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Magnum 3000 Stackable HubsInstallation and User Guide (07/06)

The IRB ribbon cables supplied with each Magnum 3000 base unit are slightly longer than the base unit height. Thus, an IRB cable segment has a small arc shape when it is properly installed. It is possible to have some long IRB ribbon cable segments, up to a few meters in length, for service loops and such. The operation of the stack will not be impaired by longer IRB ribbon cables. Stacks with total IRB lengths of as much as ten meters can be implemented. However, non-standard IRB cable lengths must be specially made.

The IRB ribbon cables may be installed and/or removed while a Magnum 3000 unit is powered without causing damage to the electronic circuits in that unit or any others in a Magnum 3000 stack. This is convenient for expanding a stack without shutting down the network, and for performing diagnostics and service on potentially faulty units operating in a stack. CAUTION: disconnecting an IRB ribbon cable can cause operational upsets by breaking the interconnection among the stacked units previously operating as a single repeater and/or with one SNMP agent.

2.3.2Segmenting a Magnum 3000 Stack with a Special Segmenting

Cable

Magnum 3000 Stackable Hubs are typically stacked as described in Section

2.3.1.However, it may be desirable to stack the 3000s so that they operate as separate repeater units. This will normally be done to manage several separate hubs (or small stacks) with a single 3000 AGT SNMP Agent box. In this situation, single units or several small stacks of units may be connected using SRC Segmenting Cables (part numbers SRC-2 and SRC-4, available as a spare part from GCI). Hubs connected via an IRB Segmenting Cable do not transmit or receive normal Ethernet traffic through the IRB.

GCI supports this non-standard configuration, making special stacking cable available (see Models SRC-2 and SRC-4 in the Spare Parts Price List) to provide the flexibility to break apart managed stacks into multiple collision domains for higher performance, while still maintaining the advantages of one SNMP agent.

Consider the case where it is desired to divide a managed stack into two segments and insert a local bridge to increase performance (see Figure 2.3.2a).

Normally, it would be necessary to add another SNMP agent to maintain full management. However, using the special Segmenting cable option, it is possible to remove one standard IRB cable and replace it with an SRC cable. This divides the stack

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Contents Magnum Stackable Hubs Trademarks Magnum Stackable Hubs Installation and User GuideContacting GarrettCom, Inc GarrettCom, IncRevisions PrefaceTable of Contents Specifications Magnum 3024, MagnumIntro Simple Ntwrk Mgmt Protocol Snmp AGENTS32 Magnum Line Specifications Magnum 3024, Magnum Packaging DC Power Supply OptionsLED Indicators on Chassis Front WarrantySpecifications Bridge Port Modules BPMs Bonus Ports Specifications Repeater Port Modules RPMs Bonus PortsNetwork Management Options Etsi and NEBS-certified models, -48VDC poweredOrdering Information Magnum 3000 Stackable Hubs and ConcentratorsInspecting the Package and Product Introduction Magnum 3012 and 3024 Stackable HubsProduct Description Magnum 3000 Stackable Hubs Stacking Magnum 3000s Magnum 3024 Hub 24 RJ-45 Ports, One PM bonus port slotWww . GarrettCom . com Cable Stack3 4 5 6 7 4a, Magnum 3012 Hub, Front View Magnum 3012 Hub 12 RJ-45 Ports, One PM bonus port slotRear Bonus Slot, Port Modules PMs 5c Magnum 3012 internal layout with configured Bonus Port Included only when PM is factory installedPM Ribbon cable with 16 pin connector Bonus port for optional PM card BPM shownCBL-AUI Features and Benefits, Magnum 3024 and 3012 Hubs Wing B Wing a ApplicationsInstallation and Operation Connecting Ethernet MediaConnecting Twisted Pair RJ-45, Unshielded or Shielded Connecting ThickNet 10BASE5 AUI Connecting ThinNet 10BASE2 BNCConnecting Drop Cable 10BASE5 DTE Associated ports at each end of the fiber optic segment Connecting Fiber Optic SC-type, Snap-OnConnecting Single-Mode Fiber Optic SMF At regular intervals you must use the color-coded strand on’cvr Rack-mountingOptional BPM-BNC BPM-AUI BPM-TP BPM-FST Introduction Magnum Port ModulesProduct Description, Port Modules RPM-BNC, RPM-AUI, RPM-DTE RPM-FST or FSC, RPM-SMF, RPM-TPRPM-BNC RPM-AUIDirectly Magnum RPM-BNC Www . GarrettCom . com Magnum RPM-DTE RPM-DTE2 AUI Pin Assignments Pin Function3 km RPM-FST Fiber ST, Twist-lock ConnectorMagnum RPM-FST Jumper AcrossMagnum RPM-SMF RPM-FSC Fiber SC, Snap-in ConnectorRPM-SMF Single-mode Fiber Magnum RPM-FSC10 Km RPM-TP Twisted PairJumper Across Distances Supported Not usedMagnum BPM-BNC BPM-BNCBPM-AUI BPM-FSTMagnum BPM-FST Segment distances up to 100m Ft., or shielded twisted pair wiringBPM-TP Environments with maximumIntroduction Simple Network Management Protocol Snmp Agents Snmp Agents DescriptionEmbedded Snmp Agent, Model 3000-MB Standard Repeater MIB and Extensions Separate Agent Box, Model 3000-AGTWww . GarrettCom . com 3 Magnum Snmp Agent Commands Variable Type Installing the Embedded Agent Board, MB Installation, General Information3b Magnum 3024, Top View with Cover Off Remove Chassis Cover of the hubSet Group # Stack Address Magnum 3024/3012 Magnum Snmp Agent BoardSwitch # 7 and Switch # 8 are not used Address\switchAgent Configuration, Embedded Agent and Agent Box Versions Eight-Position DIP Switch Configuration TableAutomatic Agent IP Address Configuration Manual IP Address ConfigurationPerforming Self Diagnostics Community # Names Manager Bootp IP/NAMEBootp Bootp IP/NAME Address IP/ NameManager Manager # IP/NAME Port Community Community Community # Name S Manager11/12/93 1145 Cr Other Convenience CommandsBefore Calling for Assistance When Calling for Assistance Return Material Authorization RMA ProcedureNo Problem Found Shipping and Packaging Information Appendix a Warranty InformationB3.0 Applications for DC Powered Hubs Appendix B Internal DC Power Supply OptionB1.0 Specifications for Magnum 3000S Power Supply Internal -48VDC OptionInstallation B4.0This section describes B5.0 Operation Appendix C Internal DC Dual-Source Power OptionTroubleshooting C1.0 Specifications for Magnum 3000S HubsC3.0 DUAL-SOURCE OPTION, Theory of Operation C4.0 Features and Benefits of the DUAL-SOURCE DesignC5.1 UL Requirements C5.0 InstallationC7.0 Operation C6.0 Ordering InformationExample Magnum 3012-48VDC Example Magnum 3024-24VDC or Magnum 3012-125VDC