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Selecting Appropriate Cable Lengths

2-7

* With the exception of the 190 stations, which should be reduced if there are more than

25 stations with lobe lengths approaching 800 meters.

Lobe Cabling

Requirements

The section describes recommended twisted pair lobe cable
requirements for the following cable types:

■

STP Lobe Cables

■

UTP/Levels 3, 4, and 5 Lobe Cables

■

120 ohm (Screened Twisted Pair) Lobe Cables

STP Lobe Cables

Use STP cable that meets the requirements defined in

SP-2840:

Commercial Building Telecommunications Cabling Standard

(ANSI/TIA/EIA).

To maintain the performance of a robust network design, use wiring
that meets or exceeds the specifications defined in

Table 2-4

The attenuation listed in

Table 2-4

applies to cables at a temperature of

25° Celsius. The use of cables in an environment with temperatures
higher than 25° Celsius may result in decreased distances. Refer to the

Planning and Installation Guide for Customer Premises Cabling to
Support Attachment of ISO 8802-5 Token Ring Stations

for more

details.

Table 2-3

Maximum Lobe Lengths (in Meters)

Ring Speed

STP

UTP Level 5

UTP Level 4

UTP Level 3

Active (A)/
Passive (P)

4 Mbps

800

400

425

200

425

200

250

125

16 Mbps

400

200

225

100

210

100

N/A

Table 2-4

STP Network Cable Specifications

Characteristic

4 Mbps

16 Mbps

Impedance

135 to 165 ohm

135 to165 ohm

Attenuation (dB/100 m)

2.2 dB

4.5 dB

Crosstalk (dB maximum)

–58 dB

–40 dB

Содержание CoreBuilder 5000

Страница 1: ... http www 3com com CoreBuilder 5000 Token Ring Media Modules User Guide Document Number 17 00513 4 Published May 1997 ...

Страница 2: ...hed under a license agreement included with the product as a separate document in the hardcopy documentation or on the removable media in a directory file named LICENSE TXT If you are unable to locate a copy please contact 3Com and a copy will be sent to you Federal Communications Commission Notice This equipment was tested and found to comply with the limits for a Class A digital device pursuant ...

Страница 3: ...ANsentry LinkBuilder NETBuilder NETBuilder II NetFacts Parallel Tasking SmartAgent TokenDisk TokenLink Transcend TriChannel and ViewBuilder are registered trademarks of 3Com Corporation 3TECH CELLplex CoreBuilder EtherDisk EtherLink II FDDILink MultiProbe NetProbe and ONline are trademarks of 3Com Corporation 3ComFacts is a service mark of 3Com Corporation The 3Com Multichannel Architecture Commun...

Страница 4: ...ems Inc OPEN LOOK is a registered trademark of Unix System Laboratories Inc UNIX is a registered trademark of X Open Company Ltd in the United States and other countries Other brand and product names may be registered trademarks or trademarks of their respective holders ...

Страница 5: ...tter Reduction 1 2 Reducing Internal CoreBuilder 5000 Jitter 1 3 Reducing External Non CoreBuilder 5000 Jitter 1 3 Automatic Beacon Recovery 1 4 Address to Port Mapping 1 4 CoreBuilder 5000 Token Ring Modules 1 4 Active Per Port Switching Media Module 6218M ATPP 1 5 Active Per Module Switching Media Module 6218M ATP 1 7 Ring Mapping on the APM When Trunks Are Configured 1 8 Passive Media Module 62...

Страница 6: ... Cable Length Recommendations 2 6 Lobe Cabling Requirements 2 7 STP Lobe Cables 2 7 UTP Levels 3 4 and 5 Lobe Cables 2 8 120 ohm Screened Twisted Pair Lobe Cables 2 8 Connection Hardware 2 9 3Com Trunk Cable Recommendations 2 9 Copper Trunk Cables 2 9 Fiber Trunk Cables 2 9 Determining Fiber Cable Lengths Using Alternate Fiber Diameters 2 10 Using Media Filters 2 11 Configuration Examples 2 12 Tra...

Страница 7: ...s 3 17 Fiber Ring In Ring Out Connections 3 18 Where to Go From Here 3 18 4 CONFIGURING THE MODULE Configuration Overview 4 1 Before You Begin 4 2 Configuring the Modules 4 2 Setting Network Ring Speed 4 3 Selecting a Network 4 4 Assigning Modules 4 4 Assigning Ports 4 4 Enabling Ports 4 5 Enabling Beacon Recovery 4 5 Setting Beacon Threshold 4 6 Enabling Static Ring Switching 4 6 Enabling Mismatc...

Страница 8: ...tatus LED 5 3 Troubleshooting Using the Port Status LEDs 5 4 Troubleshooting Ring Problems 5 5 Problems Adding a New Station to an Operating Ring 5 5 Intermittent Errors on an Operating Ring 5 6 Ring Failures 5 6 Trunk Interoperability Problems 5 7 Technical Assistance 5 8 Where to Go From Here 5 8 A SPECIFICATIONS Token Ring Active Per Port Switching Media Module Specifications A 1 Token Ring Act...

Страница 9: ...em B 2 Access by Digital Modem B 2 3ComFacts Automated Fax Service B 3 3ComForum on CompuServe Online Service B 3 Support From Your Network Supplier B 4 Support From 3Com Corporation B 5 Returning Products for Repair B 6 Accessing the 3Com MIB B 6 Contacting 3Com Technical Publications B 7 INDEX 3COM CORPORATION LIMITED WARRANTY ...

Страница 10: ......

