From a technical standpoint, can't you multihome and use PA addresses for external comms and also create a numbering solution for provider independent internal numbering for critical systems by using RFC 4193 Unique Local IPv6 Unicast Addresses http://www.ietf.org/rfc/rfc4193.txt ? I thought this RFC was created to handle a provider independent internal numbering solution within a single routing domain (AKA North American Air Traffic Control) or other large critical operations enterprise.
>From RFC 4193:
Local IPv6 unicast addresses have the following characteristics:
- Globally unique prefix (with high probability of uniqueness).
- Well-known prefix to allow for easy filtering at site
boundaries.
- Allow sites to be combined or privately interconnected without
creating any address conflicts or requiring renumbering of
interfaces that use these prefixes.
- Internet Service Provider independent and can be used for
communications inside of a site without having any permanent or
intermittent Internet connectivity.
- If accidentally leaked outside of a site via routing or DNS,
there is no conflict with any other addresses.
- In practice, applications may treat these addresses like global
scoped addresses.
4.2. Renumbering and Site Merging
The use of Local IPv6 addresses in a site results in making
communication that uses these addresses independent of renumbering a
site's provider-based global addresses.
When merging multiple sites, the addresses created with these
prefixes are unlikely to need to be renumbered because all of the
addresses have a high probability of being unique. Routes for each
specific prefix would have to be configured to allow routing to work
correctly between the formerly separate sites.`
Does anyone have a technical analysis of how to multihome with RFC 4193 addresses as a PI address space? Can we combine this with multihomed global addresses to avoid a NAT-like trap that hurts the E2E model? Perhaps we need a MOONv6 experiment designed to test this as a PI space option? David Green US Army CERDEC Site Manager SRI International Office: (732) 532-6715 Mobile: (732) 693-6500