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

HSRP in ACI

Updated: April 17, 2026

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Describes the interface and connectivity requirements for deploying HSRP in a ACI fabric, including Layer 3 Out configuration and external Layer 2 connectivity.

HSRP in a Cisco ACI fabric is a first-hop redundancy protocol implementation that

operates only on routed interfaces or subinterfaces,
is configured under a Layer 3 Out,
requires external Layer 2 connectivity between leaf switches, and
exchanges hello messages directly between leaf switches without traversing spine switches.

HSRP deployment topology

The following figure shows a typical HSRP deployment topology in ACI fabric.

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