Страница 11: ...e Extended Ring Configuration 2 18 3 1 CoreBuilder 5000 Token Ring Module DIP Switch Locations 3 6 3 2 Active Per Port Module and Active Per Module Switching Module Jumper Setting 3 9 3 3 Location of CoreBuilder 5000 Token Ring Network Monitor Cards 3 11 3 4 Installing a CoreBuilder 5000 Token Ring Jitter Attenuator Card 3 13 3 5 Installing a Media Module 3 15 3 6 Opened and Closed Module Ejectors...

Страница 12: ......

Страница 13: ...m Cable Specifications 2 9 2 9 Multimode Fiber Specifications 2 10 2 10 Alternate Fiber Diameter Distances 2 10 2 11 Fiber Optical Budget 2 10 3 1 Procedures for Completing Installation 3 2 3 2 Network Select DIP Switch Settings 3 7 3 3 DIP Switch Setting Switches 5 through 8 3 8 4 1 CoreBuilder 5000 Compatibility Settings 4 12 4 2 ONline Compatibility Settings 4 13 4 3 Media Module LED Interpreta...

Страница 14: ......

Страница 15: ...agement Module DMM It also describes the Jitter Attenuator Card which helps stabilize trunk Ring In Ring Out connections to non CoreBuilder 5000 rings Before installing or using the Token Ring Media Modules read Chapters 1 2 and 3 of this guide for basic installation and operating instructions Audience This guide is intended for the following people at your site Network manager or administrator Ha...

Страница 16: ...System Hub Chapter 4 Configuring the Module Describes the network management commands used to configure the modules Also shows front panel LEDs and dip switches on the module Chapter 5 Troubleshooting Provides help in isolating and correcting problems that may arise when installing or operating CoreBuilder 5000 Token Ring Media Modules Appendix A Specifications Provides electrical environmental an...

Страница 17: ...ou begin read the readme txt file located in usr snm agents Text in angled brackets Italic text in braces User substituted identifiers In the command above substitute rem_name with the name of the remote machine Use the following command to show port details SHOW PORT slot all VERBOSE Capitalized text in plain brackets Keyboard entry by the user Type your password and press ENTER Italics Text emph...

Страница 18: ...e Distributed Management Module Commands Guide Describes each management command by providing detailed information on the command s format use and description Token Ring Media Module Quick Reference Cards Provide basic configuration and monitoring information for individual CoreBuilder 5000 Token Ring module types For a complete list of 3Com documents contact your 3Com representative Reference Doc...

Страница 19: ... Module Features CoreBuilder 5000 Token Ring Modules CoreBuilder 5000 Token Ring Module Features This section describes the following CoreBuilder 5000 Token Ring Media Module features Port Switching Module Switching Automatic Ring Speed Detection Active Port Retiming and Jitter Reduction Automatic Beacon Recovery Address to Port Mapping Port Switching CoreBuilder 5000 Token Ring port switching mod...

Страница 20: ...ature that prevents a station from entering an active ring if the station is configured for a speed other than the active ring s speed This wrong speed detection is implemented per port and works automatically with speed sensing Token Ring Adapter cards For example if you try to attach a station configured at 4 Mbps to an active ring configured at 16 Mbps the CoreBuilder 5000 Token Ring circuitry ...

Страница 21: ...LL tracks the incoming signal even in the presence of jitter thus allowing more margin for jitter sources A narrow band PLL removes all fluctuations in the recovered clock and provides a stable source to retime and retransmit the signal Reducing External Non CoreBuilder 5000 Jitter In addition to port level DPLLs CoreBuilder 5000 Token Ring Media Modules support optional Jitter Attenuator daughter...

Страница 22: ...ry functions even in the absence of a management module in the hub Address to Port Mapping CoreBuilder 5000 Token Ring Media Modules provide accurate hardware based address to port mapping capable of mapping multiple stations per port even for networks that incorporate fan out devices and MAC less stations for example network analyzers CoreBuilder 5000 Token Ring Modules This section describes the...

Страница 23: ...l media ports Simultaneous shielded and unshielded twisted pair cabling support Simultaneous 4 and 16 Mbps Token Ring networks when switched to the appropriate ring speed Can be switched on a per port basis to any of 10 CoreBuilder 5000 backplane rings or 11 isolated rings Accepts one optional Jitter Attenuation Card for use with the Ring In Ring Out ports when connecting to a non CoreBuilder 5000...

Страница 24: ...000 Token Ring Active Per Port Switching Media Module Figure 1 1 CoreBuilder 5000 Active Per Port Switching Media Module LED panel Actively retimed lobe ports Ports 17 and 18 configurable as Ring In Ring Out ports 18 R 1 1 7 R O 1 4 7 10 13 16 MOD STA JA RIRO ...

Страница 25: ...gs or to the one isolated ring Accepts one optional Jitter Attenuation Card for use with the optional Ring In Ring Out ports when connecting to non CoreBuilder 5000 RI RO Accepts a Token Ring Network Monitor Card TR NMC Address to port mapping including multi station ports fan outs and MAC less stations When an Active Per Module Media Module APM in trunk mode only has fan out devices attached in t...

Страница 26: ...ed there may be a mismatch in the port to station mapping when fan out or MAC less devices are present When a fanout or MAC less device is attached to an APM with trunks enabled the address map information may be inaccurate for ports below the fanout or MAC less device The address map information for the other modules on the same network is accurate If you use fanout or MAC less devices on an APM ...

