Connection between USG3030 and S65 GE optical port failed.
1. Make conform that optical module and fiber are working normally.
2. Test USG3000 optical port luminous power
3. Configure flow-control negotiation on USG3000 optical port.
4. S65 interface is static full-duplex/GE, but according to the configuration information from reseller, ports of USG3000 are automatic negotiation. So keep two ports parameters consistent and both automatic negotiation or static full-duplex/GE.
As USG3000 consist 4 pairs of opto-electronic mutually exclusive GE port, port parameters is changed when the electrical port works. Then the electrical cable is unplugged and the optical-fibers are plugged, making parameters configured for electrical port invalid. Recongifure the parameters after optical port is connected, the ports can negotiate successfully and both up. The problem is resolved.