draft-ietf-ipngwg-addr-arch-v3-05.txt
Section 2.5.6 (excerpt from RFC2374)‘described fields and their widths are not a fundamental part of the IPv6 architecture’
Implementations should not need to know
Ops community and RIRs deal with this, it is policy
Old-style TLA/NLA/SLA boundaries as example
Now shown as | n | |bits| m bits | p bits | 128-n-m-p bits | +----+-------------------+-----------+----------------------------+ | FP | routing prefix | subnet ID | interface ID | +----+-------------------+-----------+----------------------------+