Tips for handling network link failures

Network administrators often experience network connectivity failures, and if no tools are often known to troubleshoot with the following, here are six basic steps for troubleshooting. 　　Learn how to simplify identifying, isolating, and resolving problems between edge switches and user computers by using the right tools and following 6 simple steps.

to handle network connectivity failures Step 1th: Test cable First, check the cable between the computer and the network Jack. For the 10/100 network environment, only one can check open, short circuit and wiring tools to work. For Gigabit Ethernet, it is also necessary to check whether there is crosstalk and impedance failure in the cable. 　　We recommend the use of cable identification tester, which can test crosstalk and impedance faults in a real-time network.

to handle network connectivity Failures Step 2nd: Confirm that connecting to the switch connects the Portable Network tool (not the problem computer) to the office line and checks to see if a link can be established. If the port is closed by the administrator, the tool will not be able to connect. Next, check the port configuration to ensure that the port is available and configured with the correct VLAN. For best results, you should use a tool that supports 10/100/gig connections. 　　However, typically 10/100 connected tools work.

to handle network connectivity failures Step 3rd: Request a DHCP address once you have established a link, you can use the tool to request a DHCP address from the server. You should ensure that the assigned addresses match the corresponding subnets, verify the subnet mask, and confirm the default gateway and DNS server addresses. If the tool fails to obtain a response from the server, it should be able to detect the corresponding subnet by analyzing the broadcast traffic. Through the Cisco Discovery Protocol (CDP) report obtained from the switch, check the switch ports that the tool is connected to and confirm the subnet configuration.

to handle network connectivity failures Step 4th: Ping a device on a network once you have obtained a DHCP address, you can use the tool to ping a device outside of a local area network. This confirms that the DHCP server's specified configuration is correct and that network traffic is routed correctly. At this point, the network connection has been tested, so the computer can reconnect to the network. 　　For persistent network connectivity issues, it is best to connect tools online between your computer and the network for additional diagnostics.

to handle network connectivity Failures Step 5th: Verify speed/Duplex mode setting certain link performance failures such as duplex mode mismatch, speed mismatch, and static configuration IP address can only be detected online. Therefore, we strongly recommend the use of tools with online detection capabilities. Connect tools online between your computer and your network. Verify that the speed setting and duplex mode settings for the connected switch ports match the settings of the corresponding computer. If a duplex mode mismatch is detected, verify that both the computer and the switch ports have been set to an automatic protocol.

Process a networkConnection Failure Step 6th: Network traffic monitoring the computer successfully requests and receives addresses from the DHCP server through an online tool. This tool should be able to establish a separate connection with the network and then establish a connection with the computer. Next, use your computer to connect to your e-mail server or application server, and monitor your network traffic through tools. Look for too many broadcasts, conflicts, or errors. Once all these parameters have been checked, the link between the computer and the network can be canceled. If the failure persists, you may need to use a more sophisticated network diagnostics tool.