TACACS+ enables every change to a network-device configuration to be subject to special authorization. TACACS+ accounting enables each of these steps to be logged. TACACS+ is a requirement for systems used in electronic payment (PCI compliance).
Strict monitoring of this type leads to an increase in traffic to and from the TACACS+ server(s). In large-scale scenarios, the TACACS+ communications caused when using scripts for centralized configuration changes or if CRON commands are run regularly could lead to an overload of the TACACS+ server.
