Beginner tutorial on manipulating settings within a Cisco Catalyst 3550

Configure the first ethernet port on a cisco Catalyst 3550 to participate in voice vlan "51":

BW-Switch1>show version
Cisco Internetwork Operating System Software
IOS (tm) C3550 Software (C3550-I9Q3L2-M), Version 12.1(12c)EA1, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Sun 24-Nov-02 23:58 by antonino
Image text-base: 0x00003000, data-base: 0x006077A8

ROM: Bootstrap program is C3550 boot loader

BW-Switch1 uptime is 7 weeks, 3 days, 19 hours, 0 minutes
System returned to ROM by power-on
System image file is "flash:c3550-i9q3l2-mz.121-12c.EA1/c3550-i9q3l2-mz.121-12c.EA1.bin"

cisco WS-C3550-24-PWR (PowerPC) processor (revision B0) with 65526K/8192K bytes of memory.
Processor board ID CAT0716Z00K
Last reset from warm-reset
Running Layer2/3 Switching Image

Ethernet-controller 1 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 2 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 3 has 1 Gigabit Ethernet/IEEE 802.3 interface

Ethernet-controller 4 has 1 Gigabit Ethernet/IEEE 802.3 interface

24 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)

The password-recovery mechanism is enabled.
384K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:0C:CE:3C:A2:00
Motherboard assembly number: 73-8100-07
Power supply part number: 341-0029-01
Motherboard serial number: CAT07150T72
Power supply serial number: LIT071101B0
Model revision number: B0
Motherboard revision number: A0
Model number: WS-C3550-24PWR-SMI
System serial number: CAT0716Z00K
Configuration register is 0x10F

BW-Switch1>enable
Password:
BW-Switch1#show running-config
Building configuration...

Current configuration : 6147 bytes
!
version 12.1
no service single-slot-reload-enable
no service pad
service timestamps debug uptime
service timestamps log datetime localtime
service password-encryption
!
hostname BW-Switch1
!
logging buffered 90000 debugging
no logging console
enable secret 5 $1$EyB/$BOu20Nw37JosQzErDDivx!
enable password 7 82201D0A0A49
!
clock timezone EST -4
clock summer-time EST recurring
ip subnet-zero
no ip domain-lookup
!
udld enable

!
spanning-tree extend system-id
!
!
interface FastEthernet0/1
description To SSP
no switchport    <--- we're going to change this
no ip address
spanning-tree portfast
!
interface FastEthernet0/2
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport mode trunk
switchport voice vlan 51
switchport priority extend cos 0
no ip address
spanning-tree portfast
!
interface FastEthernet0/3
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport mode trunk
switchport voice vlan 51
switchport priority extend cos 0
no ip address
spanning-tree portfast
!
......

BW-Switch1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
BW-Switch1(config)#interface FastEthernet 0/1
BW-Switch1(config-if)#switchport
BW-Switch1(config-if)#switchport voice vlan 51
BW-Switch1(config-if)#^Z
BW-Switch1#show running-config
Building configuration...

Current configuration : 6147 bytes
!
version 12.1
no service single-slot-reload-enable
no service pad
service timestamps debug uptime
service timestamps log datetime localtime
service password-encryption
!
hostname BW-Switch1
!
logging buffered 90000 debugging
no logging console
enable secret 5 $1$EyB/$BOu20Nw37JosQzErDDivx!
enable password 7 82201D0A0A49
!
clock timezone EST -4
clock summer-time EST recurring
ip subnet-zero
no ip domain-lookup
!
udld enable

!
spanning-tree extend system-id
!
!
interface FastEthernet0/1
description To SSP
switchport voice vlan 51
no ip address
spanning-tree portfast
!
interface FastEthernet0/2
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport mode trunk
switchport voice vlan 51
switchport priority extend cos 0
no ip address
spanning-tree portfast
!
interface FastEthernet0/3
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport mode trunk
switchport voice vlan 51
switchport priority extend cos 0
no ip address
spanning-tree portfast
!
......

BW-Switch1#write memory
Building configuration...
[OK]
BW-Switch1#exit

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