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Cabletron Systems 2H253-25R manual NVRAM Reset, was changed, sometime before either cycling

Models: 2H253-25R

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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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Cabletron Systems 2H253-25R manual NVRAM Reset, was changed, sometime before either cycling

Contents

2H253-25R 2H253-25R SmartSwitch Installation User’s GuideFAST ETHERNET WORKGROUP SWITCH RESETPage Only qualiﬁed personnel should perform installation procedures VCCI NOTICE FCC NOTICEINDUSTRY CANADA NOTICE CABLETRON SYSTEMS, INC PROGRAM LICENSE AGREEMENT Page CABLETRON SYSTEMS SALES AND SERVICE, INC PROGRAM LICENSE AGREEMENT 7. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR IN THE DURATION OR LIMITATION OF IMPLIED WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY NOT APPLY TO YOU CABLETRON SYSTEMS LIMITED PROGRAM LICENSE AGREEMENT viii If the Program is exported from the United States pursuant to the License Exception TSR under the U.S. Export Administration Regulations, in addition to the restriction on transfer set forth in Sections 1 or 2 of this Agreement, You agree not to i reexport or release the Program, the source code for the Program or technology to a national of a country in Country Groups D1 or E2 Albania, Armenia, Azerbaijan, Belarus, Bulgaria, Cambodia, Cuba, Estonia, Georgia, Iraq, Kazakhstan, Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China, Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, Uzbekistan, Vietnam, or such other countries as may be designated by the United States Government, ii export to Country Groups D1 or E2 as deﬁned herein the direct product of the Program or the technology, if such foreign produced direct product is subject to national security controls as identiﬁed on the U.S. Commerce Control List, or iii if the direct product of the technology is a complete plant o r any major component of a plant, export to Country Groups D1 or E2 the direct product of the plant or a major component thereof, if such foreign produced direct product is subject to national security controls as identiﬁed on the U.S. Commerce Control List or is subject to State Department controls under the U.S. Munitions ListDECLARATION OF CONFORMITY Page ABOUT THIS GUIDE ContentsINTRODUCTION NETWORK REQUIREMENTSOPTIONAL INSTALLATIONS AND MODE SWITCH BANK SETTINGS INSTALLATIONTROUBLESHOOTING SPECIFICATIONSxiii FiguresCOM Port Pin Assignments TablesTroubleshooting Checklist LANVIEW LEDsImportant Notice USING THIS GUIDEAbout This Guide STRUCTURE OF THIS GUIDEWAN Series Local Management User’s Guide HSIM-W6 Installation Guide HSIM-W84 Installation GuideRELATED DOCUMENTS Ethernet Technology Guide Cabling Guide SmartTrunk User’s GuideThe guide uses the following conventions DOCUMENT CONVENTIONSPage Important Notice Introduction1.1 OVERVIEW 1.1.2 Auto-Negotiation 1.1.1 ConnectivityThe 2H253-25R will reboot after RAD is successful 1.1.4 Full Duplex Switched Ethernet1.1.3 Runtime IP Address Discovery 1.1.5 SmartTrunk1.1.8 Port/VLAN Redirect Functions 1.1.6 Remote Monitoring RMON1.1.7 Broadcast Suppression 1.1.10 Flow Control 1.1.9 Rate Limiting1.1.13 Management 1.1.11 GARP Switch Operation1.1.14 Switching Options 1.1.12 802.1 Port Priority1.1.17 Year 2000 Compliant 1.1.18 LANVIEW Diagnostic LEDs1.1.15 Optional HSIMs and VHSIMs 1.1.16 Standards Compatibilityyour email address 1.2 GETTING HELPanonymous 2.2 10BASE-T NETWORK Network Requirements2.1 SmartTrunk 2-2 Network Requirements 2.3 100BASE-TX NETWORK100BASE-TX Network 3.1 UNPACKING THE DEVICE InstallationTable 3-1 Contents of 2H253-25R Carton 3.2 INSTALLING OPTIONS3.3 INSTALLING THE DEVICE Installation 3.3.1 Tabletop or Shelf InstallationGuidelines for Tabletop and Shelf Installations A = 15 cm 6 in B = 57 cm 22.5 in C = 53 cm 21 in D = 213 cm 7 ft 3.3.2 Rackmount InstallationGuidelines for the Rackmount Installation Rack mounting the 2H253-25R involves the following Attaching the Strain-Relief BracketInstallation Rack Mounting the 2H253-25R To connect the 2H253-25R to the power sources, proceed as follows 3.3.3 Connecting Power3.4 CONNECTING TO THE NETWORK Transmit TX Figure 3-6 Straight Cable Connection3.5 COMPLETING THE INSTALLATION 4.1 USING LANVIEW TroubleshootingDevice electronics not Table 4-1 LANVIEW LEDs Cont’d Should ﬂash green every two 2E253, 2H252, 2H253, and 2H258 4.2 TROUBLESHOOTING CHECKLISTRefer to the SmartSwitch Series 1. Refer to the SmartSwitch Series2E253, 2H252, 2H253, and 2H258 Series 2E253, 2H252, 2H253, and2H258 Local Management User’s Refer to the SmartSwitch Seriessometime before either cycling NVRAM Reset, was changedFigure 4-2 RESET Button 4.3 USING THE RESET BUTTONA.2 PHYSICAL PROPERTIES A.1 DEVICE SPECIFICATIONSSpeciﬁcations 200-240 Vac A.3 ELECTRICAL SPECIFICATIONSA.4 ENVIRONMENTAL REQUIREMENTS A.5 INPUT/OUTPUT PORTSFCC Part 15, CSA C108.8, 89/336/EEC, EN A.6 COM PORT PINOUT ASSIGNMENTSA.7 REGULATORY COMPLIANCE Page B.1 REQUIRED TOOLS Optional Installations and Mode Switch Bank SettingsRemoving the Chassis Cover B.2 REMOVING THE CHASSIS COVERThis section describes how to remove the 2H253-25R chassis cover B-2 Optional Installations and Mode Switch Bank SettingsTo remove the chassis cover, proceed as follows Figure B-1 Removing the Chassis Cover B-4 Optional Installations and Mode Switch Bank SettingsRemoving the Chassis Cover Screws Chassis Cover Front Panel ChassisB.3 SETTING THE MODE SWITCHES B-6 Optional Installations and Mode Switch Bank Settings B.4 SIMM UPGRADESIMM Upgrade B.4.1 Locating SIMMs B.4.2 Installing the DRAM SIMMB-8 Optional Installations and Mode Switch Bank Settings SIMM UpgradeConnector Connector Teeth Clip Side Notch Figure B-4 Installing the DRAMOptional Installations and Mode Switch Bank Settings B.5 INSTALLING OPTIONAL HSIM OR VHSIM INTERFACE MODULESInstalling Optional HSIM or VHSIM Interface Modules Figure B-5 HSIM and VHSIM Connector LocationsPage Numerics IndexIndex-2 Index