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Proactive Approach for DNA - Preliminary Overview - March 2, 2004 Eunsoo Shim Kyungtae Kim Jens-Peter Redlich Richard D. Gitlin NEC Labs America, Inc. Possible Approaches for DNA Reactive Approach Proactive Approach Acquire all the necessary information after the link change has occurred (Probably after the L2 trigger). o The whole DNA process is in the time-critical path. Acquire (some of ) the necessary information before the link change and use it for the DNA process after the link change. o Complementary to the reactive approach. Embedding L3 info into L2 Approach Acquire (all or most of) the necessary information from the L2 messages or L2 Trigger 03/02/2004 Proactive Approach for DNA Detecting establishment of a new link Checking the subnet of the new link Checking the validity of the current IP configuration Acquiring Information for the new IP configuration 2 How to Get Information about the Neighbors Memorized information about the old links (locally stored and managed by the MN) Limited by the roaming history of the MN. Information provisioning by the network Possible tool: Candidate Access Router Discovery (CARD) Protocol o Submitted to the IESG for an experimental RFC recently. o The CARD protocol provides means to request and deliver the information between the MN and the current AR. o Need more work for DNA • 03/02/2004 Ex. Defining the information types and their formats, Proactive Approach for DNA 3