Re: Remote target behind console server

[Quality Quorum <qqi at theworld dot com>]

On Wed, 3 Jul 2002, KONG, Gangfeng wrote:

>
> > >
> > > Hi,
> > >
> > > I start the gdb stub on the target by:
> > >          gdbstart -s 38400 -t /dev/ttyS0
> > > and start the gdb on the development box by:
> > >          gdb vmlinux
> > >          gdb)
> > >          gdb) set remotebaud 38400
> > >          gdb) target remote my-server-ipaddr:port  #note, the port I put
> > > here is the serial port# on the server,
> > >                                                  #not L4 port, correct?
> >
> >No, you have to use telnet port here.
>
> Hi,
>
> normally, I use the command:
>          telent server-ipaddr 2001
> to access its port 1. (2002 for port 2, 2003 for port 3 ...)
>
> It looks like console server already map its L4 port into serial port.

I suppose that L4 means port 4 on the server and /dev/ttyS0 on the target
then you have to use 'target server-ipaddr 2004'.


If L4 means something else, then use another port.


How to debug a connection:

1. Make sure that terminal server is properly configured and the
   cable is good:  connect port 4 on the terminal server to the some known
   working target, e.g. standar UNIX serial port, do 'telnet server-ip
   2004' and type stuff on console and check responses.

2. Make sure that gdb stub is workin properly: connect port 4 on the
   terminal server to debug port on the targe, start gdb stub, again do
   'telnet server-ip 2004' and make sure that by hitting return you
   cause gdb to send you properly formed packets.

3. Start gdb and do 'target remote server-ip:2004' I would be very
   surprised if it does not work at the point.

>
> Thanks
> GF
>

Thanks,

Aleksey