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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 3 Assigning the Switch IP Address and Default Gateway
Assigning Switch Information
• Initializes the flash file system on the system board.
• Loads a default operating system software image into memory and boots the switch.
The boot loader provides access to the flash file system before the operating system is loaded. Normally,
the boot loader is used only to load, uncompress, and launch the operating system. After the boot loader
gives the operating system control of the CPU, the boot loader is not active until the next system reset
or power-on.
The boot loader also provides trap-door access into the system if the operating system has problems
serious enough that it cannot be used. The trap-door mechanism provides enough access to the system
so that if it is necessary, you can format the flash file system, reinstall the operating system software
image by using the XMODEM Protocol, recover from a lost or forgotten password, and finally restart
the operating system. For more information, see the
“Recovering from Corrupted Software By Using the
Xmodem Protocol” section on page 42-2 and the “Recovering from a Lost or Forgotten Password”
section on page 42-3.
Note You can disable password recovery. For more information, see the “Disabling Password Recovery”
section on page 7-5.
Before you can assign switch information, make sure you have connected a PC or terminal to the console
port, and configured the PC or terminal-emulation software baud rate and character format to match
these of the switch console port:
• Baud rate default is 9600.
• Data bits default is 8.
Note If the data bits option is set to 8, set the parity option to none.
• Stop bits default is 1.
• Parity settings default is none.
Assigning Switch Information
You can assign IP information through the switch setup program, through a DHCP server, or manually.
Use the switch setup program if you want to be prompted for specific IP information. With this program,
you can also configure a hostname and an enable secret password. It gives you the option of assigning a
Telnet password (to provide security during remote management). For more information about the setup
program, see the “Configuring the Switch with the CLI-Based Setup Program” appendix in the hardware
installation guide.
Use a DHCP server for centralized control and automatic assignment of IP information after the server
is configured.
Note If you are using DHCP, do not respond to any of the questions in the setup program until the switch
receives the dynamically assigned IP address and reads the configuration file.
If you are an experienced user familiar with the switch configuration steps, manually configure the
switch. Otherwise, use the setup program described previously.