Cisco Systems 520 manual Recover the Switch Software, Prerequisites

Page 84

Chapter 7 Troubleshooting the Switch

Recover the Switch Software

Recover the Switch Software

Prerequisites

•You must have physical access to the switch.

•Make sure that at least one switch port is enabled and is not connected to a device.

You might need to recover the switch software if the image is corrupted. A symptom of corrupted software is the switch continuously trying to restart.

Other reasons to recover the switch software are if you deleted the image due to a failed software upgrade and if you have forgotten the switch password.

Recovering the switch software involves deleting all switch configuration settings and returning the switch to its factory default settings. To return the switch to its factory default settings, follow these steps:

Step 1 Disconnect the power cord from the switch.

Step 2 Press the ADMIN button, and at the same time, reconnect the power cord to the switch.

Step 3 Wait until all the switch-level LEDs turn amber.

Step 4 Release the ADMIN button.

Step 5 Wait until the SYSTEM LED stops blinking green and becomes solid green. A solid green SYSTEM LED means that the switch is operating properly.

The ADMIN button should be blinking green. A blinking green ADMIN LED means that the switch does not have an IP address yet.

Step 6 Set up the switch, as described in Chapter 2, “Setting Up the Switch.” Step 7 Use the Cisco Configuration Assistant to upgrade the switch software.

	User Guide for the Catalyst Express 520 Switches
7-10	OL-12761-02

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Contents User Guide for Catalyst Express 520 Switches Page Page Page N T E N T S Installing the Switch Troubleshooting the Switch Cabling Guidelines A-10 Ethernet Port Connections A-10 Using This Guide How This Guide Is OrganizedMonitor the status and the performance of the switch Switch Documentation Set Related DocumentationXii Introduction Chapter Topics2show the switches in network examples OverviewCatalyst Express 520-8PC-K9 Catalyst Express 520-24TT-K9Catalyst Express 520-24LC-K9 Catalyst Express 520-24PC-K9Cisco Smart Business Communications System Network Example Catalyst Express Switch Network Example Hardware Features AC powerConnector Security slotSystem LED PoE LEDAdmin button Uplink portsPorts View list Software Features Device ManagerDevice Manager Interface Express Setup MonitoringSecurity Cisco Configuration Assistant Box Contents Supported HardwareHardware Requirements Software RequirementsOperating System Microsoft Internet Explorer Mozilla Firefox Setting Up the Switch Before You BeginSet Up the Switch Existing Network PrerequisitesTroubleshooting 201615 201616 Troubleshooting Set Up the Switch No Network 191685 Enter the network setting in the Express Setup window Repeat to Step Same network as the switch IP address assigned in Step Secured Sessions with the Switch When You Are DoneInstalling the Switch Cause severe bodily injury and equipment damage. Statement Statement 371-Power Cable and AC Adapter OL-12761-02 Installation Guidelines Installing the Switch Installation Guidelines Install the Switch On a Desk or Shelf Install the Switch in a Rack Prerequisite201618 Cable guide is not used with Install the Switch on a Wall To the wall as shown in Step Connecting to the Switch Cabling Guidelines Connect to an Ethernet Port Repeat to as necessaryInstall an SFP Module into an SFP Module Slot Remove an SFP Module from an SFP Module Slot Connect to a Fiber-Optic SFP Module Port Connect to a Dual-Purpose Port Either Changing the Switch Network Settings Change the Switch IP Information Change Optional Administrative SettingsMonitoring the Switch OL-12761-02 Monitoring the Switch Review the Front Panel View and the LEDs Front Panel ViewExplanation PoEAdmin Explanation StatusPort Mode Explanation Duplex SpeedSmartports Switch Dashboard Review the DashboardReview the Port Status Review the Port StatisticsReview the Alert Log Sample Alert LogMonitoring the Switch When You Are Done OL-12761-02 Troubleshooting the Switch Troubleshoot IP Address Problems Switch Has Wrong IP AddressIP Address Is Not Received from Dhcp Server Troubleshoot Displaying of the Device Manager Device Manager Does Not DisplayDevice Manager Is Not Accessible Through the Network Device Manager Is Not Operating ProperlyDevice Manager Has a Slow Response Time Troubleshoot Connections to the Switch Switch and Other Device Are Not CommunicatingCisco IP Phones Continually Disconnect Access Direct Managed Mode Restart the Switch Reset the Switch Recover a Username or Password Recover the Switch Software Troubleshoot a Failed Software Upgrade If You Need Further HelpOL-12761-02 Reference Technical Specifications Power RequirementsEnvironmental Ranges Physical Dimensions Acoustic Dimensions2Location of the Switch Serial Number Connector Specifications 10/100 and 10/100/1000 PortsFigure A-4shows the pinout for a 10/100/1000 port Appendix a Reference Connector Specifications Copper SFP Module RJ-45 Connector SFP Module PortsDual-Purpose Ports Figure A-7 10/100/1000 Port PinoutsEthernet Port Connections Small Form-Factor Pluggable Module Port ConnectionsSMF Type Cisco Part Number CSS5-CABSX-LCSC=Cable and Adapter Specifications Two Twisted-Pair Cable PinoutsFour Twisted-Pair Cable Pinouts for 1000BASE-T Ports Figure A-10Crossover Cable Figure A-12 Identifying a Crossover CableOL-12761-02 Cisco Support Resources Cisco Small and Medium-Sized Business SMB Solutions Cisco Networking Professionals ConnectionNumerics IN-2 IN-3 IN-4 IN-5 IN-6 IN-7 IN-8 IN-9 IN-10

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