Look at the "cc" line of this email. On Apr 30, 2010, at 3:11 AM, Keith Moore wrote:
> Why is there a need for such a concept as "IPv6 realm"? > > It seems to me that if we ever create IPv6 realms in the sense that realms > exist in IPv4 (i.e. if we make IPv6 addresses ambiguous), we've irrevocably > broken IPv6. > > And if we end up creating a subtly different concept in IPv6 - something like > realms without the potential for address assignment conflicts - it will be > confusing to call such things realms. > > But I really think the right thing to do is to make explicit that there is > only one "realm" for the entire IPv6 address space. > > Keith >> 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 >> ], 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. >> >> >> >> _______________________________________________ >> nat66 mailing list >> >> [email protected] >> https://www.ietf.org/mailman/listinfo/nat66 > _______________________________________________ > nat66 mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/nat66 http://www.ipinc.net/IPv4.GIF _______________________________________________ nat66 mailing list [email protected] https://www.ietf.org/mailman/listinfo/nat66
