HP J3178A manual Testing the Switch’s Ports and the Links

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Troubleshooting

Diagnostic Tests

Testing the Switch’s Ports and the Links

To test the switch’s ports and the attached network links, follow these procedures:

1.Check for link beat detection on the port. When the switch first detects the link beat signal (also called “link test pulse signal”) coming from an active device, the port LED comes ON for approximately 3 seconds. This happens whenever the switch is powered on and an active device that is sending link beat is connected to the port, or the connected device is powered on, or the switch is powered on and an active network cable is plugged in to the port.

In its default configuration, the switch indicates the link status for 3 seconds on its 10 Mbit/s port LEDs and then converts them to displaying network activity on the port. (The 100 Mbit/s port always operate this way.) You can configure the 10 Mbit/s port LEDs to continuously indicate the link status and not convert to activity indicators. This configuration option is on the System configuration screen under the Configuration menu on the switch console interface. See “System Configuration” in chapter 4, “Configuring the Switch From the Console”.

2.Run network communication tests. Use these tests if you have link beat detected for a port. Choose one of the following ways to run a test of the network communication between the switch and an addressable device connected at the remote end of each of the cables you wish to test:

•Select Link Test from HP AdvanceStack Assistant’s Network Test function or the switch console’s Advanced Commands option. This causes the switch to send IEEE 802.2 Test command packets to a specified network device.

The device must be able to send an IEEE 802.2 Test response packet upon receipt of a Test command packet. Usually this would be another network device such as a hub, switch, or router. You specify the remote device by its 12-digit hexadecimal MAC address.

•Select Ping Test. This is a network layer test that you can run on TCP/ IP networks. The switch sends ICMP Echo Request packets to a specified network device. This works with devices that have an IP address and are able to respond to an ICMP Echo Request packet. Most end nodes using IP will respond to this packet. You specify the remote device by its IP address.

Troubleshooting

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Contents HP AdvanceStack Switch 208/224 Management Module Page Installation and Reference Guide HP AdvanceStack Switch 208/224 Management ModulePublication Number How to get the latest software/agent firmware HP Customer Support ServicesHP FTP Library Service World Wide WebHP First Fax Retrieval Service Additional HP Support ServicesLocation Phone Number Contents Monitoring Switch Operation From the Console Spanning Tree Operation Viii Installing the Management Module Installing the Management ModuleAnti-Static Precautions Installation StepsInstalling Installing the Management Module Included PartsRemove the cover plate Removing the Module At Power OnOverview Management Module DescriptionManagement Module Description Management Module DescriptionModule Features Page T e Switch ConsoleSwitch Console Connecting a Console to the SwitchConnecting a PC or Terminal to the Console RS-232 Port Remote Console Connection Using a Modem and a PC Modem Cable Pin-Out Starting and Ending a Console Session How To Start a Console SessionMain Menu How To End a Console SessionMain Menu Features Actions line Screen Structure and NavigationTaskActions How To Navigate in the ConsoleLevel Actions Permitted Using Password SecurityTo set Manager and Operator passwords Capabilities, also set an Operator passwordTo Recover from a Lost Manager Password To Delete Password ProtectionSelect Delete Password Protection To Recover from a Lost Operator PasswordReboot Switch Option in the Main Menu Switch Console Rebooting the SwitchExample of a Configuration Change Requiring a Reboot How To Use the Advanced Commands Advanced CommandsHow To Exit from the command prompt Listing of Commands Available under Advanced CommandsPage Configuring the Switch From the Console Configuring the Switch From the ConsoleDefault values are shown in brackets ConfiguringHow To Access the Switch Configuration Configurable FeaturesConfiguring Configuring the Switch From the Console System ConfigurationExample of the Port Configuration Screen Port ConfigurationIPX Service Configuring the Switch From the Console Internet IP Service Using Bootp To manually configure the switch for IPTo configure the switch for Bootp Bootp Operation Where Snmp Communities How To Configure the Switch for Snmp CommunitiesSnmp Communities Add or Edit Screen Trap Receivers 10. The Serial Link Configuration Screen Default Values Serial Link Configuration11. The Console Configuration Screen Default Values Console ConfigurationPress the Space bar to select Yes . This enables STP Spanning Tree Configuration12. Example of the STP Configuration Screen Network Monitoring Port 13. The Default Network Monitoring Configuration Screen14. Example of Selecting a Monitoring Port Saving Configurations Page Main Menu Data Type Purpose Monitoring Switch Operation From the ConsoleMonitoring Switch Operation From the Console Status and Counters MenuMonitoring Example of Switch Information Switch InformationExample of Port Status Port StatusExample of Port Counters Port CountersExample of Port Counters Show Details Port Counters Show DetailsExample of the Address Table Address TableTo use the port address table Port Address TableExample of a Port Address Table for a Specific Port Example of Spanning Tree Information Spanning Tree STP InformationOperation and read the Ieee 802.1d standards document 10. Example of STP Port InformationSeverity Date Time System Module Event LogKey Action Event Log Control KeysSwitch Console Using Snmp To Monitor and Manage the Switch HP Proprietary MIBs include Snmp Management FeaturesSnmp Configuration Process Rmon Advanced Management Rmon Ease SupportTroubleshooting Troubleshooting Checking the Module LEDsStatus Description Problem Solution Problem/Solution TableIP Configuration Errors Diagnostic TestsTesting the Switch and Management Module Testing the Switch’s Ports and the Links Troubleshooting Resetting the Switch T e Clearing Passwords on the Switch ConsoleHP BBS Page Environmental SpecificationsSupported Mibs SpecificationsVcci Class 1 For Japan Only Regulatory StatementsPage Modem Configuration At the switchEnd At the user end Modem ConfigurationDownloading an Operating System File TransfersFile Transfers Using Tftp To Download the OS FileWriting System Software to FLASH, Back Soon Using the Switch-to-Switch Download Using the SNMP-Based HP Download ManagerJumping to console code Using the Zmodem to Download the OS FileFigure C-3. Example of Message for Download Failure Troubleshooting Tftp DownloadsFile to be copied Command Function Transferring Switch ConfigurationsConfiguration Zput config remotefile overwrite dos/unix Spanning Tree Protocol STP Spanning Tree OperationSpanning Tree Operation Clear button description … IndexDefaultconfig IP/IPX MIB STP Tftp Page 5966-5228