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Feature #9536

open

Support dynamic prefix in DHCPv6 Server

Added by Jozsef Krizsik almost 6 years ago. Updated about 1 year ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
DHCP (IPv6)
Target version:
Future
Start date:
05/18/2019
Due date:
% Done:

0%

Estimated time:
Plus Target Version:
Release Notes:

Description

Most of the ISPs using dynamic IPv6 PD. Pfsense receive the prefix and can allocate a /64 prefix on LAN interfaces (Track Interface mode). Create a Tranking Interface like option in the DHCPv6 prefix delegation. Now Pfsense has some strong limitation if the IPv6 is dynamic.

Example: Pfsense receive /56 from ISP. This means 256pcs /64 prefix. Now prefix 0,1 can be used in LAN1 and LAN2. The unused prefixes (2-256) should be used by DHCPv6 PD Server to send prefixes to other routers.

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 #1

Updated by Steve Wheeler almost 5 years ago

This would be a very useful feature.

The prefix delegations handed out by the DHCPv6 Server are currently static only. If the prefix they are delegating out of is dynamic that means a manual update everytime it changes.

Allow the prefix delegation range to track another interface.

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 #2

Updated by Heiko Mischer over 4 years ago

This seems to be at least related to issue 6626 -> https://redmine.pfsense.org/issues/6626

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 #3

Updated by Manuel Wagner almost 3 years ago

This ticket is already open for years now.

Any chance to get dynamic prefix delegation to downstream router work ?

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 #4

Updated by Joshua Cooper about 1 year ago

Is this also similar to 5950? https://redmine.pfsense.org/issues/5950 Are there any plans or updates on this?

Part of the issue now, I'm guessing, is that the Kea back end for pfSense doesn't even support DHCPv6-PD at all, let alone static. Anyone using pfSense as an intermediate PD server is stuck with ISC at the moment. I can't imagine they'd be developing new features on a deprecated back end. https://www.netgate.com/blog/netgate-adds-kea-dhcp-to-pfsense-plus-software-version-23.09-1

That being said, static configuration is extremely tedious for intermediate PD servers, ones which are both DHCPv6-PD clients and servers, especially on networks that have frequent prefix changes upstream. As it stands, I think it's safe to say that pfSense's usefulness as a DHCPv6-PD server is severely diminished by static-only prefix delegation ranges.

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