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Can Cisco IOS NAT be used with Hot Standby Router Protocol (HSRP) to provide redundant links to an ISP?

April 26, 2017Cisco hot hsrp IOS NAT Protocol Router standby Used

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Can Cisco IOS NAT be used with Hot Standby Router Protocol (HSRP) to provide redundant links to an ISP?

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A. Yes. NAT does provide HSRP redundant. However, it is different from SNAT (Stateful NAT). NAT with HSRP is a stateless system. The current session is not maintained when failure takes place. During static NAT configuration (when a packet does not match any STATIC rule configuration), the packet is sent through without any translation. Refer to NAT – Static Mapping Support with HSRP for High Availability for more information about this feature.