Страница 27: ...Builder 5000 Token Ring Active Per Module Switching Media Module Figure 1 2 CoreBuilder 5000 Active Per Module Switching Media Module LED panel Actively retimed lobe ports Ports 17 and 18 configurable as Ring In Ring Out ports 18 R 1 1 7 R O 1 4 7 10 13 16 MOD STA JA RIRO ...

Страница 28: ...ou cannot however mix both wiring types on the same module Supports a variety of twisted pair cabling UTP categories 4 or 5 Supports either 4 or 16 Mbps Token Ring networks on a per module basis Supports fan out devices so that you can perform address to port mapping of up to eight end stations per port Can be switched on a per module basis to any of ten CoreBuilder 5000 backplane rings or to the ...

Страница 29: ... Token Ring Modules 1 11 Figure 1 3 illustrates the CoreBuilder 5000 Token Ring Passive Media Module Figure 1 3 CoreBuilder 5000 Token Ring Passive Media Module LED panel Passive media ports 3 6 9 12 15 18 MOD STA 1 2 ...

Страница 30: ...ed port switching ports for connecting devices to Token Ring networks using shielded or unshielded twisted pair cabling or both types simultaneously Industry standard ST fiber connectors which support multimode 62 5 125 µm fiber at distances up to 2 km Up to 11 individual rings per module and can switch ports among any of the 11 isolated or 10 backplane rings Accepts two Jitter Attenuation Cards a...

Страница 31: ... Ring Dual Fiber Repeater Module Figure 1 4 CoreBuilder 5000 Token Ring Dual Fiber Repeater Module LED panel Actively retimed lobe ports Fiber Ring In Ring Out ports 1 3 5 7 9 RI1 RI2 JA1 MODULE STATUS 2 4 6 8 10 RO1 RO2 JA2 TX RX TX R X TX R X TX R X RO 2 RI 2 RO 1 RI 1 1 2 3 4 5 6 7 8 9 10 ...

Страница 32: ...This ensures error free operation when interfacing with the CoreBuilder 5000 hub Connects to any CoreBuilder 5000 module supporting RI RO trunk ports Configures automatically using media module resident software to the appropriate Ring In or Ring Out receive trunk dependent on Trunk wrap or unwrap mode Use the Jitter Attenuator Card only with modules that make direct RI RO connections to non CoreB...

Страница 33: ...d Token Ring network Use the information in this chapter as a guide to plan your network This chapter contains the following sections Building a CoreBuilder 5000 Token Ring Network Determining the Maximum Number of Stations on a Ring Selecting Appropriate Cable Lengths Using Media Filters Configuration Examples ...

Страница 34: ...gs are allowed up to 190 stations Consider using significantly fewer than the maximum number of stations per ring Although the physical medium supports the specified station count networks may experience bandwidth problems if too many stations are added to a single ring Maximum station count means you can add stations up to the maximum limit without fear of physical layer problems disrupting the r...

Страница 35: ...e appropriate adapter cards and media filters when needed CoreBuilder 5000 Token Ring products are compatible with 802 5 compliant devices Not all media filters are the same 3Com offers an 802 5 optimized and fully compliant media filter 7 Determine whether you need Jitter Attenuator Cards Use Jitter Attenuator cards on Media Modules when attaching Ring In Ring Outs to non CoreBuilder 5000 network...

Страница 36: ...Lengths This section describes the cable lengths for CoreBuilder 5000 Token Ring Media Modules It is divided into the following sections Calculating Cable Lengths Copper Wiring Cabling Standards 3Com Lobe Cable Length Recommendations Lobe Cabling Requirements 3Com Trunk Cable Recommendations Determining Fiber Cable Lengths Using Alternate Fiber Diameters Calculating Cable Lengths Copper Wiring Thi...

Страница 37: ...not exceed a maximum attenuation of 19 dB in any configuration The channel is the transmission path from the medium interface connector MIC of one transmitter to the MIC of the next receiver in line 3Com uses 19 dB as the maximum channel attenuation when computing cable lengths Signal to NEXT Ratio To reduce effective channel attenuation maintain an adequate Signal to Near End Crosstalk NEXT Ratio...

Страница 38: ...upports these cabling practices and recommends customers follow these guidelines Cable lengths listed in this chapter are valid only with cables as defined by either the above mentioned documents or by EIA TIA Bulletin Technical Systems Bulletin Additional Cable Specifications for Unshielded Twisted Pair Cables TSB 36 November 1991 3Com Lobe Cable Length Recommendations The horizontal lobe distanc...

Страница 39: ...se wiring that meets or exceeds the specifications defined in Table 2 4 The attenuation listed in Table 2 4 applies to cables at a temperature of 25 Celsius The use of cables in an environment with temperatures higher than 25 Celsius may result in decreased distances Refer to the Planning and Installation Guide for Customer Premises Cabling to Support Attachment of ISO 8802 5 Token Ring Stations f...

Страница 40: ...evel 4 UTP cabling When using 120 ohm wire use only 120 ohm patch cables with 120 ohm in the wall wiring To maintain maximum performance of your network design when using the 120 ohm cable make sure the cable meets the requirements in Table 2 8 Table 2 5 UTP Level 3 Cable Specifications Characteristics 4 Mbps 16 Mbps Impedance 90 to 110 ohms 90 to 110 ohms Attenuation dB 100 m 5 6 dB 13 1 dB Cross...

Страница 41: ...nk Cables Fiber Trunk Cables Copper Trunk Cables Connect copper trunk ports using Unshielded Twisted Pair UTP 3 4 or 5 and Shielded Twisted Pair STP The distances are the same as the active lobe port distances Refer to Table 2 3 for trunk cable lengths However for the highest integrity use only STP and UTP 5 for connecting trunks When configuring ports 17 and 18 as trunks cable adapter 6200ADT RI ...

