Re: KISS TNC problems with kissattach and mkiss

[Robert Mead <rmead@xxxxxxxxxxxxxxxxx>]

I was finally able to fix this by compiling ax25tools, ax25apps, and libax25 myself. Ubuntu's versions are old. Still not sure why that fixed it, since it seemed to be a kernel-level (miss module) issue.

Running the serial port at 1200bps improved things substantially, as well, but didn't entirely fix it.

-Robert KC2YWE

On Aug 14, 2011, at 11:16 PM, Robert Mead wrote:

> Hey all - I've spent a very frustrating week trying to sort this out, maybe you guys can help:
> 
> I've got a spare laptop in my shack. I tossed Linux (Xubuntu 11.04, 2.6.38) on it to do some packet work, and hooked it up to my TNC-X via a USB/serial dongle.
> 
> I've got my axports file set up properly with my call sign and the configured (by jumper) port speed on the TNC. When I go and run:
> 
> kissattach /dev/ttyUSB0 radio <my AMPR IP address>
> 
> it works. That is, the 'ax0' device shows up in ifconfig, it's listed in 'route', and I can even make connections over it with axcall and read packets in axlisten. 
> 
> That's all fine and dandy, but it stops working very quickly - always within 10 minutes, usually within 5. I'll be playing around with something and get a "Network is down" error, after which the ax0 port has vanished and any ax25 application I try to run will say:
> 
> axconfig: port radio not active  <radio being the name in axports>
> 
> I dug through the kernel log and found this:
> 
> mkiss: ax0: crc mode is auto.
> ADDRCONF(NETDEV_CHANGE): ax0: link becomes ready
> mkiss: ax0: Trying crc-smack
> mkiss: ax0: Trying crc-flexnet
> mkiss: ax0: crc mode is auto
> 
> The duplicate is intentional. It seems to be set to auto at the initial connection (with kissattach), and again at the moment at which the connection stops working.
> 
> Now, if I go and kill 'kissattach', I get to try again - and it works for another few minutes. 
> 
> Do I need mkiss for my single-port TNC? Seems like might just be getting in the way and guessing that my TNC is fancier than it is… 
> 
> I must say I'm utterly flummoxed. The TNC works fine in Windows, and Xastir with a direct serial KISS setup. And what's more, this is relatively new. I set this up originally and ran Xastir over the AX25 port for about 36 hours straight, with no problems, but it hasn't worked since. I even reinstalled the OS to no avail (needed to do it anyway).
> 
> Anyone have any clever ideas? I'm out of places to look.
> 
> Thanks,
> -Robert KC2YWE--
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