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%IP-4-DUPADDR: Duplicate address issue at NAT-HSRP HA Redundancy ISR4k routers
At NAT-HSRP HA Redundancy setup, issue happened after multiple OIRs of NAT inside/outside ports that lead to down/up, no matter NAT-HSRP HA Redundancy enabled at "ip nat inside" or "ip nat outside" rules. Also, when issue observed, there's such configurations at ISR4k routers: - Route-map attached on HSRP Redundancy static NAT rules - And, same NAT translation addresses configured on multiple different HSRP Redundancy static NAT rules - And, the configured NAT translation addresses share the same segment with router's NAT enabled interfaces
shut/remove cable of I/F of ISR4k side, or reload the router. About the conditions that issue didn't occur, please see "Further Problem Description".
With any of the condition below, we didn't observe same issue. - No route-map attached on HSRP Redundancy static NAT rules - Not configuring same NAT translation addresses on multiple different HSRP Redundancy static NAT rules - The configured NAT translation addresses is different from the segment at router's NAT enabled interfaces
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