At some site NGN bearer network NE40 enables Eth-Trunk bundling with four FE and there is alarm of frequent up/down in the interface.
There is alarm of frequent up/down in the interface.
Close the function and the interface is normal.
Command: port-self-protect disable
NE40 new version (v3.10 2351sp02sp09) Ethernet FHY chip does not receive packet check mechanism and the interface is up/down.
One interface of NE40 is up/down because the interface is bundled to ETH-trunk. The data in ETH-trunk is forwarded according to traffic. It is possible that the interface only sends the packet and does not receive it. The software checks it. If the interface only sends packet but does not receive it for long, there is self-loop in FHY chip and the check of sending packets to see whether FHY chip does not receive the packer or not. The process require physical self-loop and will results in up/down.