iiPowering on the Router········································································································································· 36Startup Process······················································································································································· 37Configuration Fundamentals ········································································································································· 38Basic Configuration Procedures··························································································································· 38Command Line Interface······································································································································· 38Arranging Slots and Numbering Interfaces········································································································ 39Software Maintenance···············································································································································41Introduction ····································································································································································· 41Files ········································································································································································· 41Software Maintenance Methods·························································································································· 43Maintaining Application Program and Configuration Through Command Lines···················································· 44Maintaining the Router Through TFTP Server ····································································································· 44Maintaining the Router Through FTP Server ······································································································· 47BootWare Menu····························································································································································· 50Main BootWare Menu·········································································································································· 50BootWare Submenus ············································································································································ 52Upgrading an Application Program Through an Ethernet Interface········································································· 55Configuring Ethernet Interface Parameters ········································································································· 55Upgrading Procedure ··········································································································································· 56Upgrading BootWare Through Ethernet Interface······································································································ 58Upgrading BootWare Through Serial Interface·········································································································· 58XModem Protocol Overview ································································································································ 58Modifying Serial Interface Parameters················································································································ 59Upgrading BootWare ··········································································································································· 60Upgrading an Application Program through a Serial Interface················································································ 62Maintaining Application and Configuration Files ······································································································ 62Dealing with Password Loss ·········································································································································· 64User Password Loss ··············································································································································· 64BootWare Password Loss ····································································································································· 65Super Password Loss ············································································································································· 65Backing Up and Restoring BootWare·························································································································· 66Hardware Maintenance ············································································································································67Preparing Tools ······························································································································································ 67Internal Structure····························································································································································· 67Removing/Installing PSUs ············································································································································· 68Removing a PSU ···················································································································································· 68Installing a PSU······················································································································································ 69Removing/Installing the Fan Module ··························································································································· 69Removing the Fan Module···································································································································· 69Installing the Fan Module ····································································································································· 70Removing/Installing the MPUF ····································································································································· 70Removing the MPUF ·············································································································································· 70Installing the MPUF················································································································································ 71Removing/Installing MSCA··········································································································································· 71Removing MSCA ··················································································································································· 71Installing MSCA····················································································································································· 71Installing/Removing CF Card ······································································································································· 72CF Card Structure·················································································································································· 72Installing CF Card ················································································································································· 72Removing CF Card················································································································································ 72Replacing Memory Bar·················································································································································· 73Memory Bar Structure ··········································································································································· 74Memory Bar Slot···················································································································································· 74