All, does the DNA Protocol 3 (draft-pentland-dna-protocol3-00.txt) require mobile nodes to implement CPL as a fall-back mechanism for non-DNA routers? Section 7.2 seems to imply that CPL is required, where section 6.2.5 suggests CPL is recommended only. - Christian -- Christian Vogt, Institute of Telematics, University of Karlsruhe www.tm.uka.de/~chvogt/pubkey/