How are you doing DHCPv6 ?

Ray Soucy rps at maine.edu
Mon Jan 23 16:52:42 CST 2012


Thanks, Mark.

The ISC website isn't very clear on how to make such requests unless
you have a support contract.

Also make note of my last response to the thread on logging and MAC
awareness, as it may also be worth consideration.




On Mon, Jan 23, 2012 at 5:05 PM, Mark Andrews <marka at isc.org> wrote:
>
> In message <CALFTrnMXzdoS=-B=WT1hVfgKVDrQZDZ8KonhOpgU1JoqxO9j5A at mail.gmail.com>
> , Ray Soucy writes:
>> 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).
>
> I can't see any request to add this feature to ISC DHCPv6 so I've opened
>
>        27564   request for duid+iaid as selection criteria
>
> If we don't know you need a feature we can't put it on the roadmap.
>
>> 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 at network1.net> wrote
>> :
>> >
>> > I am wondering how people out there are using DHCPv6 to handle assigning pr
>> efixes to end users.
>> >
>> > We have a requirement for it to be a redundant server that is centrally loc
>> ated. 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. How
>> ever, 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 o
>> f 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 i
>> t 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/
>>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org



-- 
Ray Soucy

Epic Communications Specialist

Phone: +1 (207) 561-3526

Networkmaine, a Unit of the University of Maine System
http://www.networkmaine.net/



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