Re: How are you doing DHCPv6 ?

["Brzozowski, John" <John_Brzozowski () Cable Comcast com>]

On 1/17/12 6:37 PM, "Daniel Roesen" <dr () cluenet de> wrote:

> On Tue, Jan 17, 2012 at 06:19:28PM -0500, Randy Carpenter wrote:
> > > You might want to give this a read:
> > >
> > >  
> > http://www.ietf.org/id/draft-ietf-dhc-dhcpv6-redundancy-consider-02.txt
> >
> > That doesn't really help us if we want to deploy before that draft
> > becomes a standard.
>
> Well, it more or less just presents options (workarounds for missing
> proper HA sync).
[jjmb] correct.  FWIW the IETF dhcwg is currently working on DHCPv6
failover/redundancy.  See here for the requirements:

http://tools.ietf.org/html/draft-mrugalski-dhc-dhcpv6-failover-requirements
-00


> > Are there any DHCPv6 servers currently that actually function in a
> > fashion that is suitable for service providers?
>
> Without specifying your requirements, that's hard to say. If you're
> looking for fully state-sync'ed DHCPv6 server HA, I'm not aware of any.
[jjmb] same here, I expect a specification would be required first.

> Cisco unfortunately pushed that another year into the future for CNR, so
> we're resorting for now to the "Split Prefixes" model described in
> abovementioned draft, effectively halving our DHCPv6-PD pools and thus
> exacerbates the negative effects of RIPE's overly converservative
> policy (HD-Ratio 0.94) on IPv6 by effectively stealing one bit (half
> the address space) just for redundancy. :-(
[jjmb] we have to do what we have to do, the good news migration to a
proper failover model should be straight forward.

> Best regards,
> Daniel
>
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