Why is the GE interface on the 8FE1GE interface card not seen in interface information after the interface card register successfully

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Run the display interface brief command to view the interface information:

<Huawei> display interface brief
InUti/OutUti: input utility/output utility
Interface                   PHY      Protocol    InUti    OutUti      inErrors     outErrors
Cellular0/0/0               down      down        0%        0%           0             0    
Cellular0/0/1               down      down        0%        0%           0             0    
Ethernet5/0/0         down      down        0%        0%           0             0    
Ethernet5/0/1         up          up        0%        0%           0             0    
Ethernet5/0/2         down      down        0%        0%           0             0    
Ethernet5/0/3         down      down        0%        0%           0             0    
Ethernet5/0/4         up          up      0.01%     0.01%          0             0    
Ethernet5/0/5         down      down        0%        0%           0             0    
Ethernet5/0/6         down      down        0%        0%           0             0    
Ethernet5/0/7         down      down        0%        0%           0             0    
GigabitEthernet0/0/0        down      down        0%        0%           0             0    
GigabitEthernet0/0/1        down      down        0%        0%           0             0    
GigabitEthernet0/0/2        down      down        0%        0%           0             0    
GigabitEthernet5/0/0  down      down        0%        0%           0             0    

You can see from the command output that the GE interface on the 8FE1GE interface card is displayed after the other GE interfaces on the router, not following the eight FE interfaces on the interface card.

Other related questions:
How to check the reset causes of an interface card
Run the display reset-reason command to check the reset cause of the interface card installed in a slot, determining whether the interface card reset proactively or passively. If the following message is displayed: Reason: A link fault fails to be rectified (which indicates a link fault), the interface card reset proactively. Otherwise, the interface card reset passively.

Do SA series cards support GE interfaces
Among SA series cards, ports on the LE0MG24SA, LE0MG24CA, ES0D0G24SA00, and ES0D0G24CA00 can work at 1000 Mbit/s, and ports on other SA cards only transmit and receive services at 10 Gbit/s and cannot work at 1000 Mbit/s. You can use Hardware Query Tool to query the port rate of specified cards.

Does the AR need to be configured with the Layer 2 interface card to support the AC function
To directly connect an AP to an AR, use the LAN interface of the AR. For details about LAN interfaces on the AR, see Huawei AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 Product Documentation>Get to Know the Product >Hardware Description. LAN interfaces are described in Appearance of the corresponding product. You can install a LAN interface card on the device to provide more LAN interfaces. For details about the LAN interface card or other interface cards supported by the device, see Ethernet LAN Interface Card in Huawei AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 Product Documentation>Get to Know the Product >Hardware Description. For details about the LAN cards supported by AR routers, see Huawei AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 Product Documentation Get to Know the Product > Hardware Description > Cards > Ethernet LAN Interface Card.

Specification of metro3000 interface card and process card
Process card slot IU1-4 and IU9-12 match with interface card slot IU1-4 and IU9-12

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