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Hi zhuqing kuang,
On recent version of OFED Enhanced IPoIB is turned on by default , Which prevents using CM .
Please try to to disable Enhanced IPoIB:
1) Disable "ipoib_enhanced":
Add the following entry:
options ib_ipoib ipoib_enhanced=0
2) Stop and start openibd service:
3) Verify parameter is disabled: (The value should be 0)
4) Verify the mode:
Thank you very much. The problem has been solved using your method.