Bytes Received, Frames Received | Cabletron Systems SEHI-22 manual

LOCAL MANAGEMENT

Bytes Received

Displays the number of bytes received.

Frames Received

Displays the number of frames received.

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 the network being too long where the round trip propagation delay is greater than 51.2 ∝ sec (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 whose size exceeded 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.

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Cabletron Systems SEHI-22 Bytes Received, Frames Received, Errors Received, OOW Collisions, CRC Errors, Runt Packets

Contents

10BASE-T Intelligent Stackable HUB USER’S Guide Printed On Recycled Paper FCC Notice DOC Notice Cabletron SYSTEMS, INC Program License Agreement Cabletron Software Program License Exclusion of Warranty Disclaimer of Liability United States Government Restricted Rights Table of Contents Installation Connecting to the NetworkTroubleshooting Local Management Contents Appendix B Twisted Pair Wiring Tables A-1 Using this Manual Chapter Introduction Introduction Getting Help Sehi Overview Sehi Features Repeater FunctionalityPolarity Detection and Correction Flash EEPROMs Reset Button Lanview LEDsLocal Management Stackable Capabilities Introduction Optional Features Epim Related Manuals Daughter Board Upgrade KitRack Mount or Wall Mount Hardware Cable Specifications HubSTACK Interconnect Cable Requirements Length Insertion LossImpedance Jitter Delay TemperatureCrosstalk Noise Fiber Optic Budget and Propagation Delay Cable Type Attenuation Maximum Cable Length Installation REQUIREMENTS/SPECIFICATIONS Connectors Thin-Net Network Requirements for the EPIM-C ModuleCable Type Terminators AUI Cable Network Port SpecificationsAUI Cable Requirements for the EPIM-A and EPIM-X Modules SEHI-22 and SEHI-24 Network Port Speciﬁcations SEHI-32 and SEHI-34 Network Port Speciﬁcations Pin Champ Connector Installation REQUIREMENTS/SPECIFICATIONS Epim Specifications EPIM-T EPIM-F1 and EPIM-F2 Parameter Typical Worst Worst Case Typical Value Budget EPIM-F3 EPIM-F3 Parameter Typical Minimum Maximum Connector Type EPIM-C EPIM-A and EPIM-X AUI Port EPIM-A and EPIM-X COM Transceiver Requirements Delay Times Start of Packets Delay Times JAMGeneral Preamble Fault Protection Power Supply RequirementsOutput Min. Load Max. Load Max Power JAM Output Safety Physical Installing the Sehi Unpacking the Sehi Stacking the Sehi Stacking the Sehi Attaching the Strain Relief Bracket Disconnect SEH and Sehi Interconnect Cables At the OUT Port Installing the Sehi in the Rack Rack Mounting the Sehi Wall Mounting the Sehi Free-Standing Installation Shelf or Table-top Installation Installation Connecting the Sehi to the Power Source Connecting the Sehi to the Network Connecting to Network Ports, SEHI-22 and SEHI-24 EPIM-2 Connecting to Network Ports, SEHI-32 and SEHI-34 Connecting a UTP Segment to an EPIM-T EPIM-T Cross-over Switch Connecting to the Network Connecting to the Network Connecting to the Network Connecting a Thin-Net Segment to an EPIM-C EPIM-C Connecting an AUI Cable to an EPIM-A EPIM-A Connecting an AUI Cable to an EPIM-X Finishing the Installation On Position Toward Back Epim OFF Position Toward Front Chapter Troubleshooting Installation CHECK-OUT Using Lanview PWR CPU Troubleshooting CLN Using the Reset ButtonRCV LNK Chapter Local Management Local Management Management Terminal Requirements Console Cable Conﬁguration Management Terminal Connection Management Terminal Setup Parameters Menu Function Selection Display SetupGeneral Setup Setup Local Management Accessing Local Management Sehi Local Management Feature Selection Screen Local Management Using the Local Management Screens Community Name Table Screen Access Community Name Editing the Community Name Field Conﬁguration Screen IP Address Default Gateway Port Enable OverrideSetting the IP Address SubNet Mask Setting the Subnet Mask Setting the Default Gateway Using the Port Enable Override Exiting the Configuration Screen Trap Table Screen Configuring the Trap Table Snmp Community NameTraps Trap IP Address Exiting the Trap Table Screen Snmp Tools Screen OID Prepend GetSet Get Next Walk Recall-OIDStep Cycles Getting Individual OIDs Getting the Next OID Setting an OID Viewing Multiple OIDs Cycling Through OIDs Walking Through OIDsStepping Through OIDs Exiting the Snmp Tools Screen Device Statistics Screen Errors Received CRC ErrorsAlignment Errors Port Admin. Status Enable Port Disable PortUpdate-Freq Port Seg. Status Using the Enable Port Command Selecting the Appropriate Module/Port Using the Disable Port Command Exiting the Device Statistics Screen Appendix a Twisted Pair Wiring Tables Twisted Pair Wiring Tables A-2 A-3 A-4 Drop Device From Punch Down To RJ-45 Into Block Wallplate Ofﬁce10BASE-T A-6 A-7 SEHI-32/34 Punch Wall Plate Champ Down Block If Required Ethernet Device Figure A-1. Punch Down Block A-9 Power Supply Cord GermanSpanish French