This document provides instructions for configuring SSH on a switch. It shows the commands used to generate an RSA key pair with a 768-bit modulus for SSH, set the SSH timeout to 60 seconds and authentication retry limit to 3, create a local user with username "admin" and password "123", and configure the VTY lines to use SSH for login authentication.

1. SSH Configuration on switch
WWW.TCPIPGURU.CO
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3. Configuring SSH on switch:
R1>enable
R1#config t
Router(config)#hos
Router(config)#hostname R1
R1(config)#ip do
R1(config)#ip domain-n
R1(config)#ip domain-n
R1(config)#crypto key
R1(config)#crypto key gen
R1(config)#crypto key generate rs
R1(config)#crypto key generate rsa gen
R1(config)#crypto key generate rsa general-keys mo
R1(config)#crypto key generate rsa general-keys modulus 768
% The key modulus size is 768 bits
% Generating 768 bit RSA keys, keys will be non-exportable...[OK]
*Mar 1 08:45:37.633: %SSH-5-ENABLED: SSH 1.99 has been enabled

4. R1(config)#ip ssh time-out 60
R1(config)#ip ssh authentication-retries 3
R1(config)#username admin password 123
R1(config)#line vty 0 6
R1(config-line)#login local
R1(config-line)#transport input ssh