New features in DHCP

ISC DHCP 4.1.x will have several new DHCPv6 features that were not in DHCP 4.0.x. These are planned to include:

  • Support for the rapid-commit option on the client side
  • Prefix Delegation support
  • IA_TA address support
  • A basic DHCPv6 relay agent, dhcrelay6

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ISC's DHCP version 4.2.x was released on 25 Mar 2011.

  • Processing the DHCP to DNS server transactions in an asynchronous fashion. The DHCP server or client can now continue with it's processing while awaiting replies from the DNS server.

Please note: The full list of changes made to DHCP over time is in the Release Notes packaged with the DHCP distribution.

There are a number of DHCPv6 limitations and features missing, which will be addressed in the future:

  • Only Solaris, Linux, FreeBSD, NetBSD, and OpenBSD are supported.
  • DHCPv6 includes human-readable text in status code messages, in English.  A method to reconfigure or support other languages would be preferable.
  • The "host-identifier" option is limited to a simple token.
  • The client and server can only operate DHCPv4 or DHCPv6 at a time, not both. To use both protocols simultaneously, two instances of the relevant daemon are required, one with the '-6' command line option.

     

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