preferred Server (DUID) field.

5. To save your preferences, click Apply.