Cabletron Systems SEHI100TX specs

Chapter 7: Local Management

OOW COLLISIONS

Displays the number of Out Of Window collisions. OOW collisions are usually caused by the network being too long where the round trip propagation delay is greater than 51.2 ∝s (the collision domain is too large), a station somewhere on the network is violating Carrier Sense and transmitting at will, or 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.

PORT SEG. STATUS

Displays the segmentation status of the port selected. The two possible status messages are Segmented or Unsegmented. The SEHI and SEH automatically partition problem segments, and reconnect non-problem segments to the network.

ENABLE PORT

This command lets the user enable the selected port.

DISABLE PORT

This command lets the user Disable the selected port.

7-22	SEHI100TX User’s Guide

Image 63

Cabletron Systems SEHI100TX manual Displays the number of errors due to misaligned packets

Contents

Intelligent Stackable HUB USER’S Guide SEHI100TX User’s Guide FCC Notice Cabletron SYSTEMS, INC. Program License Agreement United States Government Restricted Rights Contents Contents SEHI100TX User’s Guide Vii Chapter Introduction Using this Manual Following conventions are used throughout this document Document Conventions Related Manuals Getting Help Sehi Overview Chapter Sehi Features and Options Sehi Features and Options Sehi Features Stackable Capabilities Rack Mounting Capabilities Remote Network ManagementOptional 100BASE-TX and 100BASE-FX EPIMs Chapter Installation Requirements Specifications Cable SpecificationsHubSTACK Interconnect Cable Requirements UTP Cable Speciﬁcations Multimode Speciﬁcations for the EPIM-100FX Network Cable Lengths COM Port Requirements Network Port Specifications Operating Specifications Power Supply RequirementsEnvironmental Requirements Agency Approvals Physical Specifications Unpacking the Sehi Chapter Installation Nvram Switch Location PRE-INSTALLATION Checkout SEHI100TX-22 Tabletop or Shelf Installation Screws Strain-Relief Bracket Rackmount Installation Rackmount Installation Installing the Sehi in the Rack Powering UP and Stacking the Sehi Repeat steps 3 through 6 until all SEH hubs are connected Install an EPIM-100TX or an EPIM-100FX as follows Installing the EPIM-100TX or the EPIM-100FX Chapter Connecting to the Network Connecting the Sehi to the NetworkConnecting to Network Ports Sehi Network Ports Connecting a UTP Segment to an EPIM-100TX Position X crossed over RX+ TX+ Position = Not crossed over EPIM-100FX Port Connecting a Fiber Segment to the EPIM-100FX Testing the Installation Installation Test Chapter Troubleshooting Using Lanview Using Lanview Epim 1 RCV LED Using the Reset Button Setting the Nvram Switch Chapter Local Management Keyboard Conventions Function Local Management Keyboard Conventions Management Terminal Setup Console Cable Conﬁguration Management Terminal Setup Parameters Sehi Local Management Accessing Local Management Feature Selection Screen Feature Selection Screen Community Name Table Screen Community Name Table Screen Editing the Community Name Field Configuration Configuration Screen Displays the IP address of the Sehi Setting the Subnet Mask Setting the IP Address Using the Port Enable Override Setting the Default Gateway Trap Table Screen Exiting the Conﬁguration Screen Exiting the Trap Table Screen 1 Conﬁguring the Trap Table Snmp Tools Screen Snmp Tools Screen Lets you retrieve MIB objects using Snmp protocol Setting an OID Getting Individual OIDsGetting the Next OID Walking Through OIDs Viewing Multiple OIDs Stepping Through OIDs Cycling Through OIDsExiting the Snmp Tools Screen Device Statistics Screen Device Statistics Screen Displays the number of errors due to misaligned packets Module Number Sequence Selecting the Appropriate Module/Port Using the Enable Port Command Using the Disable Port CommandExiting the Device Statistics Screen Appendix a Epim Specifications Epim SpecificationsEPIM-100TX EPIM-100FX Appendix B Image File Download Using Oids Setting UP a Unix Workstation AS a Tftp Server Standard Local Download Table B-1 OIDs and Settings Numerics Index Index-2 Power Supply Cord