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EB7CJO > PSBBS    30.07.96 19:42l 36 Lines 1171 Bytes #-8882 (0) @ WW
BID : 43253_EA7RKC
Read: DO3SMK GUEST
Subj: TCP/IP needs AX25
Path: DB0AAB<DB0MFG<OE7XCI<IW3AQL<IN3TUR<IT9PKB<IT9CGH<SV1BKN<EA7RKC
Sent: 960715/1538Z @:EA7RKC.EACA.ESP.EU #:43253 [R.C. C diz (F.A.R)] $:43253_EA
From: EB7CJO@EA7RKC.EACA.ESP.EU
To  : PSBBS@WW


>From: SQ6BOT @ SR6BOX.#WRO.POL.EU  (Zipu)
>To  : PSBBS @ WW

>...and TCP/IP without AX.25 shell should be the main protocol in packet
>radio net... But how to change it?

  Well, this is not correct.  As any communication protocol, you need a Level
2 protocol if you're using Level3.  Ax.25 is L2 protocol for packet radio, the
only I know, and TCP/IP doesn't specify such a protocol.

  As any level, it must add a header which, in case of AX.25, consists of
callsigns mainly.  When the L2 layer receives a L2 header with its address
in the destination field, pass it to L3 layer.

  AX.25 is not too much load, specially if you're using conectionless mode
(Unprotoc L2 packets), but as L2 headers are shorter than TCP/IP ones, it is
a good idea to handle packet rejecting and such mechanisms of AX.25 instead
of TCP/IP ones.

   73 & have a good FWD de EB7CJO :
   ___              __
    /_ _   _   _'  /   _   _   / _   _
 \_/  (_)_/_)_(/_  \__(_\_/ (_(_(_)_/_)

   Cadiz, 14-07-1996 - 09:41:36 (EA)

 AX.25 ->   eb7cjo @ ea7rkc.eaca.esp.eu
 EMail ->    cramirez@hercules.uca.es
               cramirez@arrakis.es



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