USG9100 and bottom switch equipment use Eth-Trunk interface butt, appears network one-way audio, leading to business interruption.
USG9100 Eth-Trunk interface status is down, bottom switch equipment Eth-Trunk interface status is up, leading to business flow interruption.
In USG9100 equipment command line, enter the designated Eth-Trunk interface view, use the least command modify members interface’s downstream threshold value.
[USG9100]interface eth-trunk 0
[USG9100B-Eth-Trunk0]least active-linknumber 2
Through the configuration analysis, problem is Eth-Trunk members interface’s lower limit threshold configuration is not consistent.
Because in the debugging stage, Eth-Trunk interface’s four network cables only connected three (the rest one connected PC directly)
USG9100 Eth-Trunk members interface lower limit threshold is 4, the Eth-Trunk will be up when the four physical interfaces are up
Bottom exchange Eth-Trunk members interface lower limit threshold is 2, the Eth-Trunk will be up when the two physical interfaces are up
At this time only connected three network cable, leading to USG9100 interface status is down, appears one-way audio state.
When the Eth-Trunk interface appears one-way audio state, can check whether the member interface’s downstream threshold value is consistent, especially need have attention in peer vendor’s equipment.