switchport mode SD is used for fibre-channel switchport monitor is used for ethernet https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/system_management/ 503_n1_1/cisco_n5k_system_mgmt_cg_rel_503_n1_1_chapter15.pdf https://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli_rel _4_1/Cisco_Nexus_5000_Series_Switch_CLI_Software_Configuration_Guide_chapter50.html