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Cabletron Systems SEHI100TX-22 manual Displays the number of errors received

Models: SEHI100TX-22

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The Device Statistics Screen

ERRORS RECEIVED

Displays the number of errors received.

COLLISIONS

Displays the number of collisions received.

OOW COLLISIONS

Displays the number of Out Of Window collisions. OOW collisions are usually caused by one or more of the following:

•The network being too long due to the round trip propagation delay being greater than 5.12 ∝s (the collision domain is too large).

•A station somewhere on the network is violating Carrier Sense and is transmitting at will.

•A cable somewhere on the network failed during the transmission of the packet.

CRC ERRORS

Displays the number of packets with bad Cyclic Redundancy Checks (CRC) that have been received from the network. The CRC is a 4-byte ﬁeld in the data packet that ensures that the transmitted data that is received is the same as the data that was originally sent.

ALIGNMENT ERRORS

Displays the number of errors due to misaligned packets.

RUNT PACKETS

Displays the number of runt packets received from the network. A runt packet is less than the minimum Ethernet frame size of 64 bytes, not including preamble.

GIANT PACKETS

Displays the number of packets received that exceed 1518 data bytes, not including preamble.

PORT ADMIN. STATUS

Displays the administrative status of the port selected. The two possible status messages are Enable or Disable.

SEHI100TX User’s Guide

7-25

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Cabletron Systems SEHI100TX-22 manual Displays the number of errors received

