[NE40] A Device Cannot Go Up Because the 10GE WAN Board Does Not Match the Multi

Problem that a device cannot go Up because the 10GE WAN board does not match the multi-mode optical module

Fault Analysis
1. Run the display interface gigabitethernet 1/0/1 command to check the interface status. The command output shows that both the input optical power (Rx Power) and output optical power (Tx Power) of the interface are in the normal range. 
2. Replace the current multi-mode optical module and optical fiber with another multi-mode optical module and optical fiber. The interface still cannot go Up.
3. Replace the current multi-mode optical module and optical fiber with a single-mode optical module and optical fiber and the interface goes Up. Then, replace the single-mode optical module and optical fiber with the multi-mode optical module and optical fiber, the fault occurs again. Because another two devices using 10GE WAN boards installed with multi-mode optical modules can communicate on the current network, the possibility that 10GE WAN boards do not support multi-mode optical modules is excluded. It is confirmed that the multi-mode optical modules used on the current network may be from different manufacturers. Only optical modules from specific manufacturers are applicable to both 10GE WAN boards and 10GE LAN boards, while optical modules from other manufacturers are applicable to only 10GE LAN boards. For security purposes, use multi-mode optical modules on 10GE LAN boards rather than WAN
boards or POS boards. 

Procedure
Step 1 Replace 10GE WAN boards on the two devices with 10GE LAN boards.
End