[Testbed-admins] tips device mapping

["Hajime (Jim) Inoue" <hinoue@ccsl.carleton.ca>]

I'm trying to set up a tipserv remotely for a ~90 node emulab.
tips is set up with a 128 port rocketport.  I've rebuilt the
kernel with the proper device drivers.  The devices show up as
cuaRPI* and ttyRPI*, with the tty's having init and lock devices
as well.

My problem is that I do not know how to debug the setup properly,
and how the physical ports map onto the devices.  We have several
nodes powered up, so I've been trying to use the cu command to
connect to those devices.  We've tried

cu -s 115200 -l ttyRPIx

where x is the port we hypothesize our booted node is connected
to, but we don't get a response.  We do get "connected".  But no
interaction is seen.

We've tried various combinations of speeds 9600 and the cua* devices
as well.

Can anyone suggest a way to determine if the device drivers are 
configured properly?  And also, how to map which devices are
connected to which port?

Thanks,
-Jim