GarrettCom 500-Series manual Auto-negotiation option for Fast Ethernet copper ports

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Magnum 500-Series Switching Hubs

Installation and User Guide (08/98)

 

 

may be made for each port separately. If the Magnum 528’s Fast Ethernet copper ports are internally set for auto-negotiation (AUTO LED is ON), then the F/H switch selection has no effect. The adjacent F/H LED will indicate the full- or half-duplex operating status of the port as determined by the internal auto-negotiation logic.

4.4Auto-negotiation option for Fast Ethernet copper ports

The Magnum 528 Switching Hub’s Fast Ethernet copper ports can be set for either fixed 100Mb speed or for 10/100 speed F/H auto-negotiation per the IEEE802.3u standard. The selection is made via an internal jumper (see Section 3.4 for jumper-setting instructions ). The factory default setting is for fixed 100Mb speed.

At 100Mb-fixed speed, the user may select half- or full-duplex mode manually on each Fast Ethernet port separately. The two Full/Half duplex manual switches are located on the front panel next to their corresponding ports. See Section 4.3 above for F/H manual switch description.

One frequently-used application for the Magnum 528’s Fast Ethernet ports is to connect one of them using fiber cabling to another switching hub in the network backbone, or some other remote 100Mb device. In this case, it is desirable to operate the fiber link at 100Mb speed, and at either half- or full duplex mode depending on the capabilities of the remote device. Standard commercially-available Fast Ethernet media converters do not support auto-negotiation, and require that the switched port to which they are connected be at 100Mb fixed speed. Attachment to 10/100 auto-negotiation ports will not work properly. The Magnum 528’s Fast Ethernet ports handle this situation easily in the default setting..

When the Fast Ethernet copper ports are set in the auto-negotiation mode, the F/H manual switches have no effect. The AUTO LED will be ON. The operating speed and F/H mode of the high speed ports can change at any time to adapt to (real or imagined) changes in the network. The “10” and “100” LEDs will indicate the operating speed.

When Magnum 528’s Fast Ethernet copper ports are set for auto-negotiation and connected to an another auto-negotiating device, there are 4 different speed and F/H modes selectable depending on what the other device supports. These are: (1) 100Mb full-duplex, (2) 100Mb half-duplex, (3) 10Mb full-duplex and (4) 10Mb half-duplex.

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Contents Switching Hubs Trademarks Fax 510 Email support@garrettcom.com Contacting Garrett CommunicationsTable of Contents InstallationMagnum Specifications LEDs Power Supply InternalWarranty 100Mb/s Multi-mode Port Optical Typical WorstMagnum 528F-ST Ordering InformationMagnum Magnum 528F-SCProduct Description Magnum 500-Series Switching Hubs IntroductionInspecting the Package and Product 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 Dynamic Buffer Space Allocation Full-duplex or Half-duplex operation, auto-sensingHigh Performance Assured 100Mb performance in any network set-upExample 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 Connecting Ethernet Media Media Ieee Standard100BASE-TX connections Magnum 528 only 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 OFFSwitching Functionality Filtering and ForwardingAddress Learning Auto PWRLK/RX FDXAuto-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 TroubleshootingWhen Calling for Assistance Return Material Authorization RMA ProcedureNo Problem Found Shipping and Packaging Information Appendix B 48VDC Addendum B2.0 Magnum 508, 528 and 528F 48VDC OptionB3.0 Applications B4.0 Installation B6.0 TroubleshootingB5.0 Operation