Cisco Systems 3750-E manual How to Clear the Switch IP Address and Configuration, Cabling Distance

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Chapter 4 Troubleshooting

How to Clear the Switch IP Address and Configuration

•If a remote device does not autonegotiate, configure the duplex settings on the two ports to match. The speed parameter can adjust itself even if the connected port does not autonegotiate.

Autonegotiation and NIC Cards

Problems sometimes occur between the switch and third-party network interface cards (NICs). By default, the switch ports and interfaces are set to autonegotiate. It is common for devices like laptops or other devices to be set to autonegotiate as well, yet sometimes autonegotation issues occur.

To troubleshoot autonegotiation problems try manually setting both sides of the connection. If this does not solve the problem, there could be a problem with the firmware or software on your NIC card. You can resolve this by upgrading the NIC card driver to the latest version available from the manufacture.

Cabling Distance

If the port statistics show excessive FCS, late-collision, or alignment errors, verify that the cable distance from the switch to the connected device meets the recommended guidelines. See the “Cable and Adapter Specifications” section on page B-5for cabling guidelines.

How to Clear the Switch IP Address and Configuration

If you have configured a new switch with a wrong IP address, or if all of the switch LEDs start blinking when you are trying to enter Express Setup mode, you can clear the IP address that is configured on the switch.

Note This procedure clears the IP address and all configuration information stored on the switch. Do not follow this procedure unless you want to completely reconfigure the switch.

Follow these steps to return your switch to the factory default settings:

1.Press and hold the Mode button (Figure 1-1 on page 1-3).

The switch LEDs begin blinking after about 2 seconds. If the switch is not configured, the LEDs above the mode button turn green. You can omit this step and run Express Setup to configure the switch.

2.Continue holding down the Mode button. The LEDs stop blinking after an additional 8 seconds, and then the switch reboots.

The switch now behaves like an unconfigured switch. You can configure the switch by using Express Setup as described in the switch getting started guide that is included with the switch.

You can also configure the switch by using the CLI setup procedure described in the Configuring the Switch with the CLI-Based Setup Program appendix.

Catalyst 3750-E and Catalyst 3560-E Switch Hardware Installation Guide

 

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Contents Text Part Number OL-9774-03 Americas HeadquartersPage N T E N T S Connecting Devices to the Ethernet Ports Wiring the DC-Input Power Source Accessing the CLI Through the Console Port C-1 Conventions AudiencePurpose Viii Related PublicationsPreface OL-9774-03 Part Number Description Switch ModelsFront Panel Description Switch Part Number Description24- and 48-Port Switch Front Panel PoE Ports 10/100/1000 Ethernet PortsCisco TwinGig Converter Module Gigabit Ethernet Module SlotsSFP Modules LEDs 24- and 48-Port Switch LEDsColor System Status System LEDMaster LED Power Supply LEDsColor RPS Status ColorPort LEDs and Modes Mode LED Port Mode DescriptionFan LED Port Mode Port LED Color Meaning Color PoE Status PoE LEDStack LED Stack LEDRear Panel Description 24- and 48-Port Switch Rear PanelStackWise Ports Catalyst 3560E-12D Switch Rear Panel48-Port Switch Power-Supply Modules Power-Supply ModulesSwitch Port PoE Port non-PoE Port Non-PoEDC-Power-Supply Module LEDs Description AC-Power-Supply Module LEDsModule LEDs Description Fan ModulesManagement Ports RPS ConnectorManagement Options Network Configurations Safety Warnings Preparing for InstallationOL-9774-03 Switch Installation Preparing for Installation Statement 371-Power Cable and AC Adapter Tools and Equipment Installation GuidelinesBox Contents Switch Stacking Guidelines Planning a Switch Stack Catalyst 3750-E SwitchesStack Cabling Configurations Example of a Stack with Full Bandwidth Connections Stack Bandwidth and Partitioning ExamplesExample of a Stack with a Failover Condition Power On Sequence for Switch StacksRack-Mounting Installing the SwitchRack-Mounting Brackets Attaching the Rack-Mount Brackets 10 Removing Screws from the Switch11 Attaching Brackets for 19-inch Racks Mounting the Switch in a Rack Mounting the Switch in a RackWall-Mounting Attaching the Brackets to the Switch for Wall-MountingMounting the Catalyst 3560E-12D Switch on a Wall Mounting the Catalyst 3560E-12SD Switch on a Wall Table- or Shelf-Mounting After Installing the SwitchConnecting to the StackWise Ports Catalyst 3750-E Switches Installing X2 Transceiver Modules and Converter Modules Installing Devices in the 10-Gigabit Ethernet SlotsModule inserted face up Module inserted face down 202046 Removing an X2 Transceiver Module or Converter Module Installing SFP ModulesInstalling an SFP Module Lower SFP modules are inverted on 24- and 48-port switches Removing an SFP Module Connecting Devices to the Ethernet PortsDevice Crossover Cable 10/100/1000 Ethernet Port ConnectionsPoE Port Connections Switch Installation Connecting Devices to the Ethernet Ports Where to Go Next OL-9774-03 Installation Overview Power Supply and Fan Module InstallationOL-9774-03 Inserting the AC-Power Supply in 24- and 48-Port Switches Installing an AC-Power SupplyAC-Power Supply with Power Cord Retainer Installing a DC-Power SupplyGrounding the Switch Preparing for InstallationStripping the Ground Wire See -9for the Catalyst 3560E-12SD ground location Inserting the DC-Power Supply in 24- and 48-Port Switches Installing the DC Power Supply in the SwitchWiring the DC-Input Power Source 12 Inserting the Fan Module in 24- and 48-Port Switches Installing a Fan Module202049 OL-9774-03 Check Switch Post Results Diagnosing Problems Check Switch Connections Check Switch LEDs Bad or Damaged Cable Ethernet and Fiber CablesPoE Connections Transceiver IssuesPort and Interface Settings Ping End Device Check Switch PerformanceSpanning Tree Loops Speed, Duplex, and AutonegotiationCabling Distance How to Clear the Switch IP Address and ConfigurationAutonegotiation and NIC Cards How to Replace a Failed Stack Member Finding the Switch Serial NumberTroubleshooting How to Replace a Failed Stack Member OL-9774-03 Environmental Ranges Physical SpecificationsPower Specifications Table A-5 OL-9774-03 Connector Specifications Connector and Cable SpecificationsGigabit Ethernet Module Interfaces 10/100/1000 PortsFigure B-4 Duplex LC Cable Connector Console Port 10/100 Ethernet Management PortGigabit Ethernet X2 Transceiver Module Cable Specifications Cable and Adapter SpecificationsModal X2 Product Wavelength Core Size Bandwidth Number Microns MHz/kmX2 Product Transmit Power Receive Power Number SFP Module Cable SpecificationsTransmit DBm Wavelength nm652 43.4 to 62 miles 1530 To 100 km 1570 1610 Four Twisted-Pair Cable PinoutsTwo Twisted-Pair Cable Pinouts Two Twisted-Pair Crossover Cable SchematicIdentifying a Crossover Cable Switch Console RJ-45-to-DB-9 Port DTEConsole Port Adapter Pinouts DeviceSwitch Console RJ-45-to-DB-25 Port DTE Accessing the CLI Through the Console Port Accessing the CLIAccessing the CLI Through Express Setup Connecting to the Console Port Entering the Initial Configuration InformationIP Settings Completing the Setup Program Line vty 0 These choices appear OL-9774-03 Numerics IN-2 IN-3 IN-4 IN-5 IN-6
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