Страница 42: ...that you use By specification the maximum distance for any fiber length is 2 kilometers If you use 85 125 or 100 140 as your alternate fiber diameter distance you can overdrive the receiver Table 2 9 Multimode Fiber Specifications Wavelength Maximum Attenuation Maximum into Transmission Capacity MHz km 850 3 75 dB km 160 Table 2 10 Alternate Fiber Diameter Distances Alternate Diameter Fiber Size A...

Страница 43: ...NIC impedance For example you may try to use UTP wiring 100 ohm impedance with NIC cards that have STP 150 ohm output If you have a NIC that requires a media filter we recommend the 3Com media filter 5201F UTP which exceeds IEEE specifications for return loss and provides robust performance with most NICs Using other media filters may cause excessive attenuation or other loss thereby reducing achi...

Страница 44: ...tween users on different LANs 3 The backbone ring extends through the riser of the building through the CoreBuilder 5000 Dual Fiber Repeater Modules In the traditional backbone ring scenario the CoreBuilder 5000 Dual Fiber Repeater Modules are interconnected through their Ring In Ring Out ports The following conditions exist All Repeater Modules are assigned to the same backplane ring or are set t...

Страница 45: ...connecting three CoreBuilder 5000 hubs on different floors of a building Figure 2 1 Traditional Backbone Configuration A A A A A A A A A A A A A A A A A A AA AA AA A AA AA A AA A Bridge A A A A A A A A A A A A A Backbone AA AA A AA A A A AA AA AA AA A A A Bridge Bridge ...

Страница 46: ... master CoreBuilder 5000 hub is located in the central computer room on floor 1 of a 3 story building 2 The CoreBuilder 5000 hubs on floors 2 and 3 both contain CoreBuilder 5000 Dual Fiber Repeater modules that connect through the vertical riser of the building to two CoreBuilder 5000 Dual Fiber Repeater modules in the master concentrator 3 Traffic sent by the departmental LANs travels directly to...

Страница 47: ...inicomputer Servers Ring 3 Ring 4 TR NMC TR NMC Installed Daughter Cards T JIT Ring 1 Ring 2 Ring 3 A A AA AA AA AA AA A A AA AA A AA A Ring 2 AA AA A AA A Ring 1 Floor 2 TR NMC T JIT AA AA AA AA A A AA AA AA AA AA AA AA A A AA A A A A A A A A A A A A AA AA AA AA A A AA AA A AA A A A A A A A A A A A A A A A A A A A A A A A TR NMC TR NMC TR NMC Floor 1 IBM 8230 Bridge Router ...

Страница 48: ... Ring 1 file server to the Ring 1 end nodes Ring 2 Description Ring 2 works the same way Ring 1 works Ring 2 uses the second set of Ring In Ring Out ports on the Dual Fiber Repeater Module on the third floor to extend the ring down the vertical riser The Ring 2 file server is attached to the same Active Per Port Switching Media Module as the Ring 1 file server This is possible because you can swit...

Страница 49: ...cted by routing traffic through a multiport external bridge router Single Extended Ring Configuration The single extended ring configuration Connects users on distant points of a network to one extended local area network Accommodates organizations that have users dispersed in different areas of a building and want them configured into one Token Ring LAN Dual Fiber Repeater Modules provide main tr...

Страница 50: ...lder 5000 Token Ring Media Modules and optional daughter cards and how to set DIP switches AA AA A AA A AA AA A AA A AA AA A AA A AA AA A A AA AA AA A A A A A A A A A A A A A A A A A A A A A A A A A A AA AA AA A A A AA AA AA A A AA AA AA A A A A A A A A A A A A A A A A A A A A A A A A A AA AA A AA A AA AA A A AA AA AA A A A A A A A A A A A A A A A A AA AA AA AA A A AA A A AA AA A AA A AA AA A AA A...

Страница 51: ...e following topics Precautionary Procedures Quick Installation Unpacking Procedures Module Overview Setting the DIP Switches Installing Optional Daughter Cards Installing the Module CAUTION Read the precautionary procedures in this chapter before unpacking the module Precautionary Procedures Electrostatic discharge ESD can damage static sensitive devices on circuit boards Follow these precautions ...

Страница 52: ... the module Chapter 3 Unpacking Procedures 3 Configure the DIP switch settings If you have a network management module installed in the hub configure the module using the management commands described in Chapter 4 Chapter 3 Setting the DIP Switches or Chapter 4 Configuring the Module 4 Set the lobe trunk selection jumper Model Numbers 6218M ATPP and 6218M ATP Chapter 3 Setting the Lobe Trunk Jumpe...

Страница 53: ...ule appears to be damaged return it to the antistatic shielding bag repack it in the shipping carton and contact your local supplier Keep the shipping carton and antistatic shielding bag in which your module was shipped for future storage or shipment Record the serial number of your module The Hub Planning Charts located in the CoreBuilder 5000 reference binder are provided for this purpose 8 Esta...

Страница 54: ...etwork Monitor Card TR NMC to the module This card enables users to achieve SNMP network connectivity and gather network statistics for any of the CoreBuilder 5000 Token Ring backplane networks as well as for any individual isolated module level network Once you attach the card to a module you must assign the TR NMC card to the network you want to have inband connections to or gather statistics on...

