This chapter provides the configuration procedures and operational guidelines for implementing Hot Standby Router Protocol (HSRP) within the Cisco ACI fabric to ensure redundant default gateway services and high availability for Layer 3 external networks.
This chapter contains the following sections:
HSRP
Describes how HSRP provides first-hop routing redundancy for IP hosts by using active and standby routers that share a virtual IP address and MAC address.
HSRP in Cisco ACI
Describes the interface and connectivity requirements for deploying HSRP in a Cisco ACI fabric, including Layer 3 Out configuration and external Layer 2 connectivity.
HSRP versions
Compares HSRP versions 1 and 2, including supported group-number ranges, multicast addresses, and virtual MAC address ranges for IPv4 and IPv6.
HSRP guidelines and limitations
Describes guidelines and limitations for configuring HSRP in Cisco ACI, including state synchronization, dual-stack addressing, interface support, and traffic-forwarding behavior.
Default HSRP settings
Lists the default values of HSRP parameters for verifying group configuration and troubleshooting unexpected operational behavior in Cisco ACI fabrics.
Configure HSRP using the GUI
Configures HSRP interface and group profiles and their associated policies on leaf switches by using the Cisco APIC GUI for virtual IP redundancy.