NE40E connected with J vendor Router through one optical port. The port status in NE40E is up although Rx cable in remote end was unplugged.
1)When optical port received light source from remote end, it status will change to up. It will not check whether the light can received at remote end to negotiate the port status.
2)To avoid this issue and eased troubleshooting time, it is recommended to configure “auto negotiation” under the optical port view to negotiate the status with the remote end. If the remote or local end port is not up, the status of both ports will not be up.
3)Both ends must configure the “auto negotiation” function in order to work properly.
It is recommended to configure “auto negotiation” for optical port to avoid the issue above and make sure both ends configure with auto negotiation to work properly.