Contents

SEHI100TX-22 100BASE-T INTELLIGENT STACKABLE HUB USER’S GUIDE Page FCC NOTICE Only qualiﬁed personnel should perform installation proceduresSEHI100TX User’s Guide VCCI NOTICE DOC NOTICECABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT SEHI100TX User’s GuideCABLETRON SOFTWARE PROGRAM LICENSE EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITYUNITED STATES GOVERNMENT RESTRICTED RIGHTS SEHI100TX User’s GuideSEHI100TX User’s Guide DECLARATION OF CONFORMITYCHAPTER 2 SEHI FEATURES AND OPTIONS CONTENTSINSTALLATION REQUIREMENTS AND SPECIFICATIONSCHAPTER 5 CONNECTING TO THE NETWORK ContentsTROUBLESHOOTING CHAPTEREPIM SPECIFICATIONS ContentsAPPENDIX B IMAGE FILE DOWNLOAD USING OID STRINGS APPENDIX Aviii ContentsSEHI100TX User’s Guide CHAPTER INTRODUCTION 1.1 USING THIS MANUAL1.2 DOCUMENT CONVENTIONS anonymous 1.3 GETTING HELPyour email address Chapter 1 Introduction 1.4 RELATED MANUALSSEHI100TX User’s Guide 2.1 SEHI OVERVIEW CHAPTER SEHI FEATURES AND OPTIONS2.2 SEHI FEATURES RESET Button 2.3 STACKABLE CAPABILITIESLANVIEW LEDs Local Management2.5 REMOTE NETWORK MANAGEMENT 2.4 RACK MOUNTING CAPABILITIES2.6 OPTIONAL EPIMS 3.1 CABLE SPECIFICATIONS CHAPTER INSTALLATION REQUIREMENTS AND SPECIFICATIONS3.1.1 HubSTACK Interconnect Cable Requirements 3.1.2 UTP Cable Speciﬁcations Propagation Delay 3.1.3 Multimode Fiber Optic Cable SpeciﬁcationsTemperature Fiber Optic Budget and Propagation Delay3.2 NETWORK CABLE LENGTHS A DTE Network Cable LengthsSEHI100TX-22 Repeater B DTE The maximum length of an individual UTP segment may be no3.4 COM PORT REQUIREMENTS 3.3 NETWORK PORT SPECIFICATIONS3.5.1 Power Supply Requirements 3.5 OPERATING SPECIFICATIONS3.5.2 Environmental Requirements 3.5.3 Agency ApprovalsDimensions H x W x D 3.6 PHYSICAL SPECIFICATIONSWeight Chapter 3 Installation Requirements and Speciﬁcations4.1 UNPACKING THE SEHI CHAPTER INSTALLATIONRear of Chassis NVRAM Switch located behind grating 4.2 PRE-INSTALLATION CHECKOUT4.4 RACKMOUNT INSTALLATION 4.3 TABLETOP OR SHELF INSTALLATIONProceed to Section 4.5, Powering Up and Stacking the SEHI Rack mounting the SEHI involves the following Rack Mounting the SEHI Figure 4-4 Installing the Rack Mounting BracketsFasten the SEHI to the equipment rack securely Proceed to Section 4.5, Powering Up and Stacking the SEHI4.5 POWERING UP AND STACKING THE SEHI 7. Repeat steps 3 through 6 until all SEH hubs are connected 4.6 INSTALLING AN EPIM 4-10 Chapter 4 InstallationSEHI100TX User’s Guide 5.1 CONNECTING THE SEHI TO THE NETWORK CHAPTER CONNECTING TO THE NETWORK5.1.1 Connecting to Network Ports 5.1.2 Connecting to an EPIM-100TX Position X crossed over Figure 5-2 EPIM-100TX Crossover Switch6. TX 5.1.3 Connecting to an EPIM-100FX or EPIM-100FMB Testing the Installation 5.2 TESTING THE INSTALLATIONSEHI100TX User’s Guide SEHI100TX User’s Guide Chapter 5 Connecting to the Network6.1 INSTALLATION TEST CHAPTER TROUBLESHOOTING6.2 USING LANVIEW Flashing indicates an irregular LED pulse SEHI100TX-22Blinking indicates a steady LED pulse 6.3 USING THE RESET BUTTON 6.4 SETTING THE NVRAM SWITCH SEHI100TX User’s Guide Chapter 6 TroubleshootingCHAPTER LOCAL MANAGEMENT Chapter 7 Local Management 7.1 KEYBOARD CONVENTIONSSEHI100TX User’s Guide Table 7-1 Keyboard Conventions7.2 MANAGEMENT TERMINAL SETUP Connect the console cable to the SEHI as follows Management Terminal Setup Parameters 7.3 ACCESSING LOCAL MANAGEMENT 3. Press ENTER Figure 7-3 Feature Selection Screen 7.4 THE FEATURE SELECTION SCREENFigure 7-4 Community Name Table Screen 7.5 THE COMMUNITY NAME TABLE SCREENACCESS write access to Local Management. Super-UserThis allows the user to read and write to Local COMMUNITY NAME7.5.1 Editing the Community Name Field 7.6 THE CONFIGURATION SCREEN 7.6.1 Setting the IP Address Consult the Network Administrator prior to setting the Subnet Mask 7.6.2 Setting the Subnet Mask7.6.4 Using the Port Enable Override 7.6.3 Setting the Default Gateway7.6.5 Exiting the Conﬁguration Screen 7.7 THE TRAP TABLE SCREEN 7.7.1 Conﬁguring the Trap Table 7.8 THE SNMP TOOLS SCREEN 7.7.2 Exiting the Trap Table ScreenThe following sections describe SNMP Tools screen ﬁelds 7.8.1 Getting Individual OIDs 7.8.2 Getting the Next OID 7.8.3 Setting an OID7.8.5 Walking Through OIDs 7.8.4 Viewing Multiple OIDs7.8.7 Cycling Through OIDs 7.8.6 Stepping Through OIDs7.8.8 Repeating the Last OID 7.8.9 Exiting the SNMP Tools Screen7.9 THE DEVICE STATISTICS SCREEN Displays the number of errors received This command lets the user enable the selected port 7.9.3 Using the DISABLE PORT Command 7.9.2 Using the ENABLE PORT Command7.9.1 Selecting the Appropriate Module/Port 7.9.5 Exiting the Device Statistics Screen 7.9.4 Setting the UPDATE-FREQency FieldA.1 EPIM SPECIFICATIONS APPENDIX A EPIM SPECIFICATIONSA.1.1 EPIM-100TX Appendix A EPIM Speciﬁcations A.1.2 EPIM-100FXA.1.3 EPIM-100FMB SEHI100TX User’s Guide Appendix A EPIM SpeciﬁcationsAPPENDIX B IMAGE FILE DOWNLOAD USING OID STRINGS B.1 SETTING UNIX WORKSTATION AS TFTP SERVER B.2 STANDARD LOCAL DOWNLOAD Table B-1 OIDs and Settings Appendix B Image File Download Using OID StringsSEHI100TX User’s Guide StepNumerics INDEXSEHI100TX User’s Guide Index-1Page GERMAN POWER SUPPLY CORDSPANISH FRENCH