Страница 55: ...ts NVRAM settings the module ignores all hardware DIP settings and uses its last stored software configuration Set whether or not the module uses a Speed Detect algorithm Passive Module only Other modules detect speed automatically The default is disable Set a ring speed for the module The default is 16 Mbps It is not possible to use the DIP switches on Token Ring Media Modules to assign individua...

Страница 56: ...000 Token Ring Module DIP Switch Locations ON OFF SW1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 ON OFF SW1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 Active Per Port Switching Module Dual Fiber Repeater Module Passive Module Active Per Module Switching Module DIP switch DIP switch ...

Страница 57: ... Table 3 3 describes the remaining DIP settings A complete definition of each DIP switch function appears in Chapter 4 Any combination of settings that does not match a specific backplane network causes the module to be isolated Table 3 2 Network Select DIP Switch Settings Network Selection Switch Settings Switch 1 Switch 2 Switch 3 Switch 4 1 default ON OFF OFF OFF 2 OFF ON OFF OFF 3 ON ON OFF OF...

Страница 58: ...and SET DEVICE DIP_CONFIG is set to ENABLE the hub checks the DIP switches for configuration information Table 3 3 DIP Switch Setting Switches 5 through 8 Switch Number Definition 5 ON configures modules from NVRAM OFF configures the module from DIP settings By default Switch 5 is set to ON 6 ON disables the Passive Media Module s speed detection algorithm Not Used by other Token Ring Media Module...

Страница 59: ...he jumper to the Left Selects Ring In Ring Out Right Selects lobe ports Use pliers or a screwdriver to carefully pry off the jumper Ports 17 and 18 do not function when you remove the jumper entirely When configuring ports 17 and 18 as trunks cable adapter 6200ADT RI must be connected on the port 18 Figure 3 2 Active Per Port Module and Active Per Module Switching Module Jumper Setting JP3 JP4 JP5...

Страница 60: ...Token Ring Media Module Figure 3 3 1 Match the TR NMC 50 pin connector to the corresponding connector on the host CoreBuilder 5000 Token Ring Media Module Make sure that the screws align with the holes on the standoffs on the media module 2 Seat the NMC connector onto the media module connector 3 Secure the NMC to the media module Tighten the screws down into the standoffs opposite the connector s...

Страница 61: ...ion of CoreBuilder 5000 Token Ring Network Monitor Cards Dual Fiber Repeater Module Connector Active Per Module Switching Module Connector Network Monitor Card Orientation ON OFF SW1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 Active Per Port Switching Module Passive Module ...

Страница 62: ...uator Card on a CoreBuilder 5000 Token Ring Media Module 1 Match the card s connector pins to the corresponding pins on the host CoreBuilder 5000 Token Ring Media Module Make sure that the standoffs align with the holes on the card 2 Seat the card s connector onto the module s connector 3 Secure the card to the media module by tightening the two screws on each end of the board see Figure 3 4 Be ca...

Страница 63: ...2 sw3 sw4 sw5 sw6 sw7 sw8 ON OFF SW1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 Active Per Port Switching Module Dual Fiber Repeater Module Passive Module Active Per Module Switching Module Jitter Attenuator Card Orientation relative to the standoffs and connector Connector Standoffs Connector Standoffs Connector Standoffs Connector Standoffs ...

Страница 64: ...Version 2 0 or later go to step 3 to complete the installation To configure the appropriate settings go to Chapter 4 Configuring the Module To insert the media module in an unmanaged hub configure the DIP switch settings on the module to the desired settings refer to Setting the DIP Switches earlier in this chapter and go to step 4 3 Determine if the hub has enough power for the new module by ente...

Страница 65: ... in Figure 3 5 the module into the board guides at the top and bottom of the slot and slide it into the hub by pressing firmly at the top and bottom of the faceplate Figure 3 5 shows the installation of the module Figure 3 5 Installing a Media Module ...

Страница 66: ...tors Figure 3 6 Figure 3 6 Opened and Closed Module Ejectors 7 Fasten the spring loaded screws on the front of the media module faceplate to the hub using your fingers do not over tighten Closed position Half height level Apply pressure here Opened position ...

Страница 67: ...tach the other end to a copper Ring In port on the second module 3 Interconnect any remaining modules using each module s Ring In Ring Out ports To form a full ring be sure to make connections using both the copper Ring In and Ring Out ports When you configure ports 17 and 18 on the active per port module or the active per module media module as RI RO install cable adapter 6200ADT RI on the Ring I...

Страница 68: ...iber cables to the fiber ports on the front panel of the module Make sure the transmit and receive cables are Clearly marked or color coded Connected to the appropriate ports on the module for example the fiber Ring In receive is connected to a fiber Ring Out transmit Do not exceed the bend radius for the fiber cable when directing the cables under the hub Refer to the cable manufacturer s specifi...

Страница 69: ...ement commands described in this section refer to the CoreBuilder 5000 Distributed Management Module Commands Guide Configuration Overview CoreBuilder 5000 network management modules provide network management for the CoreBuilder 5000 Integrated System Hub and its modules If you are using a Distributed Management Module DMM the DIP switch settings on the media module are ignored unless you set up ...

Страница 70: ...g Network Ring Speed Selecting a Network Enabling Ports Enabling Beacon Recovery Enabling Static Ring Switching Enabling Mismatch Resolution Passive and Active Per Module Media Modules Only Moving Rings from Module Level to Hub Level Setting Port Alert Filters Enabling Speed Detect Passive Module Only Setting Module Speed Threshold Passive Module Only For additional information on any network mana...

