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Appendix A. Cable Pinout Diagrams

A-3

Crossover 10BASE-T/100BASE-TX Cables for STP

Figure A-6. Crossover STP Cable (RJ-45 to IBM Data Connector)

Null-Modem Cable

A null-modem cable should be used for a direct connection from a PC serial port to
the 8237 Management Port.

Hub’s 9-Pin
Management Port

PC’s 9-Pin

COM Port

1 DCD

2 RXD

3 TXD

4 DTR

5 SGND

6 DSR

7 RTS

8 CTS

9 RI

Figure A-7. Null-Modem Cable Connection

Summary of Contents for 8237

Page 1: ......

Page 2: ......

Page 3: ...described in this publication at any time It is possible that this publication may contain reference to or information about IBM products machines and programs programming or services that are not ann...

Page 4: ...ment 8237s within a Stack 1 8 Segmenting 8237s within a Stack 1 8 Linking Segmented 8237s 1 8 Assigning Backup Ports 1 9 Ethernet Planning 1 9 Maximum Segment Lengths 1 10 Four Repeater Limit 1 10 Cab...

Page 5: ...nformation 3 7 SNMP Configuration 3 8 Segment Configuration 3 13 Hub Configuration 3 15 Port Configuration 3 19 Port Backups 3 25 Port Security Control 3 27 TFTP Download 3 30 Xmodem Download 3 31 Use...

Page 6: ...ASE TX Cables for STP A 2 Crossover 10BASE T 100BASE TX Cables A 2 Crossover 10BASE T 100BASE TX Cables for STP A 3 Null Modem Cable A 3 Appendix B The IBM 8237 Management Information Base B 1 Appendi...

Page 7: ...vi 8237 Hub Installation and Planning Guide...

Page 8: ...nsion Port Configuration MEP Panel 3 22 3 18 Expansion Port Configuration FEM Panel 3 23 3 19 Port Backups Panel 3 25 3 20 Port Intrusion Control Hub Selection Menu Panel 3 27 3 21 Port Security Contr...

Page 9: ...18 A 1 Straight Through UTP Cable RJ 45 to RJ 45 T568 A A 1 A 2 Straight Through UTP Cable RJ 45 to RJ 45 T568 B A 1 A 3 Straight Through STP Cable RJ 45 to IBM Data Connector A 2 A 4 Crossover UTP C...

Page 10: ...af kabler og udstyr Gevaar Voordat u begint met de installatie van dit produkt moet u eerst de veiligheidsinstructies lezen in de brochure PAS OP Veiligheidsinstructies Lees dit erst SD21 0030 Hierin...

Page 11: ...ipamentos Peligro Antes de empezar a instalar este producto lea la informaci n de seguridad en Atenci n Informaci n de Seguridad Lea Esto Primero SD21 0030 Este documento describe los procedimientos d...

Page 12: ...de nabijheid van de eenheid bevinden en gemakkelijk toegankelijk zijn Cuidado A tomada de corrente alternada deve estar pr xima da unidade e ser facilmente acess vel Pas p Stikkontakten skal v re plac...

Page 13: ...beim Ger t und leicht zug nglich sein Attenzione La presa di alimentazione ca deve essere collocata accanto all unit e deve essere facilmente accessibile Advarsel Stikkontakten m v re n r enheten og...

Page 14: ...10BASE T contains a non replaceable lithium battery that if disposed of improperly can cause a fire an explosion or a severe burn At the end of the life of this machine return the IBM 8237 Stackable E...

Page 15: ...xiv 8237 Hub Installation and Planning Guide...

Page 16: ...3 8237 Administration Helps you determine which administrative actions are available to your 8237 installation and then gives instructions for performing the actions Chapter 4 Troubleshooting Install...

Page 17: ...02 3 1993 edition Media Access Control MAC Parameters Physical Layer Medium Attachment Units and Repeater for 100 Mb s Operation Type 100BASE T Clauses 21 30 Commercial Building Telecommunications Cab...

Page 18: ...gory 3 4 or 5 100 ohm UTP or ScTP cabling or 150 ohm STP A cabling Each 8237 can accommodate an optional Media Expansion Port or Fast Expansion Module providing connectivity to AUI 10BASE2 10BASE FL 1...

Page 19: ...e collisions Jabber protection by disabling a port that receives 65 536 bits of continuous transmission and re enabling the port when the condition clears A serial management port for configuring the...

