We have also recently realized that the DUID is pretty much completely random, and there is no way to tie the MAC address to a client. This pretty much makes it impossible to manage a large customer base. -Randy ----- Original Message -----
This is a problem that would be nice for ISC to resolve (or another dependable FOSS implementation).
For a while now (about 20 years I believe) we've used ISC DHCPd in a distributed model for our public IPv4 space. In a nutshell, each DHCP server is configured only with static assignments, their log files are monitored (simple event correlator), and scripts are fired off to perform tasks like new assignments against a centralized database (MySQL). The database is responsible for keeping track of address assignments centrally and is used to generate configuration files for DHCPd. Dynamic updates are made using OMAPI.
Unfortunately, the ISC DHCPv6 implementation makes replicating this impossible due to the lack of information logged.
Another problem with the ISC DHCPv6 implementation is that it doesn't allow you to assign fixed-address information based on the DUID _and_ IAID, which becomes a problem when a host has more than one active adapter.
The only options are hacking the source code if you feel comfortable doing so, or waiting for ISC to make the change (if they ever plan to).
For now, we get by with static assignments made in the database and no dynamic allocation via DHCPv6, which does OK in a dual-stack environment where IPv6 isn't considered necessary yet, but in the near future that will change.
On Tue, Jan 17, 2012 at 5:04 PM, Randy Carpenter <rcarpen@network1.net> wrote:
I am wondering how people out there are using DHCPv6 to handle assigning prefixes to end users.
We have a requirement for it to be a redundant server that is centrally located. DHCPv6 will be relayed from each customer access segment.
We have been looking at using ISC dhcpd, as that is what we use for v4. However, it currently does not support any redundancy. It also does not do very much useful logging for DHCPv6 requests. Certainly not enough to keep track of users and devices.
So, my questions are:
How are you doing DHCPv6 with Prefix Delegation?
What software are you using?
When DHCPv6 with Prefix Delegation seems to be about the only way to deploy IPv6 to end users in a generic device-agnostic fashion, I am wondering why it is so difficult to find a working solution.
thanks, -Randy
-- | Randy Carpenter | Vice President - IT Services | Red Hat Certified Engineer | First Network Group, Inc. | (800)578-6381, Opt. 1 ----
-- Ray Soucy
Epic Communications Specialist
Phone: +1 (207) 561-3526
Networkmaine, a Unit of the University of Maine System http://www.networkmaine.net/