Comando Basicos De Un Switch
Enviado por wesark • 12 de Marzo de 2014 • 5.467 Palabras (22 Páginas) • 452 Visitas
Comandos Básicos de Switch Catalyst 2950
Lab 6.14: Connecting to the 2950 Switch and Setting Passwords
This lab will have you connect to a 2950 switch, enter global configuration mode and then set the passwords.
1. Open up a 2950 switch from the RouterSim Network Visualizer screen.
2. Press enter to connect to the console
Switch>
3. For the usermode of the switch, you can use the help screen just like a router.
Switch>?
Exec commands:
<1-99> Session number to resume
access-enable Create a temporary Access-List entry
clear Reset functions
connect Open a terminal connection
disable Turn off privileged commands
disconnect Disconnect an existing network connection
enable Turn on privileged commands
exit Exit from the EXEC
help Description of the interactive help system
lock Lock the terminal
login Log in as a particular user
logout Exit from the EXEC
name-connection Name an existing network connection
ping Send echo messages
rcommand Run command on remote switch
resume Resume an active network connection
show Show running system information
systat Display information about terminal lines
telnet Open a telnet connection
terminal Set terminal line parameters
traceroute Trace route to destination
tunnel Open a tunnel connection
--More--
4. The first thing that you should configure on a switch is the passwords. You don’t want unauthorized users connecting to the switch. You can set both the user mode and privileged mode passwords, just like a router. Enter enable mode by using the enable command and then enter global configuration mode by using the config t command. The switch following output shows an example of how to get into enable mode, and then into global configuration mode.
Switch>enable
Switch#config t
Enter configuration commands, one per line. End with CTRL/Z
Switch(config)#
5. Once you are in global configuration mode, you can set the user mode and enable mode passwords by using the enable password and enable secret command. The switches output below shows the configuration of both the user mode and enable mode passwords.
Switch(config)#enable password ?
0 Specifies an UNENCRYPTED password will follow
7 Specifies a HIDDEN password will follow
LINE The UNENCRYPTED (cleartext) 'enable' password
level Set exec level password
Switch(config)#enable password todd
Switch(config)#enable secret cisco
Switch(config)
6. Remember, if you set your enable secret, the enable password is superceded and not used, just like in a router.
7. In addition to the enable password and enable secret, the 2950 allows you to set a console and telnet password as well using the line commands, just like in a router.
Switch(config)line ?
<0-16> First Line number
console Primary terminal line
vty Virtual terminal
Switch(config)#line console 0
Switch(config-line)# password console
Switch(config-line)#login
Switch(config-line)#line vty ?
% Unrecognized command
8. Remember that just like in a router, you cannot get help for a line command from within line configuration mode. Type exit to go back one step.
Switch(config-line)#exit
Switch(config)#line vty ?
<0-15> First Line number
Switch(config)#line vty 0 15
Switch(config-line)# password telnet
Switch(config-line)#login
Switch(config-line)#cntrl+z
Switch#
9. You can use show running-config (show run for short) to see the current configuration on the switch.
Current configuration : 997 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Switch
!
enable secret 5 $1$yNgO$9uU0Z6NG1ib4vlt05bmMW1
enable password todd
!
ip subnet-zero
!
spanning-tree extend system-id
!
!
interface FastEthernet0/1
no ip address
!
interface FastEthernet0/2
no ip address
--More--
Notice the enable mode password is not encrypted by default, but the enable secret is. This is the same password configuration technique that you will find on a router.
Lab 6.15: Setting the Hostname on a 2950 Switch
The hostnames on a switch, as well as on a router, is only locally significant. This means that it doesn’t have any function on the network or used for name resolution whatsoever. However, it is helpful to set a hostname on a switch so that you can identify the switch when connecting to it. A good rule of thumb is to name the switch after the location it is serving.
1. The 2950 switch command to set the hostname is exactly like any router: you use the hostname command. Remember, it is one word. From global configuration mode, type the command hostname hostname.
Switch>enable
Enter password: ****
Switch#config t
Enter configuration commands, one per line. End with CTRL/Z
Switch(config)#hostname Todd2950A
Todd2950A(config)#exit
Todd2950A#
Notice that as soon as I pressed enter, the hostname of the switch appeared. Remember that from global configuration mode, which you enter by using the config t command, it changes the running-config. Any changes you make in this mode take effect immediately.
Lab 6.16: Configuring IP Address Information on a 2950 Switch
You do not have to set any IP configuration on the switch to make it work. You can just plug in devices and they should start working, just like they would on a hub. The reason you would set the IP address information on the switch is so you can either manage the switch via Telnet or other management software, or you wanted to configure
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