We got a definition for "IPv4 realm", based on RFC 2663 (but also RFC 3103).
Both RFC's are IPv4 oriented, not providing an explicit definition for an
"IPv6 realm".
This question might be related to NAT66, because the IPv4 realm concept is
originating from NAT44.
Does anyone know a correspondent definition/reference for IPv6 realm?
If not, I'd like to offer an initial proposal for discussion, - a common realm
term for IPv4 and IPv6:
(IPv4 or IPv6 address) realm: is defined as a set of addresses, which share all
a common prefix, that are mutually reachable (thus, within a single IP routing
domain).
Note: "IPv6 realm" definition based on the GLOBAL UNICAST ADDRESS format (ยง
2.5.4/RFC 4291) because this is a hierarchical format using a "global routing
prefix", which is assigned to a "site" (i.e. sth like a REALM).
Comments would be appreciated,
Albrecht
_____
RFC 2663 IP Network Address Translator (NAT) Terminology and Considerations
2.1. Address realm or realm
An address realm is a network domain in which the network addresses
are uniquely assigned to entities such that datagrams can be routed
to them. Routing protocols used within the network domain are
responsible for finding routes to entities given their network
addresses. Note that this document is limited to describing NAT in
IPv4 environment and does not address the use of NAT in other types
of environment. (e.g. IPv6 environments)
RFC 3103 Realm Specific IP: Protocol Specification
3. Terminology
Private Realm
A routing realm that uses private IP addresses from the ranges
(10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) specified in
[RFC1918 <http://tools.ietf.org/html/rfc1918> ], or addresses that are
non-routable from the Internet.
Public Realm
A routing realm with unique network addresses assigned by the
Internet Assigned Number Authority (IANA) or an equivalent address
registry.
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