To get aaa running you need to perform the following steps:
First create a local user database
switch(config)# username myusername secret myunencryptedpassword
switch(config)# aaa new-model
switch(config)# aaa authentication login default local
Could be good to also do:
switch(config)# line vty 0 15
switch(config-line)# login authentication default
Use CTRL+Z to skip out of config fast, then try to login in a new window before
closing the authenticated one, in case you screwed up the configuration.
You can get locked out!
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[...] to configure this on your cisco equipment, please follow the steps in this article first. Then to make sure the Cisco IOS Switch or Router will notify your tacacs deamon of [...]