Symptom
TACACS authentication will fail with older deprecated config CLI of "tacacs-server host " on 16.12.2 or later
IOS-XE version. The tacacs-server cli is deprecated from 16.12.2 and later. This fix auto-converts the tacacs-server cli to tacacs server. This fix takes care of upgrades or scenarios where the old cli has been used. To unconfigure, new cli ( tacacs server ) should be used.
Conditions
"tacacs-server host " CLI is used to configure the TACACS feature.
Workaround
Migrate TACACS configuration to use new format of "tacacs server "
Further Problem Description
With the IOS-XE versions where the fix of this defect is available, the deprecated config CLI - "tacacs-server host " will get auto-upgraded to the newer format while configuring it or during the IOS-XE upgrade.
