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What is the maximum number of HSRP interfaces supported?

April 26, 2017hsrp interfaces maximum supported

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What is the maximum number of HSRP interfaces supported?

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A. Each of the 16 unique group numbers can be used by 16 consecutive Layer 3 interfaces, which gives a total maximum of 256 HSRP interfaces. The total number that is recommended is 64, but this number depends on the routing protocols and features that are configured on the box. If you configure too many HSRP interfaces, you could cause the CPU load on the switch to become too high, which can have unexpected side effects.