Страница 71: ...ing Speed Use the SET NETWORK TOKEN_RING RING_SPEED command to set the ring speed of a specified network Any module port trunk or daughter card assigned to the network is automatically set to the speed of the network The command sequence is SET NETWORK TOKEN_RING network RING_SPEED 4_MBP 16_MBPS Where network token_ring_1 to token_ring_10 isolated_1 slot isolated _11 slot The following command set...

Страница 72: ... The DIP switch settings on the media module assign all ports collectively on the module to network 1 through 10 or to an isolated segment Network management however assigns one or more ports to a network If you have a CoreBuilder 5000 TR NMC Network Management also assigns the NMC to a network The following command assigns a module or submodule to a network SET MODULE slot subslot NETWORK token_r...

Страница 73: ...and sequence is SET PORT slot port MODE enable disable slot all Use the SET PORT command to disable a port port 2 on the module in slot 6 set port 6 2 mode disable Enabling Beacon Recovery Use the SET NETWORK TOKEN_RING BCN_RECOVERY command to enable or disable the beacon recovery mechanism on a CoreBuilder 5000 network The default is enabled The command sequence is SET NETWORK TOKEN_RING network ...

Страница 74: ...e following command sets the beacon threshold of the Active Per Port Module in slot 7 to a maximum of 7 If this threshold is exceeded for a port or trunk that port or trunk is removed from the ring CB5000 set module 7 1 bcn_threshold 7 ENTER Threshold set to 7 The default value for Set Beacon Threshold is 7 A value of 0 zero means infinite therefore you will never reach the maximum threshold value...

Страница 75: ...er off the station to switch rings Enabling Mismatch Resolution Passive and Active Per Module Media Modules Only Use the SET NETWORK TOKEN_RING MISMATCH_RESOLUTION command to Enable the mismatch resolution algorithm for the specified network Perform address to port mapping when you use a splitter or fan out device on a CoreBuilder 5000 Token Ring port The default is disable The command sequence is...

Страница 76: ... each of the 10 available token rings on CoreBuilder 5000 port switching media modules either on a backplane hub wide or an isolated module level network Use this command to toggle sets of ports between backplane and isolated You may only toggle rings 1 through 10 You specify a slot number when indicating the isolated network the command affects The command only affects the specified slot and cann...

Страница 77: ... the SET PORT ALERT_FILTER command has been enabled for a port you must issue the SET ALERT PORT_UP_DOWN_FILTER command to allow or prevent port up and port down traps to be transmitted from the DMM to the designated trap receiver The DMM sends a port_up_down trap whenever a port on the stack starts operating goes up or stops operating goes down If you disable the port_up_down alerts the DMM does ...

Страница 78: ... Use the SET PORT SPEED_DETECT command to prevent stations from inserting into a ring at the incorrect speed When an incorrect speed station is detected the port is wrapped and the status is set to SPEED MISMATCH The port or trunk unwraps when a transition of phantom is detected or when the user disables and then re enables the port or trunk The default is disable The command sequence is SET PORT ...

Страница 79: ...shold 0 to 255 phantom transitions To reset this threshold disable and re enable the port from the management console Example The following command sets the speed threshold of the module in slot 7 to a maximum of 7 If this threshold is exceeded for a port or trunk that port or trunk is removed from the ring CB5000 set module 7 1 speed_threshold 7 ENTER Threshold set to 7 The default Threshold is 7...

Страница 80: ...OUT COMPATIBILITY_MODE command to ensure that the signalling used by a CoreBuilder 5000 trunk port is compatible with the trunk port connected at the other end of the copper or fiber cable Table 4 1 shows the compatibility settings to use when connecting a CoreBuilder 5000 trunk port Table 4 1 CoreBuilder 5000 Compatibility Settings To Connect CoreBuilder 5000 Modules to Set Compatibility Mode to ...

Страница 81: ...ou make configuration changes to a module and ports you must issue the SAVE MODULE_PORT command to save the new settings CAUTION Failure to save module settings may cause you to lose configuration data Showing Module Configurations You can display status information about the media module using the following network management commands SHOW MODULE SHOW MODULE VERBOSE SHOW PORT SHOW PORT VERBOSE Th...

Страница 82: ... VERBOSE command issued for a media module installed in slot 10 CB5000 Show module 5 1 verbose Slot Module Version Network General Information 05 01 6220M TP 1 00 0 TOKEN_RING_1 6220M TP CB5000 Token Ring Passive Module Switching Twisted Pair Module Boot Version 1 00 0 Ring Speed DIP Setting 16 MBPS DIP Network Setting ISOLATED Non Volatile DIP Setting DISABLED Recovery Asic Primary Address 52 41 ...

Страница 83: ...3 are shown CB5000 show port 7 all verbose Port Display for Module 6218M ATPP Port Mode Status Network General Information 07 01 ENABLED NO PHANTOM TOKEN_RING_1 Port is down Port Alert Filter DISABLED Port Connector RJ45S DIP Network Setting ISOLATED_11 Static Switch DISABLED 07 02 ENABLED NO PHANTOM TOKEN_RING_1 Port is down Port Alert Filter DISABLED Port Connector RJ45S DIP Network Setting ISOL...

Страница 84: ...D indicates the state of a port as described in Table 4 3 Figure 4 2 Media Module Faceplates 18 R 1 7 R O MOD STA JA RIRO MOD STA 1 2 MODULE STATUS TX RX TX RX TX RX TX R X RO 2 RI 2 RO 1 RI 1 1 2 3 4 5 6 7 8 9 10 1 3 5 7 9 RI1 RI2 JA1 2 4 6 8 10 RO1 RO2 JA2 18 R 1 7 R O MOD STA JA RIRO Active Per Port Switching Module Active Per Module Switching Module Passive Media Module Dual Fiber Repeater Mod...

