4 ms·
> Doesen't /64 mean that you can't create additional subnets within your ISP given range? Effectively yes. > I thought /56 was the smallest allocation an ISP
by aaronax 4y ago
> Doesen't /64 mean that you can't create additional subnets within your ISP given range?
Effectively yes.
> I thought /56 was the smallest allocation an ISP could make for a residential allocation.
They can and often do make /64 allocations. There is an RFC (I think, might just be RIPE guidance or something) that recommends that ISPs issue larger to each customer. Many don't (as it is just a recommendation). Ideally they would allow a customer's router to request a larger allocation like /60 or /56 via a prefix delegation message.