Fault Symptom
When two NE80E/40Es are connected through 10GE interfaces, the interfaces cannot be Up.
Fault Analysis
1. Run the display interface GigabitEthernet 1/0/0 command in the system view to view interface information.
GigabitEthernet1/0/0 current state : DOWN
Line protocol current state : DOWN
Description:TO[HUAWEI-A1]-10G-14/0/0
Route Port,The Maximum Transmit Unit is 1500
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 0018-82b1-7c2d
The Transceiver Vendor Name is FINISAR CORP.
The Transceiver Vendor PN is FTLX1412M3BCL
BW: 10G, Transceiver Mode: SingleMode
WaveLength: 1310nm, Transmission Distance: 10km
Rx Power: -12.29dBm, normal range: [-23.97, 0.75]dBm
Tx Power: -5.43dBm, normal range: [-13.49, 1.00]dBm
The receiving optical power and transmitting optical power displayed through the Rx Power and Tx Power items respectively are both in the normal range, which indicates that the fault is not caused by optical power.
2. Replace the optical fiber. The fault persists, which indicates that the fault is not caused by the optical fiber.
3. Replace the optical module. The fault persists, which indicates that the fault is not caused by the optical module.
4. Check the boards on the two interconnected devices. It is found that the 10GE interface on the local device is in the LAN transmission mode whereas the 10GE interface on the remote device is in the WAN transmission mode. Therefore, it can be inferred that the 10GE interfaces cannot be Up because their transmission modes do not match.
Procedure
1. Run the system-view command to enter the system view.
2. Run the interface interface-type interface-number command to enter the interface view.
3. Run the set transfer-mode wan command to set the transmission mode of the interface to WAN so that the transmission modes of the two interfaces can match.
Summary
When two interfaces are connected through 10GE interfaces whereas the 10GE interfaces cannot be Up, you can check the following items to rectify the fault:
1. Optical power
2. Optical fiber
3. Optical module
4. Transmission modes of the two interconnected interfaces
10GE interfaces can work in either WAN or LAN transmission mode. In different modes, physical frames are encapsulated in different manners. Therefore, a 10GE interface working in WAN transmission mode cannot communicate with a 10GE interface working in LAN transmission mode. In this case, when the two devices are connected through 10GE interfaces, ensure that their transmission modes are the same.
