Am 15. Aug 2022, um 08:15:30 Uhr schrieb Tim Woodall: > Isn't the danger here that everybody starts using fd00::/64. Even for > ipv4, the odds of two sets of private addresses colliding should have > been small...
They may collide, but it is not a real problem, because it only affects the situation when 2 sites are connected together. Using random bits avoids such a situation, but if they collide, one of the networks must be changed. > I know there's an RFC for avoiding this but I'll be pleasantly > surprised if it's widely followed as ipv6 starts taking over the bulk > of internet traffic for everything. IPv6 ULA isn't being used for internet traffic, it is intended for traffic within a site, like company network or a home network. If 2 companies use IPv6 ULA with random bits, the probability of a collision is very low if they now interconnect their networks via a direct connection (without internet). Internet traffic uses 2000::/3 and fd00::/7 must not be used for outgoing traffic.
