Re: A common problem with SLAAC in "renumbering" scenarios

[Nick Hilliard <[e-mail]>]

Mikael Abrahamsson wrote on 04/02/2019 12:34:
> Trying to demand that ISPs keep the same /56 for the duration of the 
> contract is not going to work because that's not what real life looks 
> like. I'd say we should take the fight about perhaps about lifetimes and 
> definititely about delegation sizes (I still run into people with only 
> /60 or /64), but contract-length stable prefix isn't something I'd 
> advocate to fight for. It's too far out even for me.

I think you and Ole are talking about different meanings of the word 
"contract".

Unless I'm mistaken, Ole is saying that a dhcp6-pd lease for time period 
X is a contract for time period X, during which the ISP should retain 
enough state that if the CPE issues another dhcp request within time 
period X, they will receive the same prefix.  However, when time period 
X elapses, the ISP is fully within their rights to assign a different 
prefix.

Maintaining static leases for the duration of a legal contract with a 
customer involves hassle and pain.

Nick