eth-trunk member port due to physical factors appear up/down flapping , but the eth-trunk port is aways up, and the MSTP network topology occur flapping.
Fixed the eth-trunk port STP Cost
[HUAWEI] interface Eth-trunk 1
[HUAWEI- Eth-trunk 1] stp instance 2 cost 200
Note: Make sure unifiy calculations of stp pathcost-standard in the network before setting STP Cost and the path cost recommended values refer to the recommendation list in "stp pathcost-standard" command parsing of product manual.
eth-trunk member port flapping will cause STP Cost changes, which can lead to STP / MSTP topology recalculation, causing Network flapping.
In STP / MSTP network, to eliminate this impact, we'd better fixed the eth-trunk port STP Cost.