A good practise for manage a switch is to use certificate instead a password
STEP
1.Add a local user :
username admin privilege 15 secret kdfhsdfk_adfksbfjksbdpppp |
2.Associate a public key
username admin sshkey ssh-rsa AAAAAAAAAAAAAAAAAAAAAAAAetc admin@mydomain |
3. Associate a role to user
username admin role network-admin |
Well Done!