Page 20: ...tworks SNMP manageability over a Serial Line Internet Protocol SLIP link to the management port Support for BootP for configuring and upgrading the microcode of any 8237 Model 002 or Model 003 Support...

Page 21: ...that is physically next lowest in position in the stack will automatically assume primary management agent responsibility For more information on managed stacks see Understanding Managed Stacks on pag...

Page 22: ...used management information can be passed between hubs enabling management of an entire stack If hubs in a stack are configured into different segments they can still be managed by one Model 002 or Mo...

Page 23: ...rent segment Two 10BASE T 100BASE TX FEMs in an 8237 stack can serve as bridges joining three segments This approach shares network load across three 10 Mbps collision domains within the stack yet sti...

Page 24: ...arding mode and flow control are selectable under network management control via the 8237 private MIB Understanding Managed Stacks This section describes how 8237s in a stack communicate with one anot...

Page 25: ...ck performance This technique can help you localize a problem area to the devices attached to a specific 8237 Isolating User Groups You might have users in your network who have no need for connectivi...

Page 26: ...undant ports The primary and secondary ports can be on separate backplanes Note that you must establish two physical connections to the desired device When a backup port pair has been configured and a...

Page 27: ...length is between 45 7 m 150 ft and 75 m 246 ft count a stack as one and one half repeater hops Note There may be more than four repeaters within a collision domain as long as there are no more than...

Page 28: ...ocument known as T529 the most current version of this document is dated 1995 Many other countries use ISO IEC 11801 Information technology Generic cabling for customer premises It is good practice to...

Page 29: ...t Cabling Requirements for the Management Port The management port is a standard DB 9 male connector that provides an EIA TIA 232 E was RS 232 C serial interface You can connect locally with a null mo...

Page 30: ...up IP address of TFTP download server File name to download Execution mode of downloaded code Protocol to be enabled Segment group Segment IP address Segment netmask Segment gateway IP address Segment...

Page 31: ...mmended that the connection be made first to the 8237 and then to the ac outlet The 8237 s internal auto ranging power supply adapts to voltages between 100 and 240 V ac at frequencies of 50 to 60 Hz...

Page 32: ...1 2 is a declaration of the 8237 s noise emission characteristics Table 1 2 Noise Emission Characteristics of the 8237 LWAd LpAm LpA m Type Description Operating bels Idling bels Operating dB Idling...

Page 33: ...IP or IPX address Indicate whether an Expansion Port should be installed and if so the type that is AUI 10BASE2 10BASE FL FOIRL 10BASE T 100BASE TX or 100BASE FX For each port record an identifier fo...

Page 34: ...A power cord A safety manual A Stack Link cable If any item is missing or damaged contact your place of purchase 2Gather the other materials you will need Network documentation identifying devices and...

Page 35: ...unting screws not provided and the cable management bracket and place them within reach 5 Hold the 8237 in position in the rack and start the lower of the two screws that will secure the left bracket...

Page 36: ...installing this feature continue with the instructions under Installing and Routing Cables on page 2 4 Surface Mounting the 8237 1 Place the 8237 on a flat horizontal surface where it is to be used T...

Page 37: ...ecurely attached to the 8237 frame Installing and Routing Cables Remember these tips when connecting cables Avoid stretching or bending cables Avoid routing cables near potential sources of electromag...

Page 38: ...go to Powering On the 8237 on page 2 7 1 Connect one end of the cable to the Stack Link In port of the 8237 that is physically nearest the top of the stack Be sure that the cable is firmly seated and...

Page 39: ...your modem for specific instructions 2 Connect one end of the serial cable modem connection or one end of the null modem cable direct connection to the 8237 port labeled Management Figure 2 5 Locatio...

Page 40: ...rom left to right as each diagnostic test is performed During this time the Hub ID display will show the letter P to indicate that tests are in progress and the Backplane LEDs will continuously blink...

Page 41: ...2 8 8237 Hub Installation and Planning Guide...

Page 42: ...ain and install a terminal emulation software application that is compatible with your workstation s operating system and that supports VT100 emulation Communicating Using a Null Modem Cable The 8237...

Page 43: ...ou need to be certain that your emulation software supports communication with a device that is directly attached to your workstation Follow any special instructions from the application manufacturer...

Page 44: ...er the configuration of the 8237 All Model 002s and Model 003s are shipped with a user name of admin and no preset password A password can be assigned see User Passwords on page 3 32 Persons accessing...

