Cisco Systems 520 Troubleshoot IP Address Problems, IP Address Is Not Received from Dhcp Server

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Chapter 7 Troubleshooting the Switch

Troubleshoot IP Address Problems

•Restart the Switch, page 7-7

•Reset the Switch, page 7-8

•Recover a Username or Password, page 7-9

•Recover the Switch Software, page 7-10

•Troubleshoot a Failed Software Upgrade, page 7-11

•If You Need Further Help, page 7-11

Troubleshoot IP Address Problems

Here are some basic troubleshooting for problems related to the switch IP address.

•IP Address Is Not Received from DHCP Server, page 7-2

•Switch Has Wrong IP Address, page 7-2

IP Address Is Not Received from DHCP Server

If the switch does not receive an IP address from an upstream device operating as a DHCP server, make sure that the upstream device is operating as a DHCP server and again follow the procedures in the “Set Up the Switch (Existing Network)” section on page 2-2.

Switch Has Wrong IP Address

If the switch is installed in your network but you cannot access the switch because it has the wrong IP address, assign a new switch IP address. To do this, follow the procedure in the “Access Direct Managed Mode” section on page 7-6, and then update the switch IP address on the device manager Express Setup window. You also can change the switch IP address through the Cisco Configuration Assistant.

	User Guide for the Catalyst Express 520 Switches
7-2	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 LEDUplink ports Admin buttonPorts View list Software Features Device ManagerDevice Manager Interface Monitoring Express SetupSecurity 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 StatusSpeed Port Mode Explanation DuplexSmartports 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 Switch Has Wrong IP Address Troubleshoot IP Address ProblemsIP Address Is Not Received from Dhcp Server Troubleshoot Displaying of the Device Manager Device Manager Does Not DisplayDevice Manager Is Not Operating Properly Device Manager Is Not Accessible Through the NetworkDevice Manager Has a Slow Response Time Switch and Other Device Are Not Communicating Troubleshoot Connections to the SwitchCisco 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 Power Requirements Technical SpecificationsEnvironmental 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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