Chapter 4 Assigning The Switch Ip Address And Default Gateway; Understanding The Boot Process - Cisco WS-C3550-12G Software Configuration Manual

Assigning the Switch IP Address and Default
Gateway
This chapter describes how to create the initial switch configuration (for example, assign the switch IP
address and default gateway information) by using a variety of automatic and manual methods. It also
describes how to modify the switch startup configuration.
For complete syntax and usage information for the commands used in this chapter, refer to the
Note
Catalyst 3550 Multilayer Switch Command Reference for this release.
This chapter consists of these sections:
Understanding the Boot Process, page 4-1
•
Assigning Switch Information, page 4-2
•
Checking and Saving the Running Configuration, page 4-10
•
Modifying the Startup Configuration, page 4-12
•
Scheduling a Reload of the Software Image, page 4-17
•

Understanding the Boot Process

Before you can assign switch information (IP address, subnet mask, default gateway, secret and Telnet
passwords, and so forth), you need to install and power on the switch as described in the hardware
installation guide that shipped with your switch.
The normal boot process involves the operation of the boot loader software, which performs these
activities:
Performs low-level CPU initialization. It initializes the CPU registers, which control where physical
•
memory is mapped, its quantity, its speed, and so forth.
Performs power-on self-test (POST) for the CPU subsystem. It tests the CPU DRAM and the portion
•
of the Flash device that makes up the Flash file system.
Initializes the Flash file system on the system board.
•
Loads a default operating system software image into memory and boots the switch.
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Catalyst 3550 Multilayer Switch Software Configuration Guide
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