IPAM - Allocate by prefix role, Prefix role constraints and "find smallest gap" allocation.

[Wh1terat]

Hi All,

Couple of questions.

1. Is it possible to allocate an address by prefix role?
Example:
We have a number of non contiguous prefixes as "containers" assigned a particular role (e.g framed addresses for broadband users).
Is it possible to allocate an address by role rather than specific parent prefix ?
(i.e we don't care which prefix it is allocated from so long as that prefix has a particular role)

2. Is it possible to add constraints to a prefix role or prefix ?
Building on the above example, would it be possible to limit the child prefix size?
In this example, limiting to /32 only.

3. When allocating an address, is there any logic applied to find the smallest available gap ?
Example:

• 192.0.2.0/24

• 192.0.2.0/26 - Allocated

• 192.0.2.96/27 - Allocated

If we wanted a a /27 allocation, would it assign 192.0.2.64/27 or 192.0.2.128/27 ?
The former being preferable otherwise we are breaking up a perfectly good contiguous /25 when a perfectly sized block already exists.