[address-policy-wg] RE: Question
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Green, David B RDECOM CERDEC STCD SRI
Dave.B.Green at us.army.mil
Tue Apr 11 20:25:05 CEST 2006
>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
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