Page 45: ...tion number between 1 and 10 for this 8237 In a managed stack the hub ID is assigned automatically by the primary management agent Also if you are relocating a Model 001 from a managed stack to anothe...

Page 46: ...password prompt If you have made changes but have not written them to memory you will be prompted to do this before exiting the user interface Set FEM Status If your Model 001 has an FEM installed en...

Page 47: ...trol Segment Configuration TFTP Download Hub Configuration XMODEM Download Port Configuration User Passwords Port Backups Management Port Config Statistics Panels Segment Statistics Port Statistics Hu...

Page 48: ...gent being restarted You are prompted before this action takes place System Information Selecting System Information on the Main Menu causes the panel illustrated in Figure 3 4 to be displayed System...

Page 49: ...n on the Main Menu causes the panel illustrated in Figure 3 5 to be displayed SNMP Configuration Return to Previous Panel Send Authentication Fail Trap YES SNMP Communities IP Trap Managers IPX Trap M...

Page 50: ...5 READ ONLY DISABLED Use arrow keys to move Enter to confirm Ctrl T to return to Main Menu Figure 3 6 SNMP Communities Panel Return to Previous Panel Return to the SNMP Configuration panel Community N...

Page 51: ...ic DISABLED 6 0 0 0 0 public DISABLED 7 0 0 0 0 public DISABLED 8 0 0 0 0 public DISABLED 9 0 0 0 0 public DISABLED 10 0 0 0 0 public DISABLED Use arrow keys to move Enter to confirm Ctrl T to return...

Page 52: ...ED 6 00 00 00 00 00 00 00 00 00 00 public DISABLED 7 00 00 00 00 00 00 00 00 00 00 public DISABLED 8 00 00 00 00 00 00 00 00 00 00 public DISABLED 9 00 00 00 00 00 00 00 00 00 00 public DISABLED 10 00...

Page 53: ...rn to Main Menu Figure 3 9 Auto Discovery Configuration Panel Return to Previous Panel Return to the SNMP Configuration panel Status These are selection fields to set the status of the IP and IPX auto...

Page 54: ...Use arrow keys to move Enter to confirm Ctrl T to return to Main Menu Figure 3 10 Segment Configuration Panel Return to Previous Panel Return to the Main Menu panel Segment Name This field is where y...

Page 55: ...ected the IPX frame type in use will be automatically recognized and configured Internal IPX Network This field is where you enter the internal IPX network address IP Protocol This is a selection fiel...

Page 56: ...ration Hub 5 Configuration Hub 6 Configuration Hub 7 Configuration Hub 8 Configuration Hub 9 Configuration Hub 10 Configuration Hub ID Configuration Use arrow keys to move Enter to confirm Ctrl T to r...

Page 57: ...This field displays the 8237 s position in the stack in top down order Type This field displays the hub model for example IBM8237 003 H W Ver This field displays the hardware level of this 8237 Name...

Page 58: ...P DOWNLOAD obtain the 8237 s IP information from the BootP server and then load microcode from the TFTP server BOOTP UPGRADE FIRMWARE get the IP information from the TFTP server download the microcode...

Page 59: ...7 NOT PRESENT 8 NOT PRESENT 9 NOT PRESENT 10 NOT PRESENT Enable Above Settings Use arrow keys to move Enter to confirm Ctrl T to return to Main Menu Figure 3 13 Hub ID Configuration Panel Return to Pr...

Page 60: ...thru 16 EP Use arrow keys to move Enter to confirm Ctrl T to return to Main Menu Figure 3 14 Port Configuration Port Selection Menu Panel Return to Previous Panel Return to the Main Menu panel When yo...

Page 61: ...Hub ID 1 Position 1 Port Name Type Admin State Oper State Link Auto Part 9 10BASE T ENABLED YES DOWN NOT PART 10 10BASE T ENABLED YES DOWN NOT PART 11 10BASE T ENABLED YES DOWN NOT PART 12 10BASE T EN...

Page 62: ...s current operating state The two values are YES and NO YES indicates that the port is operating NO indicates that either the port has been disabled or the port has been configured as one of a backup...

Page 63: ...o return to Main Menu Figure 3 17 Expansion Port Configuration MEP Panel Return to Previous Panel Return to the Port Configuration Port Selection panel Hub ID This field displays the hub ID number Pos...

