A site USG5300 firewall the main board optical port connects with SGSN, the interface can not be up.
1. First, doubt whether it is optical fiber, optical module issue. Confirm with the scene that the optical fiber, optical module inserted in the other device there is no problem, exclude fiber / optical module issue;
2. Confirm the duplex mode of the both ends, the rate configuration is the same;
3.Using the interface card two optical ports to make docking ,can be UP;
4.Using the interface card and the main board optical port to make docking. The main board optical port is Down, the interface card interface is UP;
5. View the interface information, some of the information can not be read, and doubt whether the optical module compatibility issue. Problem can be solved by changing optical module .
flow control is disable
Optical Transceiver Module is set
Mode: Unknown or unspecified
Rate: 100Mb / s
After confirmation, the optical module applies to155M optical module, doesn’t match toUSG5300.Therefore it can not be used on the USG5300 is normal.
If meeting the problem that optical port can not be up, need to confirm whether the optical module can meet the device.