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Specific Recommendations for Improving Network Feedback to Hosts.

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Final rept.

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This report provides recommendations for improving the feedback from the DDN network switching resources, IMPs, to their attached gatewayshosts so that hte internetwork as a whole can function more efficiently and effectively. The report begins with a general description of the current internetworking environment. Problem areas in designing a efficient packet switching network or internetwork are identified along with potential improvements to current internetworking control mechanisms in the areas of flow control congestion control, type of service routing, uses of multipath routing and the impactuse of the new IMP end-to-end protocol. Emphasis is placed on the uses of the IMP end-to-end protocol to provide statistics about the network and on the DDN X.25 access protocol as the medium for passing this information to the gateways and hosts. Several approaches and techniques were identified which could improve the efficiency and effectiveness of the DoD internetwork and the DDN specifically. The main information required by the hosts is readily available within the IMP, or at least will be available as the new IMP end to end protocol is introduced later this year. In order to develop new control algorithms, delaycapacity statistics need to be collected and analyzed. Network feedback mechanisms are proposed which would allow operational hostgateways to obtain the network delaycapacity parameters needed for optimal route selection, flow control, congestion control, etc. Keywords include Computer networks, Defense data network, Internetworking, and Gateways.

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  • Computer Systems

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