-A P P E N D I X

A P P E N D I X C

Connecting to the Netra 20 Server

This appendix describes how to connect a terminal and other equipment to the external ports on your Netra 20 server.

The appendix contains the following sections:

Connecting to the LOM Serial Port

Connecting to the Serial Ports

POST Output

Connecting to the LOM Serial Port

The LOM serial port is the default console port. To connect a terminal to the LOM serial (RJ45) port you require one of the following:

RJ-45 (male) to DB-25 (male) cable, wired as shown in TABLE C-1

CAT5 Ethernet cable RJ45 (male) to RJ45 (male), part no. 530-2961, and an
RJ45 (female) to DB-25 (male) adaptor, part no. 530-2889, wired as shown in TABLE C-1


RJ-45 (LOM Port)	Signal	DB-25 (Terminal)
1	RTS/CTS	5
2	DTR/DSR	6
3	TXD/RXD	3
4	REF/GND	N/C or GND
5	REF/GND	N/C or GND
6	RXD/TXD	2
7	DSR/DTR	20
8	CTS/RTS	4

To communicate with your Netra 20 server, connect the cable from serial port A on your terminal to the LOM serial port on the Netra 20 server.

1. Power on your terminal and open a window.

2. Connect your Netra 20 server to the mains power supply.

The lom> prompt is displayed on the terminal.

3. Power on the server by pressing the ON switch until the server starts to power up and wait for the ok prompt to appear on the terminal.

Connecting to the Serial Ports

You can also use the Netra 20 serial ports A and B (ttya and ttyb) as a console port. You require one of the following:

DB-25 male to DB-25 (male) crossover cable wired as shown in TABLE C-2

DB-25 (male) to DB-25 (male) straight through cable with a crossover adaptor wired as shown in TABLE C-2


DB-25 (Netra 20)	Signal	DB-25 (Terminal)
1		1
2	RXD/TXD	3
3	TXD/RXD	2
4	RTS/CTS	5
5	CTS/RTS	4
6	DSR/DTR	20
7	GND/GND	7
8	DCD/DTR	20
20	DTR/DSR	6
20	DTR/DCD	8

You must also configure the Netra 20 serial port as the input and output device:

ok setenv input-device ttya

ok setenv output-device ttya

Note - Tip hardware usually defaults to serial port B (ttyb).

POST Output

To obtain POST output you must set configuration variable diag-switch? to true, either from the ok prompt:

ok setenv diag-switch? true

or from the shell prompt:

# eeprom diag-switch?=true

You should also set auto-boot? to false since, using the default settings, the system attempts to boot from the net when diag-switch? is true.

To run POST, power cycle the system; a reset is not sufficient.

By default, the POST output is directed to the LOM console port, which shares LOM event reporting with normal console activity. To direct POST output to the ttya, set the configuration variable diag-out-console to true, either from the ok prompt or the shell prompt, as described above.