HSRP Interface Tracking for Uplink Failover

Bundle lab · $29.99

Implement HSRP with interface tracking so the virtual gateway fails over when the active router loses its upstream link. Two routers (R1, R2) share a user LAN via SW with a single virtual default gateway for the PC, and both uplink to a separate CORE switch. The learner adds HSRP group 1 with a virtual IP, priority/preempt on R1, and tracks R1's uplink to drive deterministic failover.

Learning objectives

• Configure HSRP group 1 with a shared virtual IP on two routers for a single LAN
• Make R1 the intended active via HSRP priority and preempt
• Track the upstream interface on R1 so an uplink failure reduces its HSRP priority and triggers failover
• Verify HSRP active/standby state and tracked decrement using show commands
• Validate endpoint default-gateway behavior using the virtual IP

Troubleshooting focus

• HSRP group or virtual IP mismatch preventing peering
• Virtual IP equals a real interface IP (invalid)
• Preempt missing on the intended primary prevents role reclamation
• Tracked interface reference wrong or down/up state misunderstood
• PC default gateway not set to the VIP, causing loss of external reachability