CentOS - Jun 2008 - is it possible to login to a switch via RS232 / serial port from the shell?

Hi all

I have a problem switch in our data centre, which is connected to a 
linux server via a serial cable. I know I can / could access the switch 
from my Windows PC back at the office, using hyperterm, but trying to 
access it using minicom just doesn't seem to work.

I have changed the comms in minincom to use /dev/tty0 & the baud rate to 
9600, yet I can't seem to connect with minicom. Does anyone know how to 
connect to a serial device from the console?

-- 

Kind Regards
Rudi Ahlers
CEO, SoftDux
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Rudi Ahlers wrote:
> Hi all
>
> I have a problem switch in our data centre, which is connected to a 
> linux server via a serial cable. I know I can / could access the 
> switch from my Windows PC back at the office, using hyperterm, but 
> trying to access it using minicom just doesn't seem to work.
>
> I have changed the comms in minincom to use /dev/tty0 & the baud rate 
> to 9600, yet I can't seem to connect with minicom. Does anyone know 
> how to connect to a serial device from the console?
>
try /dev/ttyS0 or /dev/ttyS1 for the serial ports.

> I have changed the comms in minincom to use /dev/tty0 & the baud rate
to
> 9600, yet I can't seem to connect with minicom. Does anyone know how to
> connect to a serial device from the console?
This works for me with our Cisco console cables:
sudo yum install picocom
sudo picocom /dev/ttyS0

BR Bent

Rudi Ahlers wrote:
> Hi all
> 
> I have a problem switch in our data centre, which is connected to a 
> linux server via a serial cable. I know I can / could access the switch 
> from my Windows PC back at the office, using hyperterm, but trying to 
> access it using minicom just doesn't seem to work.
> 
> I have changed the comms in minincom to use /dev/tty0 & the baud rate
to
> 9600, yet I can't seem to connect with minicom. Does anyone know how to
> connect to a serial device from the console?
That should work, but I usually use kermit which has a lot more options 
and is scriptable.

With kermit, try:

set line /dev/ttyS0
set carrier off   (just in case the device doesn't raise CD)
connect

then it is control-] followed by 'c' to get back to kermit.


-- 
   Les Mikesell
    lesmikesell at gmail.com

Rudi Ahlers wrote:
> Hi all
> 
> I have a problem switch in our data centre, which is connected to a
> linux server via a serial cable. I know I can / could access the switch
> from my Windows PC back at the office, using hyperterm, but trying to
> access it using minicom just doesn't seem to work.
issues like this which are not related to CentOS should be marked with
an [OT] tag in the subject line as a start....

-- 
Karanbir Singh : http://www.karan.org/ : 2522219 at icq

Isn't the switch accessible via a Web interface? Most are. If so, why not
use a browser to access it? It is much more practical nowadays.
Of course, I don't know your concrete case, I am thinking generally.
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