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Configuring MAC Address Flapping Detection to Quickly Detect Loops
When a loop occurs, MAC address flapping will occur at the failure point. You can use MAC address flapping detection to locate these loops.
When one of the following situations occurs, enable MAC address flapping detection to check whether a loop occurs:
- A MAC address entry alternatively appears and disappears.
- Ping operations alternatively succeed and fail.
- A high CPU usage alarm is generated.
Table 2-4 compares loop detection technologies.
Table 2-4 Comparison of loop detection technologies
Feature |
Advantages |
Disadvantages |
|---|---|---|
MAC address flapping detection |
|
The switch can only report alarms after detecting a loop but cannot eliminate the loop. |
Loop detection |
|
This function is not enabled by default and needs to be configured through commands. |
Loopback detection |
|
This function is not enabled by default and needs to be configured through commands. |