Most virtualization engineers are familiar with failover based on link status, but VMware Beacon Probing takes a different approach to detecting network failures.
Instead of simply checking whether a NIC is physically connected, ESXi sends Layer 2 beacon frames between uplinks to identify failures where the link remains up, but traffic can no longer flow correctly.
Examples include:
⚠️ STP issues
⚠️ VLAN misconfigurations
⚠️ Upstream network failures
⚠️ Switch forwarding problems
In this infographic, I've broken down how Beacon Probing works, what a beacon frame contains, how ESXi detects failures, and why VMware recommends using this feature carefully in modern network designs.
Understanding the difference between "Link Status" and "Path Health" can help avoid troubleshooting headaches and unexpected failovers.
Do you use Beacon Probing in your ESXi environments, or do you prefer Link Status Only for failover detection?
Jafar Tavana
Posted on
🔍 VMware Beacon Probing: A Powerful Yet Often Misunderstood Feature
For further actions, you may consider blocking this person and/or reporting abuse
Top comments (0)