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How does TACACS/RADIUS accounting work with HA routers with HSRP?

April 26, 2017Accounting Ha hsrp radius routers

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How does TACACS/RADIUS accounting work with HA routers with HSRP?

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A. If routers are configured in HA mode (that run HSRP in-between them), then the active and standby routers act as one logical unit and share the same IP and MAC address. Only the active router generates the accounting record with a particular virtual IP address and updates the TACACS/RADIUS server. If the standby generates the accounting record with the same address, there is duplicate data in the backend RADIUS/TACACS server. Therefore, in order to avoid duplication of data, the standby router does not generate accounting records.