Cisco APIC Layer 3 Networking Configuration Guide, Release 6.2(x)

HSRP versions

Updated: April 17, 2026

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Compares HSRP versions 1 and 2, including supported group-number ranges, multicast addresses, and virtual MAC address ranges for IPv4 and IPv6.

HSRP versions 1 and 2 are gateway redundancy protocol implementations that differ in

the supported group-number ranges.
the multicast addresses for hello packets.
the virtual MAC address ranges for IPv4 and IPv6.

HSRP version 2 enhancements

HSRP version 2 provides the following enhancements over HSRP version 1:

Supports group numbers from 0 to 4095. HSRP version 1 supports group numbers from 0 to 255.
Uses multicast address 224.0.0.102 for IPv4 hello packets and FF02::66 for IPv6 hello packets. HSRP version 1 uses multicast address 224.0.0.2 for IPv4 hello packets.
Uses the virtual MAC address range 0000.0C9F.F000 through 0000.0C9F.FFFF for IPv4 and 0005.73A0.0000 through 0005.73A0.0FFF for IPv6.

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