[manet] MANET Internetworking

Hi, during my talk at the Tuesday MANET session there were questions about my charts where I showed two disjoint MANETs using a wide area Internetwork (e.g., the global Internet) as transit (charts here):

https://datatracker.ietf.org/meeting/122/materials/slides-122-manet-manet-internetworking-01

One question asked why not just connect up the two MANETs with a BGP or OSPF router and have MANET1 <-> MANET2 communications go directly across the connecting router without having to transit the wide aera Internetwork?

The answer is that MANETs typically operate under de-aggregated address spaces where most/all routing information exchanged is for IPv6 /128 or IPv4 /32 prefixes ("host routes") with no fixed topology reference points. So, there would be no way for a connecting BGP/OSPF router to represent MANET1 as a small set of aggregated IP prefixes to MANET2 and vice-versa without redistributing all host routes between the two MANETs. And, redistributing host routes would cause the MANET routing protocols (e.g., OSPF-MDR, OLSRv2, etc.) to have to carry excessive routing protocol information over potentially performance-limited radio frequency links.

Instead, MANET aggregation is through intermittent or continuous connectivity through Internetwork Proxy/Servers that represent each MANET as an aggregated IP prefix to the rest of the Internetwork. MANET routers can further register end user networks with Internetwork Proxy/Servers based on Provider-Independent IP prefixes delegated to them by a mobility service that supports full Distributed Mobility Management (DMM).

Another comment was made about past efforts in the Autoconf intarea working group. We have already been there and declared success through the publication of RFC5889 where the "host route" IP addressing model for Ad Hoc Networks is articulated. This publication already provides sufficient guidance that we do not need to go back and re-open that group.

Thank you - Fred

https://datatracker.ietf.org/doc/draft-templin-6man-mla/
https://datatracker.ietf.org/doc/draft-templin-6man-aero3/
https://datatracker.ietf.org/doc/draft-templin-6man-omni3/

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