Appendix B – DHCPv6 Options (RFC 3315)

A DHCP server can provide optional configurations to the client. Sophos XG Firewall provides support to configure following DHCPv6 Options as defined in RFC 3315. To set the options, refer to DHCPv6 Management section.

Option Number Name Description Data Type
21 SIP servers names The domain names of the SIP outbound proxy servers for the client to use Alphanumeric text with/without quotes
22 SIP servers addresses Specifies a list of IPv6 addresses indicating SIP outbound proxy servers available to the client Alphanumeric text with/without quotes
24 Domain search

Specifies the domain search list the client is to use when resolving hostnames with DNS

Alphanumeric text with/without quotes
27 NIS servers Provides a list of one or more IPv6 addresses of NIS servers available to the client Alphanumeric text with/without quotes
28 NISP servers Provides a list of one or more IPv6 addresses of NIS+ servers available to the client Alphanumeric text with/without quotes
29 NIS domain name Used by the server to convey client's NIS Domain Name info to the client Alphanumeric text with/without quotes
30 NISP domain name Used by the server to convey client's NIS+ Domain Name info to the client Alphanumeric text with/without quotes
31 SNTP servers Provides a list of one or more IPv6 addresses of SNTP servers available to the client for synchronization Alphanumeric text with/without quotes
32 INFO refresh time Specifies an upper bound for how long a client should wait before refreshing information retrieved from DHCPv6 Alphanumeric text with/without quotes
33 BCMS server D Broadcast and Multicast service controller domain name list option for DHCPv6 Alphanumeric text with/without quotes
34 BCM server A Broadcast and Multicast service controller IPv6 address option for DHCPv6 Alphanumeric text with/without quotes