| Table of Contents | ||
|---|---|---|
|
Configuration Notes and Constraints
When configuring loopback detection, consider the following points:
The loopback detection message is sent in the native VLAN. When a loopback detection message is received, the device considers the source MAC address to determine if the message was sent from this device, without considering the VLAN tag.
Loopback detection can be enabled on a physical interface or a Link Aggregation Group (LAG) interface but cannot be enabled on the member interfaces of a LAG.
To enable the loopback detection function, users need to enable loopback detection BOTH globally and at the per-interface level.
Loopback detection is not supported in Multi-Chassis Link Aggregation (MLAG) scenarios.
Configuring Loopback Detection
Step 1 Enable loopback detection function globally.
...
run show loopback-detection
Example for Configuring Loopback Detection
Networking Requirements
Figure 1. Loopback Detection Configuration Example
...
As shown in Figure 1, if there is a loop in the network connected to interface ge-1/1/1 of the device Switch, it will cause a broadcast storm, and communication on the Switch and the entire network may be affected.
...