Black Box LGB2118A manual Troubleshooting Resolving a No Link Condition, Questions and Answers

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Chapter 6: Troubleshooting

6. Troubleshooting

6.1 Resolving a No Link Condition

There are four possible causes for a no-link LED status:

The attached device is not powered on.

The cable may not be the correct type or is faulty.

The installed building premise cable is faulty.

The port may be faulty.

6.2 Questions and Answers

1. Computer A can connect to Computer B, but cannot connect to Computer C through the Gigabit Smart Switch Eco Fanless.

The network device of Computer C may fail to work. Check the link/act status of Computer C on the LED indicator. Try another network device on this connection.

The network configuration of Computer C may have something wrong. Verify the network configuration on Computer C.

2. The uplink connection function fails to work.

Check if connection ports are used on the Gigabit Smart Switch Eco Fanless.

Check the uplink setup of the Gigabit Smart Switch Eco Fanless to verify the uplink function is enabled. 3. The console interface doesn’t appear on the console port connection.

The Gigabit Smart Switch Eco Fanless has no console port, so you cannot use the console interface to connect with the Gigabit Smart Switch Eco Fanless.

4. How do I configure the Gigabit Smart Switch Eco Fanless?

You can configure the switch via an Internet Explorer® (IE) Web browser interface. First, choose any port in the Gigabit Smart Switch Eco Fanless. Then, use IE and type default IP address, 192.168.1.1, to connect to a Gigabit Ethernet with a RJ-45 network line. The login screen will appear.

4.3 Contacting Black Box

If you determine that your Gigabit Smart Switch Eco Fanless is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box Technical Support at 724-746-5500 or info@blackbox.com.

Before you do, make a record of the history of the problem. We will be able to provide more efficient and accurate assistance if you have a complete description, including:

the nature and duration of the problem.

when the problem occurs.

the components involved in the problem.

any particular application that, when used, appears to create the problem or make it worse.

4.4 Shipping and Packaging

If you need to transport or ship your Gigabit Smart Switch Eco Fanless:

Package it carefully. We recommend that you use the original container.

If you are returning the unit, make sure you include everything you received with it. Before you ship for return or repair, contact Black Box to get a Return Authorization (RA) number.

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724-746-5500 blackbox.com

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Contents Supports http and Snmp interface for switch management Trademarks Used in this Manual Trademarks Used in this ManualFCC and IC RFI Statements NOM Statement Table of Contents Table of Contents Specifications Specifications GeneralManagement Software Specifications Vlan Supports Port-based Vlan and Tag-based Ieee 802.1Q VlanFeatures OverviewOverview Introduction What’s Included LGB2118A components Not shown in -1 or2 24-Port Gigabit Smart Switch Eco Fanless LGB2124A LGB2118A LED functionsLGB2124A components Not shown in -3 or LGB2124A LED functionsOptional Modules for LGB2118A and LGB2124A Front view of 1000BASE-SX/LX LC, SFP Fiber TransceiverInstallation Installation Starting Up the SwitchHardware and Cable Installation Cabling Requirements Fiber supported by the switch 100BASE-TX TPVlan Attribute-based Vlan diagram Installation Login screen for the Web Address AssignmentInstallation Prefix Length Typical Applications Gigabit Smart Switch Copper cables Fiber cable RJ-45Media ConverterCopper cables RJ-45 Gigabit Smart Switch Copper cables RJ-45 FinancialBasic Concepts and Management Basic Concepts and ManagementEthernet Logical Link Control LLC MAC sub layer in physical layer in OSI modelMedia Access Control MAC MAC Addressing Ssap address field OptionsEthernet Frame Format 0x0835 0x8137Gigabit Ethernet Frame Ethernet parameters for half-duplex mode Flow ControlBasic Concepts and Management Collision Basic Concepts and Management How Does a Switch Work? Virtual LAN Ethernet switch MiniMini Computer frame Ethernet switch Printer WorkstationsEthernet switch Router 1a2aBasic Concepts and Management VID Link Aggregation LGB2118A Only Basic Concepts and Management Operation of Web-based Management Operation of Web-based ManagementWeb Management Home Overview Main menu function tree for Web interface Configuration System InformationOperation of Web-based Management Port Configuration Operation of Web-based Management Vlan Mode Configuration Vlan Group ConfigurationFunction name Vlan Mode Setting Media supportedTag-VLAN Mode 10. Port-Based Vlan Configuration Vlan Port Isolation Configuration Function name Port Isolation ConfigurationAggregation LGB2118A Only Mirroring Configuration Function name Igmp Snooping ConfigurationIgmp Snooping 15. Mirror ports configuration SnmpOperation of Web-based Management Loop Detection Broadcast Storm Protection Operation of Web-based Management Quality of Service QoS Configuration Operation of Web-based Management Monitoring Statistics OverviewDetailed Statistics Operation of Web-based Management Igmp Status Ping Status Maintenance Warm RestartFactory Default Software UpgradeConfiguration File Transfer Logout Troubleshooting Troubleshooting Resolving a No Link ConditionQuestions and Answers Contacting Black BoxAppendix MIB Specifications Appendix MIB SpecificationsBlackbox.com Blackbox.com Black Box Tech Support FREE! Live /7