[c-nsp] VLSM

[matthew zeier]

>> When my sales droids and customers ask for a class C, they get told that
>> we don't have any class C addresses available, but they can have an
>> appropriate subnet of one of our ARIN allocations when they fill out a
>> justification form.  We include a blurb about subnetting and slash
>
> What do you use for your "justification form"?

I wrote a document that describes why we need justification and sort of 
mirrors ARIN's form (sample available on request).  I've inserted it into 
the sales process - nothing moves forward until we have a signed contract 
and the IP form (without it, we default to /29s).  And us IP provisioning 
guys are such a hard ass about it that sales knows not to bother assigning a 
ticket over unless they have that form.

During contract renewals we nmap their address space and if it doesn't meet 
our requirements we ask for justification again.  At this point they either 
justify and we like or we change netmask or customer forks over more money. 
The latter seems to encourage one other first two options.

And in some cases additional /24s are so "cost prohibitive" that the 
customer's encouraged to plead their case to ARIN and get their own space.