Page 64: ...UT THROUGH Forwarding In Use ADAPTIVE CUT THROUGH Use arrow keys to move Enter to confirm Ctrl T to return to Main Menu Figure 3 18 Expansion Port Configuration FEM Panel Return to Previous Panel Retu...

Page 65: ...X and AUTO NEGOTIATION Duplex In Use This field displays the duplex mode status Possible values are HALF DUPLEX FULL DUPLEX AUTO NEGOTIATION NEGOTIATED HALF DUPLEX and NEGOTIATED FULL DUPLEX Back Pres...

Page 66: ...2 INACTIVE Use arrow keys to move Enter to confirm Ctrl T to return to Main Menu Figure 3 19 Port Backups Panel Return to Previous Panel Return to the Main Menu panel Set The identifier of the backup...

Page 67: ...eans that the primary port has failed and the secondary port has taken over To reset a backup pair so that the primary port is again handling network traffic reset the Action field to ACTIVE Note If a...

Page 68: ...L and AUTO The default setting is MANUAL configuration Selecting AUTO in the Mode field will cause the authorized address for each port of the hub to be automatically learned That is the source addres...

Page 69: ...turn to Previous Panel Hub ID 1 Position 1 Authorized Last Source Port Mode Address Address Intrusion Action Eavesdrop 9 MANUAL 000000 000000 FFFFFF FFFFFF INACTIVE INACTIVE 10 MANUAL 000000 000000 FF...

Page 70: ...CTIVE NOTIFY and NOTIFY AND DISABLE Notifications are issued in the form of trap messages If the port is set to DISABLE following receipt of an unauthorized communication it must be re enabled from th...

Page 71: ...gure 3 23 TFTP Download Panel Return to Previous Panel Return to the Main Menu panel Download Server IP This field is where you enter the IP address of the server where the microcode file is stored Do...

Page 72: ...ion field Possible values are TEMPORARY the microcode is not written to nonvolatile memory and will be lost if the system is restarted or powered off and PERMANENT the microcode is written to nonvolat...

Page 73: ...l Return to the Main Menu panel User Type The type of access for which the user name and password are being set The Admin user type has read and write authority and persons accessing the system using...

Page 74: ...Menu Figure 3 26 Management Port Configuration Panel Return to Previous Panel Return to the Main Menu panel Lockout Status This is a selection field that enables the Management Port lockout function P...

Page 75: ...panel Refresh Statistics Selecting this item causes all fields to be updated Frames The total number of frames received on the segment during the current operation cycle since the last reset or power...

Page 76: ...ics Hub 3 Statistics Hub 4 Statistics Hub 5 Statistics Hub 6 Statistics Hub 7 Statistics Hub 8 Statistics Hub 9 Statistics Hub 10 Statistics Use arrow keys to move Enter to confirm Ctrl T to return to...

Page 77: ...hub ID number Position This field displays the 8237 s position in the stack in top down order Frames The total number of frames received by the hub during the current operation cycle Bytes The total...

Page 78: ...10 11 12 13 14 15 16 EP 8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 EP 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 EP 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 EP Use arrow keys to move Enter to confirm Ctr...

Page 79: ...elds to be updated Hub ID This field displays the hub ID number Port ID This field displays the port ID number Position This field displays the 8237 s position in the stack in top down order Readable...

Page 80: ...s detected by the port during the current operation cycle Data Rate Mismatches Total number of data rate mismatches detected by the port during the current operation cycle Auto Partitions Total number...

Page 81: ...Ctrl T to return to Main Menu Figure 3 32 Expansion Port Statistics MEP Panel Return to Previous Panel Return to the Port Statistics Port Selection panel Refresh Statistics Selecting this item causes...

Page 82: ...current operation cycle Auto Partitions Total number of times this port has been auto partitioned during this operation cycle Total Errors Total errors detected by the port during the current operatio...

Page 83: ...current operation cycle In Bytes Number of bytes received by the FEM during the current operation cycle Out Frames Number of frames transmitted by the FEM during the current operation cycle Out Disca...

Page 84: ...EDs Table 3 1 on page 3 44 and Table 3 2 on page 3 45 give the meanings associated with the 8237 status and port LEDs Figure 3 34 Front View of the 8237 Model 002 or Model 003 Showing the LEDs Figure...

