How Do I Rapidly Determine a Loop?

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Check whether MAC address flapping occurs to rapidly determine a loop on a network. Generally, a loop occurs if a MAC address flapping alarm is generated consecutively.
Enable MAC address flapping detection according to the following table.
Enable MAC Address Flapping Detection: Run the mac-address flapping detection in the system view.
Disable MAC Address Flapping Detection: Run the undo mac-address flapping detection in the system view.
Check whether MAC address flapping occurs according to the following table.
Run the display trapbuffer or display mac-address flapping record command to check information about MAC address flapping detection.

Other related questions:
How do I determine the signal strength
Run the display cellular command to view the Current RSSI field. If the Current RSSI field displays a value smaller than -85 dBm, the signal strength is weak and the data service rate is low and unstable. If the Current RSSI field displays a value smaller than -100 dBm, data cards may fail to register with or dial in to the network.

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