I don't have ELS device so I cannot tell if this statement is valid, but check if it is a valid statement;
#set switch-options secure-access-port interface <trunk_port> no-dhcp-trusted
I don't have ELS device so I cannot tell if this statement is valid, but check if it is a valid statement;
#set switch-options secure-access-port interface <trunk_port> no-dhcp-trusted