Page 85: ...low 1 1 collisions green 2 3 collisions green 3 5 collisions green 4 10 collisions yellow 5 15 or more collisions yellow These LEDs turn on in a manner similar to a bar graph For example if LEDs 1 2 a...

Page 86: ...ule is not connected Expansion Port Green On An Expansion Port is installed and is functioning correctly Off There is no Expansion Port installed Blinking The Expansion Port has failed Table 3 2 Port...

Page 87: ...code file will be in the format 8237xddd EXE where x is a number indicating the target product type 1 for Model 001 2 for Model 002 and 3 for Model 003 ddd is a 3 digit number that indicates the micro...

Page 88: ...t of band using SLIP When you connect using Telnet you will see the user interface that has already been documented in this chapter Configuring for SLIP The 8237 management unit supports two IP addres...

Page 89: ...For information on the user interface program see The 8237 User Interface Program on page 3 1 Setting an IP Address Using BootP If you have selected one of the BootP options on the Hub Configuration...

Page 90: ...Chapter 3 8237 Administration 3 49 address IP is its IP address SM is its IP subnet mask and GW is its default gateway or default router address...

Page 91: ...3 50 8237 Hub Installation and Planning Guide...

Page 92: ...rmal power on activity is for the Link Activity Partition and Utilization LEDs to blink ON OFF for 4 seconds all other LEDs remain ON during this time and the Hub ID display will show 18 Then as each...

Page 93: ...logically lowest you can look at the hub interconnect cables to see how they are attached The Expansion Port LED is OFF although power is ON and an Expansion Port is installed Replace the Expansion Po...

Page 94: ...install it in the replacement 8237 Attention Make sure that the power to an 8237 is disconnected before you remove or install its Expansion Port 4 Connect the cables to the ports of the replacement 82...

Page 95: ...st Results for a Model 001 If any of the tests indicates FAIL replace the field replaceable unit FRU indicated in the following list Replacement procedures are detailed in Installation Removal and Rep...

Page 96: ...st PASS FEM test Not Detected RMON Daughter Board test Not Detected System recognized as Model 002 POST flag is 1000 MAC Address is 00 60 94 E2 00 5D End of POST Entering the system Boot option normal...

Page 97: ...ress is 00 60 94 E2 00 5E End of POST Entering the system Boot option normal Figure 4 4 Example Self Test Results for Model 003 The replacement actions for failures of DRAM test EPROM test REPEATER te...

Page 98: ...the bootup IP addresses 7 Set hub segment Enter your choice Figure 4 5 Example of Microcode Failure for Model 002 and Model 003 The Download Menu is accessible after any restart by pressing Ctrl L Fr...

Page 99: ...wer supply replacement should be performed only by trained service personnel 8237 Hub Replacement To replace an 8237 perform the steps under Hot Swapping 8237s on page 4 3 Expansion Port Installation...

Page 100: ...e Expansion Port The port s LEDs should display the current activity Depending on which Expansion Port you have installed and your network configuration some of the following conditions might be indic...

Page 101: ...tion If you remove an Expansion Port without replacing it with another then you must replace the blank cover over the empty slot for proper cooling of the 8237 RMON Daughter Board Installation and Rep...

Page 102: ...sent remove the four screws that hold the board in place When the screws have been removed lift the board firmly from the sides to disconnect the RMON Daughter Board from the 8237 Figure 4 9 Remove th...

Page 103: ...vertical position and then lifting the SIMM up and out of its slot as shown See Figure 4 10 Figure 4 10 SIMM Removal Install the new SIMM by sliding it into the slot and rotating the top to the back a...

Page 104: ...a Remove the three top cover screws and mounting bracket on each side of the 8237 as shown in Figure 4 12 Figure 4 12 Removing the Top Cover Screws b Remove the two top fan guard screws on the rear o...

Page 105: ...Daughter Board by compressing the clip on each side of the SIMM rotating the top of the SIMM to a vertical position and then lifting the SIMM up and out of its slot as shown in Figure 4 15 Figure 4 15...

Page 106: ...aching the power cord to the 8237 and then to the ac outlet Fan Replacement 1 Remove power to the 8237 by disconnecting the ac cable from the ac outlet and then from the rear of the 8237 2 Remove the...

Page 107: ...uard Figure 4 19 Fan Replacement 5 Set the new fan in the 8237 The arrows on the fan go as shown in Figure 4 19 6 Replace the fan guard and the two fan mounting screws removed in step 4 7 Connect the...

