4.2 Setting Up the Operating System Console

In the PRIMECLUSTER system, it is recommended that XON/XOFF flow control of the operating system console be disenabled.

In the environment immediately after the Solaris is installed, XON/XOFF flow control is enabled for console messages that are output from the operating system.

Although this setting allows you to stop screen display by pressing the [Ctrl] + [S], it might affect the system by disturbing ongoing operations in the event of a console failure.

To avoid this, you need to disable XON/XOFF flow control for output from the server to the console terminal.

Change the settings in the server and the terminal (remote console connection unit) according to the procedure described below.

Operation Procedure:

Setting up the server
Take the following steps on all servers in the cluster system.
1. Log in using a system administrator access privilege.
2. Edit the "/etc/ttydefs" file.
  Change all lines that begin with "console:" to the following:
```
console:9600 hupcl opost onlcr -ixon:9600::console
```
3. Restart the machine.
```
# shutdown -g0 -i6 -y
```

Setting the remote console connection unit

If a remote console connection unit (RCCU) is connected to each server in the cluster system, perform the following.

Log into the RCCU.

% telnet <RCCU-IP-address> 8010   <-- Enter "telnet RCCU-IP-address 8010" 
                                         and press the [Return] key
Trying <RCCU-IP-address>... 
Connected to <RCCU-IP-address>.
Escape character is '^]'.

login :somebody <-- Enter "somebody" and press the [Return] key
passwd: <-- Press the [Return] key
cs >su <-- Enter "su" and press the [Return] key
passwd: <-- Press the [Return] key

Edit the rs232c.def file.

# edit rs232c.def <-- Enter "edit rs232c.def" and press the [Return] key

0001 # 
Press the [N] key 5 times.
0002 baud 9600
0003 parity none
0004 stop 1
0005 bitchar 8 
0006 flow xon 
Press the [C] key.
0006> flow xon 
0006< flow rxon <-- Enter "flow rxon" and press the [Return] key
0006 flow rxon 
Press the [E] key.
# write <-- Enter "write" and press the [Return] key
writing configuration to flash ROM . done.

Reboot the RCCU.

# reboot               <-- Enter "reboot" and press the [Return] key 
Do you really want to reboot [y/n] ? y    <-- Enter "y" and 
                                                     press the [Return] key

Confirmation of modified settings
Log in again to the console of each server. While executing the command such as "ls -l", press [Ctrl] + [S] and check that the output does not stop.
If the data output stops, review the settings for Step 1 and Step 2 again.