Technical data

2-2 Fabric OS Administrator’s Guide
Publication Number: 53-0000518-09
Connecting to the Command Line Interface
2
Observe these considerations for telnet connections:
• Never change the IP address of the switch while two telnet sessions are active; if you do, your next
attempt to log in fails. To recover, gain access to the switch by one of these methods:
- You can use Web Tools and perform a fast boot. When the switch comes up, the telnet quota is
cleared. (For instructions on performing a fast boot with Web Tools, refer to the Web Tools
Administrator’s Guide.)
- If you have the required privileges, you can connect through the serial port, log in as root, and
use operating system commands to identify and kill the telnet processes without disrupting
the fabric.
• For admin level accounts, Fabric OS limits the number of simultaneous telnet sessions per switch
to two. For more details on session limits, refer to “Configuring the Telnet Interface” on page 3-3
and “Creating and Maintaining User-Defined Accounts” on page 3-6.
To connect through the serial port
1. Connect the serial cable to the serial port on the switch and to an RS-232 serial port on
the workstation.
If the serial port on the workstation is RJ-45 instead of RS-232, remove the adapter on the end of
the serial cable and insert the exposed RJ-45 connector into the RJ-45 serial port on
the workstation.
2. Open a terminal emulator application (such as HyperTerminal on a PC, or TERM, TIP, or Kermit in
a UNIX environment), and configure the application as follows:
• In a Windows environment:
• In a UNIX environment, enter the following string at the prompt: tip /dev/ttyb -9600.
If ttyb is already in use, you can use ttya (enter tip /dev/ttya -9600).
Observe these considerations for serial connections:
• Some procedures require that you connect through the serial port; for example, setting the IP
address or setting the boot PROM password.
• If secure mode is enabled, connect through the serial port of the primary FCS switch.
• SilkWorm 3016: This model does not have an external serial port.
• SilkWorm 12000, 24000, and 48000: You can connect to CP0 or CP1 using either of the two
serial ports.
Parameter Value
Bits per second 9600
Databits 8
Parity None
Stop bits 1
Flow control None