Strange SLIP problem

lukas_h · 09-12-2005, 10:40 AM

Hi all

I have two workstations, a dell and some noname machine, both running Ubuntu 5.04 and both equipped with a 16550A UART.
On the noname machine I can establish a SLIP connection to a third device without any problem but on the dell It just won't work. Using kermit I made sure that the UART is ok, but as soon as I fire up slip the serial line seems to be as dead as a doorstop. I connected my scope meter and started to ping the other peer to see whether there is something going on on the serial line - nothing

..
slattach returns no error and according to ifconfig sl0 is setup correctly.

This is my slattach line:

Code:

slattach /dev/ttyS0 -d -L -s115200 -pcslip &> /dev/null &

(which works on the other machine)

and then

Code:

ifconfig sl0 172.16.1.2 pointopoint 172.16.1.1 mtu 1500 &> /dev/null

ifconfig gives me

Code:

sl0       Link encap:VJ Serial Line IP
          inet addr:172.16.1.2  P-t-P:172.16.1.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:6 errors:0 dropped:0 overruns:1 frame:1
             compressed:0
          TX packets:2256 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 compressed:0 txqueuelen:10
          RX bytes:510 (510.0 b)  TX bytes:189504 (185.0 KiB)

Any idea?