GarrettCom 500-Series manual Example 3 Magnum, Internet

Page 17

Magnum 500-Series Switching Hubs

Installation and User Guide (08/98)

Example 3 : Magnum 528

In another situation similar to Example 2 above, the network may need to be linked to a Fast Ethernet backbone. This application is handled by the Magnum 528 using one 100Mb switched port for local high speed servers and users, while using the other 100Mb switched port for a link upstream.

Using two Magnum 528s and linking a 100Mb switched port from each unit, one can implement a Fast Ethernet switched connection which can run in full duplex mode. The result is similar to “stacking” the two Magnum 528s to provide a net total 16 ports of switched 10Mb plus 2 ports of switched 100Mb.

When using a Magnum 528’s 100Mb switched port as a link, it is frequently desirable to make the connection to the upstream device using fiber cable operating at 100Mb speed. In this situation, an external 100Mb Media Converter unit (such as a Magnum 15E) is used to change from twisted pair cable to fiber cable.

Because commercially-available 100Mb Media Converters do not support 10/100 speed auto-negotiation, it is necessary in this situation to operate both ends of the fiber link with ports that have fixed 100Mb-speed capability. In addition, since 100Mb fiber cable has severe distance limitations at half-duplex, it is almost always necessary to operate such a fiber link in the full-duplex mode. Many low-end switching hubs that only have auto-negotiation on their 100Mb ports cannot support this application, but the Magnum 528 . . . with fixed 100Mb speed as a default setting, and with manually- selected half- or full-duplex mode per Fast Ethernet port . . . handles this readily.

100Mb Hub

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UPLINK

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100Mb Servers and Workstations

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10Mb Workgroup

Figure 2.4d: The Magnum 528 provides 100Mb ports for backbone connections.

GARRETT

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Contents Switching Hubs Trademarks Fax 510 Email support@garrettcom.com Contacting Garrett CommunicationsTable of Contents InstallationMagnum Specifications Warranty Power Supply Internal100Mb/s Multi-mode Port Optical Typical Worst LEDsMagnum Ordering InformationMagnum 528F-SC Magnum 528F-STInspecting the Package and Product Product Description Magnum 500-Series Switching HubsIntroduction Magnum 500-Series chassis 2a Front view Magnum 508, 528 and 528F Switching HubsUplink Frame Buffering and Latency @ 100Mb Fiber port, type ST or SC Magnum 528F models onlyGarrett High Performance Full-duplex or Half-duplex operation, auto-sensingAssured 100Mb performance in any network set-up Dynamic Buffer Space AllocationExample 1 Magnum ApplicationsExample 2 Magnum Internet Example 3 MagnumInternet Example 4 Magnum 528FLocating Magnum 500-Series switches InstallationMagnum 500-Series, metal mounting brackets Optional E-Stand Wall or Vertical Surface MountingMagnum 500-Series AC power connector 100BASE-TX connections Magnum 528 only Connecting Ethernet MediaMedia Ieee Standard 100BASE-TX connections Magnum 528F only Connecting Fiber Optic 100BASE-FX, Type ST and SCOperation Magnum 528’s internal jumpers for auto-negotiation on or OFFAddress Learning Switching FunctionalityFiltering and Forwarding LK/RX PWRFDX AutoAuto-negotiation option for Fast Ethernet copper ports Auto-negotiation for 10Mb ports, half- or full-duplex mode Collision-based Flow-control Before Calling for Assistance TroubleshootingNo Problem Found When Calling for AssistanceReturn Material Authorization RMA Procedure Shipping and Packaging Information B3.0 Applications Appendix B 48VDC AddendumB2.0 Magnum 508, 528 and 528F 48VDC Option B5.0 Operation B4.0 InstallationB6.0 Troubleshooting
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