1. Login NX220 by management IP, run command switchshow
to check the state of FC switch, found switch was online and other ports were normal except those ports connect to blade server. So switch wouldn't has hardware issue.
2. Login Blade BMC to check whether Mezz card installed in blade. Under navigation System Information--> Firmware Version
, we found Mezz card installed on card1, and the type of Mezz is MU220. Mu220 match NX220, so the Mezz card type was correct. Card1 connect to plane B, so NX220 switch module should be inserted in slot B1 or B2. But actually, in this scene, NX220 was installed in slot C, it didn't match Mezz card in card1.