On 2023-04-28 12:39, Lew Wolfgang wrote:

My experience is with a large dual-stack network that has several
class B IPv4 networks.  Router advertisements seem to be slow and
unreliable, for one thing.  Old protocols not supporting v6 are also
an issue.  Then there was the time when a user could mis-configure
their Windows computer to turn it into a router that led to a dead end.
Random network freezes were the result.  What's to prevent a bad actor
who managed to gain physical access from installing her own router
and then siphon off traffic for their own ill deeds?

Multiple class B?  Those are huge.  BTW, address classes have been obsolete for decades.  Now it's CIDR.

* avoid problems when the ipv4 pool is exhausted.

But that's why God invented NAT!

I thought NAT was a curse from the network gods.

With IPv6, the Internet works the way the it's supposed to, that is transparent end to end.