Initial Configuration for the Switch
Revised: October 27, 2011
This chapter provides a quick step-by-step initial setup procedure for a switch.
These steps describe how to do a simple installation:
1. Connecting to the Switch
2. Starting the Terminal-Emulation Software
3. Connecting to a Power Source
4. Entering the Initial Configuration Information
Note If you are using a DC power supply, see the "Connecting DC Power to the Switch" section for more information about setting up your switch with a DC power supply.
Note You need to provide the console cable and the Category 5 straight-through cables to connect the console port to a PC and switch ports to Ethernet devices.
Connecting to the Switch
You must use the console port to perform the initial configuration. To connect the switch console port to a PC, use an RJ-45-to-DB-9 adapter cable (optional; not supplied as part of the chassis accessory kit).
Follow these steps to connect the PC or terminal to the switch:
Step 1 Using an RJ-45-to-DB-9 adapter cable, insert the RJ-45 connector into the console port that is located on the front of the switch, as shown in Figure B-1.
Step 2 Attach the DB-9 female DTE of the adapter cable to a PC serial port, or attach an appropriate adapter to the terminal.
Figure B-1 Connecting a Switch to a PC
RJ-45-to-DB-9 adapter cable
Starting the Terminal-Emulation Software
Before you power on the switch, start the terminal-emulation session so that you can see the output display from the power-on self-test (POST).
The terminal-emulation software—frequently a PC application such as Hyperterminal or ProcommPlus—makes communication between the switch and your PC or terminal possible.
Step 1 Start the terminal-emulation program if you are using a PC or terminal.
Step 2 Start a terminal-emulation session.
Step 3 Configure the baud rate and character format of the PC or terminal to match these console port default characteristics:
•8 data bits
•1 stop bit
•None (flow control)
Connecting to a Power Source
Follow these steps to connect to a power source:
Step 1 If you are using an AC power supply, connect one end of the supplied AC power cord to the power connector on the switch rear panel, and then connect the other end of the power cable to a grounded AC outlet. (See Figure B-1.)
Step 2 If you are using a DC power supply, see the "Connecting DC Power to the Switch" section for instructions on how to install the DC power supply.
As the switch powers on, it begins the POST, a series of tests that runs automatically to ensure that the switch functions properly.
POST lasts approximately 1 minute. After POST is complete, the system and status LEDs remain green (see the "Front Panel LEDs" section for more information).
If the switch fails POST, the system LED turns amber.
Note POST failures are usually fatal. Call Cisco Systems if your switch does not pass POST.
If you started the terminal-emulation program before you powered on your switch, the PC or terminal displays the bootloader sequence. Press Enter to display the setup program prompt.
Entering the Initial Configuration Information
To set up the switch, you need to assign an IP address and other configuration information necessary for the switch to communicate with the local routers and the Internet. The minimal configuration provided here does not cover most of the features, it simply allows you to preform other configuration tasks using a telnet connection from your management network. To configure other features and interfaces, please refer to the Catalyst 4500 Series Switch Software Configuration Guide.
Obtain this information from your network administrator:
•Switch IP address
•Subnet mask (IP netmask)
•Default gateway (router)
•Enable secret password
Performing the Initial Configuration
Follow these steps to complete the initial configuration for the switch:
Step 1 At the terminal prompt, enter the enable command to enter privileged exec mode:
Step 2 Set the system time using the clock set command in privileged EXEC mode.
Switch# clock set 20:09:01 3 Apr 2006
Step 3 Verify the change by entering the show clock command.
20:09:06.079 UTC Thu Apr 3 2006
Step 4 Enter the configure terminal command to enter global configuration mode.
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Step 5 Configure a host name for the switch, and press Return.
Switch (config)# hostname Switch1
Step 6 Configure the system prompt for the switch, and press Return. To remove the new prompt and return the prompt to its default, use the no prompt command.
Switch (config)# prompt Switch1>
Step 7 Use the banner motd global configuration command to set location information in the login banner. You can also set a system contact using this command.
Switch1(config)# banner motd c 170 West Tasman Drive, San Jose, CA c
Switch1 (config)# banner motd c 170 West Tasman Drive, San Jose, CA;
Tech Support 408 123 4567 c
Step 8 Configure an enable secret password, and press Return.
The password can be from 1 to 25 alphanumeric characters, can start with a number, is case sensitive, allows spaces, but ignores leading spaces. The secret password is encrypted and the enable password is in plain text.
Switch1 (config)# enable secret SecretPassword
Step 9 Configure an enable password, and press Return.
Switch1 (config)# enable password EnablePassword
Step 10 Configure a virtual terminal (Telnet) password, and press Return.
The password can be from 1 to 25 alphanumeric characters, is case sensitive, allows spaces, but ignores leading spaces.
Switch1 (config)# password terminal-password
Switch1 (config)# line vty 0 15
Step 11 Configure the interface that connects to the management network. (The IP address and subnet mask shown are for example only. Use an address appropriate for your network.)
Switch1 (config)# ip routing
Switch1 (config)# interface gigabitethernet 24
Switch1 (config-if)# no switchport
Switch1 (config-if)# no shutdown
Switch1 (config-if)# ip address 10.4.120.106 255.0.0.0
Switch1 (config-if)# exit
Step 12 Exit from global configuration mode:
Step 13 View the configuration you just created and confirm that it is what you want.
170 West Tasman Drive, San Jose, CA ^C
Step 14 Verify the IP information by using the show ip interface brief and show ip route commands.
Switch1# show ip interface brief
Interface IP-Address OK? Method Status
Vlan1 172.16.1.2 YES manual up
FastEthernet1 unassigned YES unset up
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B -
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - ISIS level-1, L2 - ISIS level-2, ia - ISIS
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is 172.16.1.1 to network 0.0.0.0
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Vlan1
S* 0.0.0.0/0 [1/0] via 172.16.1.1
Step 15 Save the running configuration:
Switch1# copy system:running-config nvram:startup-config
You have now completed the initial configuration of the switch.
To use the CLI to perform additional configuration or management tasks, enter commands at the Switch> prompt through the console port by using a terminal program or through the network by using Telnet. For configuration information, refer to the switch software configuration guide or the switch command reference.