Re: virtual consoles

A terminal server lets me connect several serial lines to one device
(the terminal server) which is on the network and so from it I can get
to any machine on the network. Something like this but in reverse would
fit the bill: connect the console ports on all the machines to this
device via serial lines, and connect to the device over the network and
somehow select a console connection.

This is just plain telnet, no rocket sience.

Hook up the consols(s) to some terminal server (any newer
server that supports telnet will do) and telnet to to
port.

If you telnet to the standard telnet port (23) on the server
you will reach the admin interface ("console") of the
terminal server itself. The ports usualy has portnumbers
like 3001-3008, 9001-9008 or 10001 - 10008 (for an 8
port server). Check your docs for your server.

From VMS : "$ telnet nn.nn.nn.nn /port=9001" to connect
to port1 on a terminal serber with IP address nn.nn.nn.nn.

Or use your standard VT-emulator, just change to standard
telnet port (23) to the one mathing the wanted port.

For logging and survailance one can also use some software
like "Console Manager" (freeware now if I'm not wrong), but
that isn't needed just for accessing the consoles...

What *can* be a problem is to get all terminal setting right
the whole way between your keyboard and the console port.
Such thing like each character typed beeing doubled is
common. Some fiddling with "local echo" and other settings
might be needed in the emulator.

When using telnet from VMS I usualy do :

$ telnet
telnet> set esc "^D"
escape character set to ^D
telnet> connect <adress_of_the_terminal_server> <portnr>

just to make sure that I have some easy way back...






I have a DECserver 200/MC configured for this:

alp $ latcp show service

Service Name Status Identification
---------------- -----------
-------------------------------------------------
ALP Available COMPAQ Professional Workstation XP1000,
VMS V7.3-
2 (Saint Paul)
DY_CONSOLE Available DY Console
GIMP_CONSOLE Available GIMP Console
IT_CONSOLE Available IT Console
MODEM Available Modem
SPARE_CONSOLE Available Spare Console
WIMP_CONSOLE Available WIMP Console

All the xxx_CONSOLE services are for ports connected to
various system consoles DY is an HP c3700 workstation
(HP-UX), GIMP and WIMP are [Micro]VAXes, IT is an HP zx2000
workstation, and SPARE is currently an IBM Power 275
workstation. I typically connect (SET HOST /LAT xxx_CONSOLE)
from a DECterm when I need to do something on one of these
usually-off systems, but if I had enough idle DECterms, I
could leave one connected to each system.

I assume that with a newer (Telnet-capable) terminal
server, one could connect using Telnet instead of LAT.

On the terminal server (condensed):

Local> show service it_console characteristics

Service: IT_CONSOLE
Identification: IT Console
Ports: 6
Rating: 255
Enabled Characteristics:
Connections, Queuing


Local> show port 6

Port 6: Server: SP2
Character Size: 8 Input Speed: 9600
Flow Control: XON Output Speed: 9600
Parity: None Modem Control: Disabled

Access: Remote Local Switch: None
Backwards Switch: None Name: PORT_6
Break: Local Session Limit: 4
Forwards Switch: None Type: Soft

Preferred Service: ALP

Authorized Groups: 0
(Current) Groups: 0

Enabled Characteristics:

Input Flow Control, Loss Notification, Message Codes,
Output Flow Control, Queuing, Verification


I don't know if that's all optimal, but it seems to do what
I want done.
.

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