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HOWTO: Link XRouter (XrPi, XrLin, XrWin) With BPQ
(On the same computer, or across the network)
The best way to do this is via the AXUDP (AX25 over UDP/IP) protocol.
This howto assumes that you are familiar with the basics of XRouter and BPQ.
On the Same Computer:
When both nodes are on the same computer, they can be linked via the operating system's “loopback” interface, usually known as “localhost”.
If we assume that GB7XRP is the XRPi node and GB7BPQ is the BPQ node:
You need the following two lines in BPQ.CFG…
UDP 10093 MAP GB7XRP localhost 9393 B
In the above example, 10093 is the UDP port that BPQ RECEIVES on, and 9393 is the UDP port that BPQ TRANSMITS on to GB7XRP (they are shown as different numbers to avoid confusion, but could be the same).
In XROUTER.CFG you need two things: (a) an AXUDP INTERFACE, and (b) a PORT “attached” to that interface…
INTERFACE=1 ID=AXUDP TYPE=AXUDP MTU=256 ENDINTERFACE PORT=3 ID=Link with GB7BPQ INTERFACENUM=1 IPLINK=localhost UDPLOCAL=9393 UDPREMOTE=10093 ENDPORT
(if you already have an AXUDP interface, you will only need the PORT because the interface will support unlimited ports.)
IPLINK is the ip address or hostname of the other end of the link, in the case BPQ. Since they are both on the same computer, IPLINK should be “localhost” or “127.0.0.1”. The latter is preferable, because it cuts out the domain resolution step.
UDPLOCAL is the UDP port that XRouter RECEIVES on. This must match the UDP port in the BPQ “MAP” line.
UDPREMOTE is the UDP port that XRouter TRANSMITS on. It must match one of the “UDP” lines in BPQ.CFG.