Page 108: ...8852 1c 8237 Model 003 85H8862 2a Media Expansion Port AUI 10BASE2 85H8875 2b Media Expansion Port 10BASE FL FOIRL 85H8876 2c Fast Expansion Module 10BASE T 100BASE TX 85H8872 2d Fast Expansion Module...

Page 109: ...4 18 8237 Hub Installation and Planning Guide Figure 4 20 8237 Field Replaceable Parts...

Page 110: ...art Number U S Brazil Canada Latin America Asia Pacific Mexico 6952301 Japan 34G0232 Angola Austria Belgium Bulgaria Egypt Finland France Germany Greece Hungary Iceland Iran Lebanon Luxembourg Mozambi...

Page 111: ...ew all portions of this manual that pertain to the installation or replacement of features and be sure that you have followed all procedures 7 After completing these steps reassemble the 8237 and reco...

Page 112: ...Chapter 4 Troubleshooting Installation and Replacement Procedures 4 21 Outside the United States and Canada contact your place of purchase or your local IBM branch office...

Page 113: ...4 22 8237 Hub Installation and Planning Guide...

Page 114: ...straight through cables as shown schematically in Figure A 1 and Figure A 2 for UTP and Figure A 3 on page A 2 for STP Two standards are shown for wiring UTP connectors T568 A and T568 B The only diff...

Page 115: ...hen making 10BASE T 100BASE TX connections to other hubs The 8237 does not require crossover cables but if you need them Figure A 4 and Figure A 5 show you how to wire the connectors Two standards are...

Page 116: ...Connector Null Modem Cable A null modem cable should be used for a direct connection from a PC serial port to the 8237 Management Port Hub s 9 Pin Management Port PC s 9 Pin COM Port 1 DCD 1 DCD 2 RX...

Page 117: ...A 4 8237 Hub Installation and Planning Guide...

Page 118: ...finitions of Ethernet Like Objects In addition the 8237 supports the objects defined in this MIB Version 1 10 May 22 1997 IBM 8237 MIB DEFINITIONS BEGIN IMPORTS enterprises Counter TimeTicks IpAddress...

Page 119: ...accessible STATUS mandatory DESCRIPTION Community table communityMgt 3 communityEntry OBJECT TYPE SYNTAX CommunityEntry ACCESS not accessible STATUS mandatory INDEX communityIndex communityTable 1 Com...

Page 120: ...s is valid communityEntry 4 Trap manager group The trap manager group is used to define the nodes which can receive the trap messages sent by the agent trapManagerMgt OBJECT IDENTIFIER systemInfo 2 ip...

Page 121: ...ager ipTrapManagerEntry 3 ipTrapManagerStatus OBJECT TYPE SYNTAX INTEGER invalid 1 valid 2 ACCESS read write STATUS mandatory DESCRIPTION Trap messages are sent to a trap manager when its ipTrapMgrSta...

Page 122: ...twork manager ipxTrapManagerEntry 3 ipxTrapMgrStatus OBJECT TYPE SYNTAX INTEGER invalid 1 valid 2 ACCESS read write STATUS mandatory DESCRIPTION Trap messages are sent to a trap manager when its ipxTr...

Page 123: ...y feature of the SNMP managed device The feature operates as follows 1 The SNMP managed device sends the auto discovery trap at a time interval selected by the user 2 Traps are sent until an SNMP Get...

Page 124: ...ine the IPX SAP broadcasting parameters ipxAutoDiscoveryStatus OBJECT TYPE SYNTAX INTEGER enabled 1 disabled 2 ACCESS read write STATUS mandatory DESCRIPTION Setting this object to enabled 1 enables t...

Page 125: ...1 link bit 1 partition status 0 partitioned 1 not partitioned bit 2 port operation status 0 disabled 1 enabled bit 3 5 traffic status 000 no traffic 001 1 traffic 010 4 traffic 011 16 traffic 100 32 t...

Page 126: ...eserved 00 SNMP Agent not present 8237 001 01 SNMP Agent only 8237 002 10 SNMP agent with RMON 1 probe 8237 003 11 SNMP agent with RMON 2 probe 8237 003 bit 2 master status 0 subordinate 1 master bit...

