1. Setup Management IPFirst, make sure you have performed basic network configurations on your switch. For example, assign default gateway, assign management ip-address, etc. If this is already done, skip to the next step.
In the following example, the management ip address is set as 192.168.101.2 in the 101 VLAN. The default gateway points to the firewall, which is 192.168.101.1
# ip default-gateway 192.168.101.1 # interface vlan 101 (config-if)# ip address 192.168.101.2 255.255.255.0
2. Set hostname and domain-nameNext, make sure the switch has a hostname and domain-name set properly.
# config t (config)# hostname myswitch (config)# ip domain-name thegeekstuff.com
3. Generate the RSA KeysThe switch or router should have RSA keys that it will use during the SSH process. So, generate these using crypto command as shown below.
myswitch(config)# crypto key generate rsa The name for the keys will be: myswitch.thegeekstuff.com Choose the size of the key modulus in the range of 360 to 2048 for your General Purpose Keys. Choosing a key modulus greater than 512 may take a few minutes. How many bits in the modulus : 1024 % Generating 1024 bit RSA keys, keys will be non-exportable...[OK]Also, if you are running on an older Cisco IOS image, it is highly recommended that you upgrade to latest Cisco IOS.
4. Setup the Line VTY configurationsSetup the following line vty configuration parameters, where input transport is set to SSH. Set the login to local, and password to 7.
# line vty 0 4 (config-line)# transport input ssh (config-line)# login local (config-line)# password 7 (config-line)# exitIf you have not set the console line yet, set it to the following values.
# line console 0 (config-line)# logging synchronous (config-line)# login local
5. Create the username passwordIf you don’t have an username created already, do it as shown below.
myswitch# config t Enter configuration commands, one per line. End with CNTL/Z. myswitch(config)# username ramesh password mypasswordNote: If you don’t have the enable password setup properly, do it now.
myswitch# enable secret myenablepasswordMake sure the password-encryption service is turned-on, which will encrypt the password, and when you do “sh run”, you’ll seee only the encrypted password and not clear-text password.
myswitch# service password-encryption
5. Verify SSH accessFrom the switch, if you do ‘sh ip ssh’, it will confirm that the SSH is enabled on this cisco device.
myswitch# sh ip ssh SSH Enabled - version 1.99 Au