Re: USB host-to-host console

[Clemens Koller <clemens.koller@xxxxxxxxxxx>]

David Turvene schrieb:
> On Sat, 2007-08-18 at 21:55 +0200, Guennadi Liakhovetski wrote:
>>> What are my hardware/software/configuration options for local comms
>>> (primary ethernet network down) between my laptop with only USB ports to
>>> a headless server with only USB ports?
>> Your another option would be to provide each your server with a 
>> USB-to-serial dongle similar to the one you use with your laptop, and 
>> specify "console=ttyUSB0,..." on server's kommand line (if you want a 
>> console on it) and start a getty on it from /etc/inittab just as usual.
>>
>> Thanks
>> Guennadi
> 
> 
> Thanks for the reply.  That seems to be a good solution - effectively
> two back-to-back USB-serial cables (e.g. what I use now, a Belkin
> F5U109).  It seems so obvious with the pervasiveness of USB that I am
> concerned about the seeming lack of implementations (at least there is
> little in the HOWTOs and newsgroups).  Am I missing something?  I have a
> hard time believing there are small server sites that do not have this
> issue.
> 
> Maybe a PPP connection over USB is the preferred solution?  I have done
> this with a PDA (Intel PXA255) but that contains a gadget controller.

There is something like a USB "Communication Device Class" (CDC) which
should allow you to implement a serial console without the need for a RS232
physical layer of all the USB-serial converters (FTDI, Keyspan, ...).

See:
http://en.wikipedia.org/wiki/USB_communications_device_class

Regards,
-- 
Clemens Koller
__________________________________
R&D Imaging Devices
Anagramm GmbH
Rupert-Mayer-Straße 45/1
Linhof Werksgelände
D-81379 München
Tel.089-741518-50
Fax 089-741518-19
http://www.anagramm-technology.com

-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >>  http://get.splunk.com/
_______________________________________________
Linux-usb-users@xxxxxxxxxxxxxxxxxxxxx
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-users