Страница 85: ...e module initiates a test to all modules in the hub All LEDs should respond by lighting continuously for approximately five seconds Any LED that does not light is defective This test does not disrupt network operation Table 4 3 Media Module LED Interpretation LED Name Color State Indicates Module Status Green OFF No power Blinking Module failed self diagnostics ON Module powered up OK Ring In Ring...

Страница 86: ...sequentially cycles through each network connection Ethernet Token Ring then FDDI and lights each status LED associated with the network indicated on the DMM LCD display All isolated networks 1 through 11 light at the same time rather than one by one Where to Go From Here Once you complete this chapter proceed to Chapter 5 Chapter 5 Troubleshooting describes troubleshooting procedures for CoreBuil...

Страница 87: ...ken Ring Module Information on troubleshooting may assist you in verifying the module s operation This chapter is divided into the following parts General Troubleshooting Tips Troubleshooting Using the Status LEDs Troubleshooting Ring Problems Trunk Interoperability Problems Technical Assistance ...

Страница 88: ...s the network that the port port switching media modules or module module switching media modules is assigned to Only STP cabling or Level 4 or 5 UTP cabling used on the copper Ring In Ring Out ports Fiber cabling connects properly that is transmit always connects directly to receive Fiber Ring In port connects to a fiber Ring Out port Fiber ports on the module are used to connect only to other Co...

Страница 89: ... and some solutions for troubleshooting the Module Status LED Table 5 1 Troubleshooting Using the Module Status LED LED State Possible Cause Corrective Action OFF Hub power is off Check the controller module power LEDs The module or slot is faulty Try a different module Remove and re insert the module The hub does not have enough available power for a new module installation Use the SHOW POWER BUD...

Страница 90: ...he PC or other connected Faulty cable Replace the cable No cable connected to station Disable the port Station speed does not match the network speed Check the speed of the station and network Make sure the speeds match Station not inserted on ring Run your software application to cause the Token Ring end station to insert onto the ring OFF Port disabled Port disabled Enable port Module not receiv...

Страница 91: ...ard is set to the same ring speed as the hub port 3 Verify the presence of the DC phantom current generated by the station when requesting attachment to the ring Observe the front panel LED of the port connected to the failing station The LED should be blinking when no cable is attached or when the station has not yet requested attachment to the ring Once the station attaches to the ring the LED s...

Страница 92: ...ons Ring Failures In some situations an operating ring may fail However the ring wraps to the backup path and continues operation If a module fails it removes itself off of the backplane and the remainder of the ring continues to operate This may be reported by stations as Ring Beaconing or stations may simply fail to attach to the ring Module beacon recovery isolates virtually all faults in the d...

Страница 93: ...uilder 5000 ring 3 Only connect CoreBuilder 5000 fiber trunks to 3Com ONline System Concentrator 3Com CoreBuilder 5000 hub IBM 8250 hub IBM 8260 hub or IBM 8230 CAU trunk ports The JA LED on the module should light 4 Check that all cabling used meets the specifications outlined in Chapter 2 5 Check that the fiber cabling is connected properly that is transmit always connects directly to receive 6 ...

Страница 94: ...ement module being used Version of software installed on your CoreBuilder 5000 Token Ring Media Module Status of the front panel LEDs Configuration of your hub you may find it helpful to refer to the Hub Planning Chart in the CoreBuilder 5000 Reference Library for a record of this information Where to Go From Here If you complete this chapter and are still unable to ascertain the cause of a partic...

Страница 95: ...s Twisted Pair Copper Connector Pinouts Active Per Port and Active Per Module Media Module Ring In Port Adapter Pinout Token Ring Active Per Port Switching Media Module Specifications Data Rate 4 and 16 Mbps Connectors Shielded RJ 45 pinout appears later in this appendix Cable Requirements Supports UTP STP and 120 ohm Cabling Systems Power Requirements 38 w 5 V DC 0 5 w 12 V DC Mechanical Occupies...

Страница 96: ...d 1 Token Ring Network Monitor Card Environmental Operating Temperature Humidity BTUs hr 0 to 50 C 32 to 122 F Less than 95 noncondensing 96 9 Connectors Shielded RJ 45 ST Fiber Optic Data Rate 4 and 16 Mbps Cable Requirements Supports UTP STP and 120 ohm Cabling Systems Supports Fiber 62 5 125 µm 50 125 µm 85 125 µm 100 140 µm Power Requirements 37 w 5 V DC 0 5 w 12 V DC and 0 25 w 12 V DC Mechan...

Страница 97: ...onnectors ST type Connectors Shielded RJ 45 Data Rate 4 and 16 Mbps Cable Requirements Supports UTP STP and 120 ohm Cabling Systems Power Requirements 16 w 5 V DC 1 5 w 12 V DC and 1 25 w 12 V DC Mechanical Occupies One Slot Daughter Card Support 1 Token Ring Network Monitor Card Environmental Operating Temperature Humidity BTUs hr 0 to 50 C 32 to 122 F Less than 95 noncondensing 64 Connectors 30 ...

Страница 98: ...e A 1 If you do not configure the pairs this way the connection does not work properly Ensure an 8 pin connector on datagrade cable has the following pin pairings pins 4 and 5 are pair 1 pins 3 and 6 are pair 2 pins 1 and 2 are pair 3 not used pins 7 and 8 are pair 4 not used Figure A 1 RJ 45 Connector Pinouts 1 2 4 3 5 6 7 8 W G G W O BL W BL O W BR BR Hub Transmit Jack Positions Hub Receive Not ...

