Cabletron Systems FN100 User Manual

Also see for FAST NETWORK 100: Quick setup guide Reference guide

Contents

Chapter 5: FN100 Diagnostics and TroubleshootingPage 5-2Fast Network 100 User Guide5. After several more seconds, the Ready LED will stay on, indicatingthat the power-up diagnostics sequence is complete.In addition, the Port Link LEDs will turn on for those ports with goodlinks and the Segment Status LEDs will turn on (or flash) when theselected status condition is present.5.1.2 Specific Power-Up TestsThe power-up diagnostic tests performed on the FN100 include:• ROM checksum test• Instruction/Data memory test• Address database memory test• Ethernet controller test• Packet memory test• Shared RAM test• Ethernet data loopback test5.1.3 Software Checksum ComparisonWhen the FN100 reboots, its operational software is verified by achecksum comparison before it is loaded. If the software fails thechecksum test due to an interrupted new software distribution procedure,the FN100 automatically uses its backup version of software. A backupversion of software is always stored in non-volatile memory.The operational parameters of the FN100 software are also protected by achecksum comparison. When the FN100 reboots, if the operationalparameters of the FN100 fail a checksum test due to a power failure in themidst of a previous update, the FN100 automatically uses its backupversion of the parameters.NOTEIf the Ready LED does not stay on, contact Cabletron SystemsTechnical Support.