Before one BRAS Jupiter connected to GE port of EGT2 board of OSN3500 (working mode: auto-negotiation). Service is OK.
When they disconnected the patch cord and then connected it back, the service is not OK (Link was DOWN).
They have to set the mode of GE of EGT2 to 1000 Full-Duplex. Service restored.
Make the test environment on the idle GE port.
Set 2 GE ports work on auto-negotiation mode. Link is UP
Set the GE port of Jupiter to 1000Full-Duplex (GE port of Huawei is still auto-negotiation). The service is still UP.
But when Disconnect the optical cable between them and connect back, Link is DOWN (service interrupt). Set the GE port of OSN to 1000Full-Duplex. Link is UP (service restore).
So, In the customer's case, maybe, someone have set the working mode of GE port on Jupiter to 1000Full-Duplex (GE port of OSN is still Auto-negotiation), service is OK until disconnect the optical cable between them.
When we connect back, service is still interrupt until we set GE port of OSN to 1000Full-Duplex too.
- Check the optical power. It's OK.
- Check the working mode of 2 equipments. Now the working mode of 2 equipments are 1000Full-Duplex.