Cabletron Systems 2H253-25R manual User parameters Position of Mode switch IP address

Page 47

Troubleshooting Checklist

Table 4-2 Troubleshooting Checklist (Cont’d)

Problem

Possible Cause

Recommended Action

 

 

 

User parameters

1. Position of Mode switch (7),

(IP address,

NVRAM Reset, was changed

Device and

sometime before either cycling

Module name,

power or pressing the RESET

etc.) were lost

button, causing the

when the

user-entered parameters to

2H253-25R

reset to factory default

power was cycled

settings.

or the front panel

2. Clear NVRAM was set

RESET button

through Local Management.

was pressed.

 

1.Reenter the lost parameters as necessary. Refer to the SmartSwitch Series 2E253, 2H252, 2H253, and 2H258 Local Management User’s Guide for the instructions to configure the device through Local Management.

2.If the problem continues, contact Cabletron Systems for assistance.

Troubleshooting 4-7

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Contents 2H253-25R SmartSwitch Installation User’s Guide Page Page FCC Notice Cabletron SYSTEMS, INC Program License Agreement Page Page Page Cabletron Systems Limited Program License Agreement Viii Declaration of Conformity Page Contents Troubleshooting Figures Tables Structure of this Guide Using this GuideAbout This Guide Xvi Related DocumentsDocument Conventions Document ConventionsPage Overview IntroductionAuto-Negotiation ConnectivitySmartTrunk Full Duplex Switched EthernetRuntime IP Address Discovery Port/VLAN Redirect Functions Remote Monitoring RmonBroadcast Suppression Flow Control Rate LimitingManagement Garp Switch OperationSwitching Options 12 802.1 Port PriorityYear 2000 Compliant Lanview Diagnostic LEDsOptional HSIMs and VHSIMs Standards CompatibilityGetting Help 10BASE-T Network Network Requirements100BASE-TX Network Unpacking the Device InstallationInstalling the Device Installing OptionsGuidelines for Tabletop and Shelf Installations Tabletop or Shelf InstallationGuidelines for the Rackmount Installation Rackmount InstallationAttaching the Strain-Relief Bracket Rack Mounting the 2H253-25R Redundant Primary AC outlets are On separate circuits Connecting PowerConnecting to the Network Straight Cable Connection Completing the Installation Using Lanview TroubleshootingPWR CPU FDX OFF Troubleshooting ChecklistSeries 2E253, 2H252, 2H253, User parameters Position of Mode switch IP address Reset Button Using the Reset ButtonPhysical Properties Device SpecificationsSpecifications INPUT/OUTPUT Ports Electrical SpecificationsEnvironmental Requirements Regulatory Compliance COM Port Pinout AssignmentsPage Required Tools Optional Installations Mode Switch Bank SettingsRemoving the Chassis Cover Removing the Chassis Cover Figure B-1 Removing the Chassis Cover Switch 6 Forced BootP Setting the Mode SwitchesSimm Upgrade Locating SIMMs Installing the Dram SimmFigure B-4 Installing the Dram Figure B-5 Hsim and Vhsim Connector Locations Installing Optional Hsim or Vhsim Interface ModulesPage Numerics IndexIndex-2
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