148 Chapter 4 Getting Started with Device Manager320985-A Rev 01• “Installing JDM on Windows” on page 149• “Installing JDM on UNIX or Linux” on page 159• “Starting Device Manager” on page 171JDM installation precautionsThe following warnings apply to Device Manager on all operating environments:• The JDM and Ethernet Switch software versions must match for the correctdialog boxes and information to be shown and accessible. Please refer to theRelease Notes for a complete compatibility list.• If you want to use JDM to support multiple Nortel switches in your network,ensure that the JDM version you use supports each version of softwarerunning on each Nortel device in your network.• Prior to upgrading JDM, either uninstall your previous version of the DeviceManager software, or install the new software to a different directory. (Youcan have multiple versions of Device Manager stored on your Windows,UNIX, or Linux machine, provided that each version is stored in a separatedirectory.)• JDM saves the IP addresses that are visited to a settings file. A JDM uninstalloperation does not remove this settings file.— In a Windows environment, the settings file is dm.ini, and is created in theJDM install directory.— In a UNIX environment, the settings file is ~/.jdm/dm.ini.— In a Linux environment, the settings file is ~/.jdm/dm.ini.• The dm.ini file containing IP addresses visited from a previous JDM versionis automatically used by a new JDM version installed in the same directory.You must manually move or copy the dm.ini file from a previous version ofJDM to a new JDM installation in a different directory.Note: Do not install the JDM to a directory where a previous version ofDevice Manager software already exists.