Hello, everyone！
During the maintenance of WDM networks, Ethernet faults often occur. Today, let us discuss the analysis and handling of Ethernet deterioration.
Fault description
The Ethernet service deterioration indicates that the Ethernet service is abnormal. For example, the network access speed is low, the equipment delay is long, the packet loss occurs, or incorrect packets exist in the received or transmitted data
Fault analysis
The possible causes are as follows:
The service volume is large, the bandwidth is insufficient or sufficient, but the service burst volume is large.
The peer device does not respond when the traffic is heavy.
The port attributes do not match the attributes of the peer device. As a result, the port works abnormally.
The physical layer is faulty.
Handling method
Cause 1: The fault causes the RMON event of the corresponding NE. For the handling procedure of the RMON event, refer to the Alarms and Performance Events Reference of the relevant product.
Cause 2: The flow control function is enabled on the devices at both ends to suppress the service transmission volume on the network, reducing or suppressing packet loss.
Cause 3: Check the settings of the port attributes and modify the mismatched settings.
Cause 4: Check whether the ETH_8B10B_ERR alarm is reported. If yes, handle the alarm.
That's all，thank you!
