Canton 3C16476CS Supplying Power to the Switch, Placing Units On Top of Each Other, Color State

Page 16

16CHAPTER 2: INSTALLING THE SWITCH

Placing Units On Top of Each Other

If the Switch units are free-standing, up to four units can be placed one on top of the other. If you are mixing a variety of Baseline and SuperStack units, the smaller units must be positioned at the top.

If you are placing Switch units one on top of the other, you must use the self-adhesive rubber pads supplied. Apply the pads to the underside of each Switch, sticking one in the marked area at each cor- ner. Place the Switch units on top of each other, ensuring that the pads of the upper unit line up with the recesses of the lower unit.

Supplying Power to the Switch

Power problems can be the cause of serious failures and downtime in your network. Ensure that the power input to your system is clean and free from sags and surges to avoid unforeseen network out- ages. 3Com recommends that you install power con- ditioning, especially in areas prone to black outs, power dips and electrical storms.

The unit is intended to be grounded. Ensure it is con- nected to earth ground during normal use. Installing proper grounding helps to avoid damage from light- ning and power surges.

Before powering on the Switch, verify that network cables and the power cable are securely connected.

CAUTION: The Switch has no ON/OFF switch; the only method of connecting or disconnecting main

power is by connecting or disconnecting the power cord.

To power on the Switch:

1Plug the power cord into the power socket on the rear panel of the Switch. Refer to “(7) Power Supply” on page 12 for more information.

2Plug the other end of the power cord into a power outlet.

When the Switch is powered on, the Power LED lights up. If the Power LED does not light up, refer to “(5) Power LED” on page 12 for more information.

Checking for Correct Operation

After you power on the Switch, it automatically per- forms a power-on self-test (POST). During POST, the Power LED on the front panel of the Switch flashes green.

When POST is complete, the Power LED turns green. If the Power LED turns yellow after POST, it means that POST failed.

Table 8 summarizes the possible colors for the Power LED after POST.

Table 8 Possible Power LED Colors After POST

Color State

Green	The unit is powered on and ready for use

Image 16

Contents Baseline Switch 2250 Plus 3C16476CSRegulated Materials Statement End of Life StatementEnvironmental Statement about the Documentation Contents Safety Information Icon Description ConventionsConvention Description Related Documentation Documentation CommentsOverview of the Baseline Switch 2250 Plus Features and CapabilitiesAutosensing of MDI/MDIX Connections Autonegotiating 10/100 Mbps PortsSFP Ports Traffic PrioritizationForwarding of Bpdu Packets Priority LevelFront Panel Physical Features48 RJ-45 Ports Link/Activity LEDs 10/100/1000BASE-T/SFP PortsStatusMeaning Module Active LEDs Status MeaningPackage Contents Positioning the Switch Before You BeginUsing the Mounting Kit Aufstellen des SwitchRack-Mounting or Free-Standing Montagesatz Anweisungen Inserting the ScrewsSupplying Power to the Switch Placing Units On Top of Each OtherChecking for Correct Operation Color StateConnecting a Network Device Connecting Devices to the SwitchApproved SFP Transceivers Using SFP TransceiversInserting an SFP Transceiver Removing an SFP Transceiver Performing Spot ChecksVerify That Installing the Switch Requirements for Accessing the Web Interface Running the Discovery ApplicationWelcome screen of Discovery appears Navigating the Web Interface Logging On to the Web InterfaceMenu Lists the available items on the menu Menu Item DescriptionButtons Navigating the Web InterfaceDhcp Assigned IP Address Accessing the Interface Without Using DiscoveryManually Assigned Static IP Address Device Summary Information Configuration OverviewDevice View Polling Interval Color KeyModifying the IP Address Settings Administration SettingsAutomatic IP Configuration Backup Configuration IP SetupRestore Configuration Firmware Upgrade InitializeSystem Access RebootUser Summary Modify User Create UserRemove User Setup System TimeSummary Snmp AddConfiguring VLANs Snmp RemoveVlan Modify VlanModify Port Modify Vlan ScreenRename RemovePort Detail Forwarding Tagged/Untagged FramesVlan Detail Setting Up Two VLANs on the Same Switch Sample Vlan ConfigurationsSetting Up Vlan Across Two Switches Tagged Vlan Configuration Spanning TreeIgmp Snooping Igmp QueryAdministration Configuring Port SettingsBroadcast Storm Port Administration Summary Screen DetailSpeed/Duplex for 1000 Mbps Connections Link AggregationGuidelines for Creating Trunks CreateSpanning Tree per Port ModifySpanning Tree Summary Screen Port Mirroring Spanning Tree Detail ScreenQoS VoIP Traffic Settings Port Mirroring ScreenPort Setup QoS VoIP Setup ScreenOUI Summary OUI ModifySecurity ConfigureRadius Client 802.1X Settings Radius Client Configure Screen802.1X Setup Screen Monitoring Cable DiagnosticsAddress Table Diagnostics Cable Diagnostic ScreenConfiguring the Switch Resetting to Factory Defaults Forgotten PasswordSolving LED Issues Forgotten Static IP AddressFiber cable is connected, but the Module Active LED is off Link/Activity LED is on, but network perfor- mance is poorIf the Problem Persists All ports appear to show continual activityTroubleshooting Troubleshoot Online Access Software Downloads Purchase Value-Added ServicesRegister Your Product Telephone Technical Support and Repair Contact UsCountry Telephone Number CountryUS and Canada Telephone Technical Support and Repair Safety Information Important Safety InformationAppendix B Safety Information Related Standards EnvironmentalPhysical ElectricalAppendix C Technical Information 1000BASE-T AutonegotiationBandwidth Category 3 cableCategory 5e cables Category 6 cableClient EthernetIeee 802.1p Ieee 802.3adIP Address LayerSwitch NetworkPing ProtocolTraffic monitoring TrunkingGlossary Index Index Regulatory Notices