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 > <rcar...@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/ > >
