Experiment One: Configure Telnet login for router/switch

Configure Telnet login for the switch

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1, "Experimental purpose"

Learn how to enable telent on the switch, enabling remote access to the switch via Telnet.

2. "Background description"

When the Enterprise campus network coverage is large, the switch will be placed in different locations, if the switch is configured each time

Need to be configured onsite at the location of the switch, the workload of the Administrator will be large. This can be done on the switch

Telnet configuration, so that when you need to configure the switch, the administrator can log on remotely with Telnet configuration.

3. "Demand Analysis"

Need to know how to configure the password of the switch, and how to configure Telnet, to master telnet remote access

The method of asking the switch.

4, "Experimental equipment"

Two-layer switch 1 units; three-layer Switch 1 units

5, "Experimental principle"

Configure the IP address of VLAN 1 on both switches, and connect the F0/1 ports of the two switches with twisted-pair wires.

Configure Telnet Separately, and then you can log on to the other switch in telnet mode on each switch.

6, "Experimental Steps"

First step: Configure host name, manage IP address on both switches

S3760 (config) #hostname RRR

！ Configuring the host name of a layer 3 switch

RRR (config) #interface vlan 1

！ Configuring the Management IP address for Layer 3 switches

RRR (config-if) #ip address 192.168.1.1 255.255.255.0

RRR (config-if) #no shutdown

RRR (config-if) #end

s2126g (config) #hostname RR

！ Configuring the host name of a layer 2 switch

RR (config) #interface vlan 1

！ Configuring the Management IP address for Layer 2 switches

RR (config-if) #ip address 192.168.1.2 255.255.255.0

RR (config-if) #no shutdown

RR (config-if) #end

Step Two: Configure Telnet on the three-layer switch

RRR (config) #enable password 0 star

！ Configure the Enable password

RRR (config) #line vty 0 4

！ Enter thread configuration mode

RRR (Config-line) #password 0 Star

！ Configure the password for Telnet

RRR (Config-line) #login

！ User name password authentication with Telnet enabled

RRR (Config-line) #exit

Step Three: Configure Telnet on a Layer two switch

RR (config) #enable secret level 1 0 star

！ Configure the password for Telnet, which is the level 1 password

RR (config) #enable secret 0 star

！ Configure the Enable password, which is the level 15 password by default

Fourth Step: Telnet remotely

You can log on to Layer 2 switch L2-SW on the 3-tier switch RRR to verify that:

Rrr#telnet 192.168.1.2

Trying 192.168.1.2, 23 ...

User Access Verification

Password:

！ Prompt for Telnet password, enter the password for the setting star

Rr>enable

Password:

！ Prompt for the Enable password, enter the password for the setting star

rr#

！ The two-layer switch RR is now available for normal configuration

rr#

Rr#exit

！ Use the exit command to exit Telnet login

rrr#

You can log on to Layer 3 switch RRR on Layer 2 switch L2-SW to verify that:

Rr#telnet 192.168.1.1

Trying 192.168.1.1 ... Open

User Access Verification

Password:

！ Prompt for Telnet password, enter the password for the setting star

rrr>en

Password:

！ Prompt for the Enable password, enter the password for the setting star

rrr#

Rrr#exit

[Connection to 192.168.1.1 closed by foreign host]

！ Use the exit command to exit Telnet login

rr#

"Note items"

If you do not configure the Enable password, you will not be able to log on to the switch for configuration and can enter user mode, but

Unable to enter privileged mode, the second-level switch is now prompted with "% No password Set", three-layer switching

Machine at this time the prompt message is "Password required, but none set".

7, "Specific implementation code"

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This article is from "Sorry, your WiFi has been disconnected ~" blog, declined reprint!

Experiment One: Configure Telnet login for router/switch