Qunar Tech Salon

Jun 22, 2021 · Operations

Troubleshooting BFD Neighbor Failure on Cisco Nexus Switches with VPC Peer‑Gateway

This article details a Cisco Nexus network scenario where two switches use VPC and BFD for link fault detection, explains why BFD neighbor establishment fails due to VPC peer‑gateway causing TTL reduction and MAC rewriting, and presents test results and configuration recommendations to resolve the issue.