Question about IPAM tools for v6

Brian E Carpenter brian.e.carpenter at
Thu Jan 30 01:57:42 CET 2014

On 30/01/2014 11:19, Cricket Liu wrote:
> Hi Mark.
> On Jan 29, 2014, at 11:07 AM, Mark Boolootian <booloo at> wrote:
>>> Can anyone say whether existing IP Address Management tools that
>>> support IPv6 have built-in assumptions or dependencies on the
>>> /64 subnet prefix length, or whether they simply don't care about
>>> subnet size?
>> We use Infoblox's IPAM.  There aren't any limitations of which I'm
>> aware in terms of allocating space and IPv6 prefix length in the IPAM.
>> However, I don't know if there are restrictions when it comes to
>> DHCPv6, as we've only set up /64s.
> Consensus around here is that we support DHCPv6 for non-/64 subnets (particularly in the context of Prefix Delegation), but the immediate next question is "Why would you need that?"

That's been a reasonably hot topic over on the IETF v6ops list,
which is what prompted a group of us to start writing a draft
(which we want to make fact-based, not opinion-based, hence
my question here).

Thanks to you and the others who have replied with facts!


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