August 06, 2014

Disable telnet and enable ssh on Cisco Switch (IOS)

We recently purchased a Cisco switch for our Hadoop cluster. So I wanted to setup Cisco switch. But first of all I want to configure ssh and disable telnet. Lets see how we can do that.
Connect to the switch using telnet or using console port. (You should enable telnet and give a password from express setup.)
configure terminal
hostname <switchname>
ip domain-name <domain name>
crypto key generate rsa
Enter "1024" when it prompts for
How many bits int the modulus [512]:
Then run below commands
interface fa0/0
ip address
no shutdown
username <username> priv 15 secret <password>
aaa new-model
enable secret <password>
If you have a Cisco router use "0 4" instead of "0 14"
line vty 0 14
transport input ssh
copy running-config startup-config
Now you can use SSH client to connect to switch.