freebsd stable - Jun 2006 - How to enter DDB through a terminal server / remote console ... ?

'k, now that I'm up to 3 6-STABLE servers that are deadlocking, I'm 
spending time with the remote tech today to get a serial console put 
online ... how do I drop into DDB remotely, where the serial console is 
going through a Portmaster Terminal server?  issuing CTL-ALT-ESC, I doubt, 
will work, will it?

Thx

----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email . scrappy@hub.org                              MSN . scrappy@hub.org
Yahoo . yscrappy               Skype: hub.org        ICQ . 7615664

On Wed, 28 Jun 2006, User Freebsd wrote:
> 'k, now that I'm up to 3 6-STABLE servers that are deadlocking,
I'm spending
> time with the remote tech today to get a serial console put online ... how 
> do I drop into DDB remotely, where the serial console is going through a 
> Portmaster Terminal server?  issuing CTL-ALT-ESC, I doubt, will work, will 
> it?
If configured to use a serial console (console="comconsole" in
loader.conf),
you can enter the debugger with BREAK_TO_DEBUGGER in the kernel config by 
sending a serial break.  With my portmasters, I telnet to a TCP port to 
connect to the serial console, so I send a telnet break, using ^]send break.

Robert N M Watson
Computer Laboratory
University of Cambridge