Page 127: ...1 5 0100 10 0101 15 BYTE 24 fan status bit 0 fan status 0 bad 1 good bit 1 7 reserved basicStack 1 Basic Segment Object basicSegmentTable OBJECT TYPE SYNTAX SEQUENCE OF BasicSegmentEntry ACCESS not ac...

Page 128: ...ver Ethernet 0 disabled 1 enabled basicSegmentEntry 2 basicSegmentIpAddr OBJECT TYPE SYNTAX IpAddress ACCESS read write STATUS mandatory DESCRIPTION IP address of this segment The corresponding defini...

Page 129: ...rame 6 auto learn ipx8137 frame 7 auto learn ipx8022 frame 8 auto learn ipxsnap frame 9 ACCESS read write STATUS mandatory DESCRIPTION Default IPX frame type of the system Four types of IPX frame supp...

Page 130: ...DESCRIPTION A group means a single hub basicGroup 1 basicHubEntry OBJECT TYPE SYNTAX BasicHubEntry ACCESS not accessible STATUS mandatory INDEX basicHubIndex basicHubTable 1 BasicHubEntry SEQUENCE ba...

Page 131: ...datory DESCRIPTION Segment number of the backplane to which the hub is connected Value 0 means that the hub is isolated not attached to any segment basicHubEntry 4 basicHubName OBJECT TYPE SYNTAX Disp...

Page 132: ...imary 2 The agent in this segment is a primary agent backup 3 The agent in this segment is a backup agent basicHubEntry 12 basicHubAgentPhysAddr OBJECT TYPE SYNTAX PhysAddress ACCESS read only STATUS...

Page 133: ...bject basicFemTable OBJECT TYPE SYNTAX SEQUENCE OF BasicFemEntry ACCESS not accessible STATUS mandatory DESCRIPTION Basic information about FEM ports in a system Each port belongs to a group The group...

Page 134: ...ject to full duplex 2 enables the FEM port for full duplex mode so that the port can send and receive frames at the same time Setting this object to auto negotiation 3 lets the transceiver decide the...

Page 135: ...basicFemEntry 6 basicFemSpeed OBJECT TYPE SYNTAX INTEGER ACCESS read only STATUS mandatory DESCRIPTION Reflecting the speed of the FEM port The line speed is determined by the auto negotiation mechan...

Page 136: ...number If the value is not present 1 the variables in this branch are meaningless basicProbeEntry 2 basicProbeHwVer OBJECT TYPE SYNTAX INTEGER ACCESS read only STATUS mandatory DESCRIPTION Hardware ve...

Page 137: ...g 3 ACCESS read only STATUS mandatory DESCRIPTION Status of this RMON probe entry basicProbeEntry 9 Basic Port Object basicPort OBJECT IDENTIFIER basicInfo 4 basicPortTable OBJECT TYPE SYNTAX SEQUENCE...

Page 138: ...PTION Port type of a port basicPortEntry 3 basicPortLinkStatus OBJECT TYPE SYNTAX INTEGER goodlink 1 badlink 2 other 3 ACCESS read only STATUS mandatory DESCRIPTION Link status of a port basicPortEntr...

Page 139: ...rSegmentTotalBytes OBJECT TYPE SYNTAX Counter ACCESS read only STATUS mandatory DESCRIPTION Total bytes received by a segment monitorSegmentEntry 3 monitorSegmentCollisions OBJECT TYPE SYNTAX Counter...

Page 140: ...nitorHubIndex OBJECT TYPE SYNTAX INTEGER 1 10 ACCESS read only STATUS mandatory DESCRIPTION ID used to select a hub monitorHubEntry 1 monitorHubCollisions OBJECT TYPE SYNTAX Counter ACCESS read only S...

Page 141: ...gs Counter monitorFemRunts Counter monitorFemCollisions Counter monitorFemHubIndex OBJECT TYPE SYNTAX INTEGER 1 10 ACCESS read only STATUS mandatory DESCRIPTION ID used to select a hub monitorFemEntry...

Page 142: ...andatory DESCRIPTION Number of CRC errors received by the FEM port monitorFemEntry 8 monitorFemFrameTooLongs OBJECT TYPE SYNTAX Counter ACCESS read only STATUS mandatory DESCRIPTION Number of frames l...

Page 143: ...rtAction INTEGER backupIndex OBJECT TYPE SYNTAX INTEGER 1 18 ACCESS read only STATUS mandatory DESCRIPTION Backup table index backupPortEntry 1 backupPriPortGroup OBJECT TYPE SYNTAX INTEGER 1 10 ACCES...

