[Xastir] Digipeating

[Gerry Creager n5jxs]

Problem arises when you run aprsd as an APRS-IS server and then lose 
efficiency due to the loops it tolerates.  If you really need the server 
component, get the Java server...

gerry

J. Lance Cotton wrote:
> Curt, WE7U wrote:
> 
>> Another method would be to run digi_ned and aprsd on the Linux box,
>> then connect all the APRS clients to the aprsd instance.  The later
>> versions of aprsd allow using the AX.25 networking ports to talk to
>> the TNC's, so aprsd and digi_ned should be able to co-exist.
> 
> 
> The above method is the one described in the DIGI_NED documentation as a 
> way to run both a client and DIGI_NED or to run an igate and DIGI_NED.
> 
> The idea is that aprsd is the master controller and it talks to:
> 1) DIGI_NED through a pty (pseudo-tty: a loopback type of connection)
> 2) An APRS-IS server through the normal aprsd method
> 3) A client such as Xastir through either a pty or a Inet port
> 
> Or something like that. From DIGI_NED's point of view, it has 2 ports: 
> one is the AX.25 device and the other is the aprsd messaging port. If 
> something needs to be igated, aprsd spits it over to DIGI_NED who then 
> takes care to pack it in third-party format and dumps it to the radio 
> port with the proper paths for your area (meaning you can have third 
> party messages go out with 0, 1, 2, whatever number of hops)
> 
> DIGI_NED would also be configured to digipeat EVERYTHING from the radio 
> port to the aprsd port.
> 
> Xastir connects to a full-feed port on aprsd, where it sees data from 
> the incoming bit of the DIGI_NED<->aprsd link, plus any Inet data from 
> aprsd's APRS-IS connection. Xastir would have ALL igating and relay 
> digipeating turned off.
> 
> The one downside to this, other than the complexity, is that Xastir can 
> no longer tell you which packets were heard via TNC or Inet.
> 
> -Lance KJ5O


-- 
Gerry Creager -- gerry.creager at tamu.edu
Network Engineering -- AATLT, Texas A&M University	
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