Due to the test requirement,I have to disable the LOM x722 on the CH242 V5 server.I read the reference on the support website of HUAWEI, and got nothing. https://support.huawei.com/enterprise/zh/knowledge/EKB1100005700
It says the LOM option can be modify in the PCH tab, but actually this server bios does not have these options for LOM.
And then I have disabled all of the PCIE root ports under the PCH configuration page, reboot the system but it was useless.
Refers to the spec of server
Finally I found an useful infomation which is the LOM x722 connect with CPU 1. Move to BIOS >>Advanced>>Socket Configuration>>IIO Configuration>>CPU1 Configuration>>SocketPCIeBrxxx Port 1C .For another v5 server ,the LOM may be SocketPCIeBrxxx Port 2C or 3C.