IP over HF packet, was Re: [HECnet] Area 19

On Nov 2, 2012, at 6:14 PM, Peter Lothberg wrote: If you guys actually try to do DECnet over radio I'd be interested... As long as you have a link-layer that takes a packet in and spit's it out on the other side, taking care of retransmission, FEC coding etc, it should work. More precisely, you need either (a) a point to point reliable channel (analogous to DDCMP) or (b) a multicast datagram channel (analogous to Ethernet). IP over packet radio uses the latter, via the datagram mode of AX.25. That's a reasonable option for DECnet as well if the packet loss rate is low. If it's high, then the connection mode of AX.25 is a more efficient option, in spite of the design bugs that AX.25 inherited from X.25 and HDLC. paul