Page 144: ...ctive 2 will attempt to recover the primary port and disable the secondary port Success here depends on the ability to establish a good link on the primary port The values stand by 3 and backup 4 are...

Page 145: ...hub will begin to read the source address of the first incoming error free frame The source address obtained will become the authorized address and the object securityAuthorizedAddr will be changed a...

Page 146: ...PRISE ibm8237 VARIABLES securityPortGroupIndex securityPortIndex DESCRIPTION An intrusion has occurred at the specified port 1 masterLinkFailEvent TRAP TYPE ENTERPRISE ibm8237 VARIABLES backupPriPortG...

Page 147: ...B 30 8237 Hub Installation and Planning Guide...

Page 148: ...hine and 2 at an engineering change level compatible with the feature conversion or upgrade Many of these transactions involve the removal of parts and their return to IBM You represent that all remov...

Page 149: ...IES APPLY AFTER THAT PERIOD Limitation of Liability Circumstances may arise where because of a default on IBM s part or other liability you are entitled to recover damages from IBM In each such instan...

Page 150: ...terference and 2 this device must accept any interference received including interference that may cause undesired operation Industry Canada Class A Emission Compliance Statement This Class A digital...

Page 151: ...reas and conforms to the standards set by the Voluntary Control Council for Interference by Information Technology Equipment aimed at preventing radio interference in commercial and industrial areas C...

Page 152: ...eter synonymous with micron s Microsecond One millionth part of one second Numerics 10BASE2 An IEEE 802 3 standard for baseband Ethernet data transmission at 10 Mbps over coaxial cable 10BASE FL An IE...

Page 153: ...e network automatically B back pressure A method of preventing network packets being transmitted onto a network segment by sending a jamming signal bandwidth 1 The difference expressed in hertz betwee...

Page 154: ...ransmissions on a channel T 2 When a frame from a transmitting adapter encounters any other signal in its path frame noise or another type of signal the adapter stops transmitting and a collision is r...

Page 155: ...d for mounting network components such as distribution panels and IBM 8237 Stackable Ethernet Hubs Synonymous with rack Ethernet A 10 or 100 megabit baseband local area network that allows multiple st...

Page 156: ...nt Interface hub In a network a point at which circuits are either connected or switched For example in a star network the central node or in a star ring network the location of wiring concentrators H...

Page 157: ...ce to verify connection local area network LAN A computer network located on a user s premises within a limited geographical area locally administered address In a local area network an adapter addres...

Page 158: ...divided into seven layers Each layer represents a group of related data processing and communication functions that can be carried out in a standard way to support different applications Open Systems...

Page 159: ...P addresses RFC Request for comments router An attaching device that connects two LAN segments which use similar or different architectures at the reference model network layer Contrast with bridge an...

Page 160: ...system switch On an adapter a mechanism used to select a value for enable or disable a configurable option or feature synchronous 1 Pertaining to two or more processes that depend on the occurrences...

Page 161: ...ted pair V V Volt VT100 A character mode workstation Characters are sent immediately to the host system when a key is pressed variable 1 In computer programming a character or group of characters that...

Page 162: ...for 100BASE FX FEM 1 12 for 10BASE2 MEP 1 11 for 10BASE FL MEP 1 11 for 10BASE T 100BASE TX FEM 1 12 for management port 1 12 labeling 2 4 maximum segment length 1 10 null modem connecting to managem...

Page 163: ...hubs 1 5 IP address setting for other 8237s 3 48 using BootP 3 48 using user interface 3 13 IP trap managers configuring 3 10 IPX address settting using user interface 3 14 IPX trap managers configur...

Page 164: ...b ID Configuration 3 18 Hub Statistics 3 36 Hub Statistics Hub Selection Menu 3 35 IP Trap Managers 3 10 IPX Trap Managers 3 11 Main Menu 3 6 Management Port Configuration 3 33 Port Backups 3 25 Port...

Page 165: ...pport 4 20 Telnet use in management 3 47 TFTP Trivial File Transfer Protocol configuration 3 30 upgrading microcode using 3 30 topology documenting 1 16 trademarks C 4 Trivial File Transfer Protocol S...

Page 166: ...Part Number 85H8847 Printed in Taiwan 85H8847 GA27 4186 00...

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IBM 8237, Installation And User Manual

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