Jonathan NAYLOR wrote:
> > 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).
>
> No it works in a much simpler (and cleaner) manner. Its called forwarding in
> the kernel AX.25 code. I think I stole the name from John G8BPQ who also has
> the same feature in his code.
>
> You set up all three TNCs as normal with kissattach, set up your IP routes,
> and all the rest for each port separately.
>
> Then you use forwarding to merge two of the transmit ports into one port. It
> used to be a command in axparms, but as I said the details are sketchy. I
> think I added the feature for Martin G8IMB a few years ago.
>
> In the kernel, each AX.25 device has a structure that has a pointer to another
> device or NULL. If it is NULL (the default) then the port operates normally, but
> if it is not NULL then all transmit packets are sent to the pointed to device
> instead.
>
This seems like a good thing to have described in the new AX.25 HOWTO.
73, Arno pe1icq
