Linux-Hams archive - May 1999: AX.25 virtual circuit across multiple ports

AX.25 virtual circuit across multiple ports

Robin Gilks (tvzzdni@kerailya.tunkki.fi)
Wed, 5 May 1999 15:03:00 +0100


Greetings all

I'm in the process of installing several full-duplex links which nearly
all consist of a single TX and 2 or 3 RX at each site. I would like
to experiment with using virtual circuit on these links but only one
leg at each site will be using the TX & RX on the same physical port.

Is there a way of establishing an AX25 circuit where the RX may be
coming back on a different port? I can do it using JNOS with a
multiple port KISS TNC device by *not* attaching the second port
whereby JNOS defaults to thinking any traffic on the unattached
port is on the 'master' KISS port. Does Linux behave in a similar fashion?
(not very likely methinks).

I'm hoping that these experiments (if I can carry them out) will prove
that virtual circuit carrying IP works fine provided the multiple packet
TX transmission delay is removed by the use of full-duplex.

Cheers

--
73 de Robin. G8ECJ                      Hub manager gb7ipd

NTS: G8ECJ@GB7TVG.#42.GBR.EU AmprNet: wcmpflr@auran.com Internet: qnjmdv@cortland.com http://www.gb7ipd.freeserve.co.uk/ Shack: (+44) 1628 533311 Fax: (+44) 1628 850165 Club pages (g4xyw modem etc) at http://www.tvipug.freeserve.co.uk