Страница 99: ... Adapter Pinout You do not need to refer to this wiring diagram if you use cable adapter 6200ADT RI Use the wiring diagram below Figure A 2 to create a device that imitates the function the optional ring in port adapter when you do not plan to use cable adapter 6200ADT RI Figure A 2 6200ADT RI Ring In Wire Diagram 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 ...

Страница 100: ......

Страница 101: ...site as described below This appendix describes Online Technical Services Support From Your Network Supplier Support From 3Com Corporation Returning Products for Repair Accessing the 3Com MIB Contacting 3Com Technical Publications Online Technical Services 3Com offers worldwide product support 24 hours a day 7 days a week through the following online systems World Wide Web Site 3Com Bulletin Board...

Страница 102: ... your modem to 8 data bits no parity and 1 stop bit Call the telephone number nearest you Access by Digital Modem ISDN users can call 3ComBBS using a digital modem for fast access up to 56 Kbps To access 3ComBBS using ISDN use the following number 408 654 2703 Country Data Rate Telephone Number Australia up to 14400 bps 61 2 9955 2073 Brazil up to 14400 bps 55 11 547 9666 France up to 14400 bps 33...

Страница 103: ...ning patches software drivers and technical articles about 3Com products as well as a messaging section for peer support To use 3ComForum you need a CompuServe account To use 3ComForum 1 Log on to CompuServe 2 Type go threecom 3 Press Return to view the 3ComForum main menu Country Telephone Number Hong Kong 852 2537 5610 U K 44 1442 278279 U S A 1 408 727 7021 Country Telephone Number Country Tele...

Страница 104: ...ing network planning installation hardware maintenance application training and support services If you contact your network supplier for assistance have the following information ready Diagnostic error messages A list of system hardware and software including revision levels Details about recent configuration changes if applicable If you are unable to contact your network supplier refer to the fo...

Страница 105: ...8492 568 Beijing 86 21 6374 0220 Ext 6115 Shanghai 852 2501 1111 91 11 644 3974 62 21 523 9181 82 2 319 4711 60 3 732 7910 65 538 9368 886 2 377 5850 662 231 8151 4 32 725 0202 31 30 6029700 403 265 3266 514 683 3266 613 566 7055 416 498 3266 604 434 3266 33 1 69 86 68 00 43 1 5134323 42 2 21845 800 49 30 3498790 Berlin 49 89 627320 Munich 36 1 250 83 41 48 22 6451351 41 31 996 14 14 3Com Ireland ...

Страница 106: ... 65 2 Enter the login name anonymous 3 Enter your full Internet e mail address as the password for example jdoe company com 4 Change to the pub mibs directory using the command cd pub mibs 5 Read the readisd txt file to determine the MIB or MIBs you need to manage your 3Com products 6 To view the 3Com MIB OID or schema entries enter the ls command To pause the display press Ctrl S To continue the ...

Страница 107: ...m Technical Publications B 7 Contacting 3Com Technical Publications If you have comments or questions on 3Com Technical Publications documents contact the Technical Publications group by fax at 508 229 1551 02 06 97 ...

Страница 108: ......

Страница 109: ...5 2 8 Cabling standards 2 6 Channel attenuation 2 5 Chapter descriptions 1 Collapsed backbone architecture 2 14 Collapsed backbone ring description 2 14 CompuServe B 3 Configuration media module 4 1 Configuration commands assign module 4 4 assign ports 4 4 enable ports 4 5 enable static ring switching 4 6 set network ring speed 4 3 Configuration examples 2 12 Configuration rules maximum lobe lengt...

Страница 110: ... 2 6 maximum distances 2 7 UTP Level 4 2 8 lobe lengths maximum 2 3 M Maximum copper trunk lengths 2 7 lobe lengths 2 6 2 7 station count 2 4 Maximum lobe lengths 2 7 Media filters 2 11 Media module features 1 1 installing 3 2 3 14 LEDs 4 17 procedures for handling 3 1 Media module LEDs interpreting 4 17 Media modules listed 1 4 Medium Interface Connector MIC 2 5 MIBs 3Com B 6 Mismatch resolution ...

Страница 111: ...rd A 3 Passive Media Module A 3 Speed detection 1 2 DIP setting 3 8 enabling 4 10 Standards for cabling 2 6 Static ring switching enable 4 6 Stations maximum number 2 2 2 4 Status LEDs troubleshooting 5 4 STP 2 7 cables 2 7 T Technical Assistance 5 8 technical support B 1 3Com URL B 2 bulletin board service B 2 fax service B 3 network suppliers B 4 product repair B 6 using CompuServe B 3 Token Rin...

Страница 112: ...4 INDEX V Verification LEDs 4 17 network assignments 4 17 W Wiring 2 4 copper 2 4 in the wall 2 8 World Wide Web B 2 WWW B 2 ...

Страница 113: ...t the operation of the software products will be uninterrupted or error free or that all defects in the software products will be corrected For any third party products listed in the 3Com software product documentation or specifications as being compatible 3Com will make reasonable efforts to provide compatibility except where the noncompatibility is caused by a bug or defect in the third party s ...

Страница 114: ...CTION WITH THE SALE INSTALLATION MAINTENANCE USE PERFORMANCE FAILURE OR INTERRUPTION OF ITS PRODUCTS EVEN IF 3COM OR ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND LIMITS ITS LIABILITY TO REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT 3COM S OPTION THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ...

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