The subnet anycast address and the other ones reserved in
RFC 2526 "Reserved IPv6 Subnet Anycast Addresses"
seems rather analogous to the subnet broadcast address in IPv4 -
basically reserving some bit patterns in the low order bits of the IP
address.
For IPv4 we have RFC 3021 "Using 31-Bit Prefixes on IPv4 Point-to-Point Links"
which works for router-router links by boldly saying that such
links don't have a subnet broadcast address.
Why couldn't we define the /127 prefixes analogous to that - declaring
that such links don't have a subnet anycast address and no reserved ones
either.
Working the same as IPv4 practice can't be a disadvatage.
Erik
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