The iscsi_initiator terminate_session command terminates the session.
sdcli iscsi_initiator terminate_session {-m MachineName} -s Session_ID
MachineName is the machine name on which you want to execute the command. If no machine name is specified, the command is executed on the local machine.
-s Session_ID is the session ID of the session you want to terminate.
sdcli iscsi_initiator terminate_session -s 0xffffffff868589cc-0x4000013700000006
The preceding example terminates the specified iSCSI session on the local machine.