In a production environment, common fault types include but are not limited to the following:
Network failure , server failure , database failure , software error , security breach or attack , storage failure , configuration error , third-party service failure .
Today I will talk about how to deal with network failures .
Troubleshooting and repairing network faults
1. How to find network faults ?
Connection status: Observe the connection status indicators of the server or network device to ensure that the physical connection between the network device and the server is normal. If the connection status light is off or blinking abnormally, it may indicate a physical connection problem.
Ping test: Use the ping command to send network packets to other devices to check whether normal network communication with the target device is possible. If the ping command times out or returns an error, it may indicate a network connection problem.
Traffic monitoring: use network traffic monitoring tools, such as Wireshark, ntop, etc., to observe the situation of network traffic. You can check whether there are abnormal data packets, data packet loss, traffic congestion, etc.
Network delay test: use network delay test tools, such as ping, traceroute, MTR, etc., to check the network delay. High latency may indicate a problem with your network connection.
Log analysis: Examine the log files of servers and network devices for any errors or abnormal records related to network connections. Log files can provide useful information about network failures.
2. How to troubleshoot network faults
Check Physical Connections: Make sure all network devices and physical connections to the server are plugged in correctly and that the connecting cables are not damaged or loose.
Restart network devices: Try restarting network devices such as routers, switches, modems, etc. to resolve possible temporary problems.
Check network configuration: Check the network configuration of network devices and servers, including IP address, subnet mask, gateway, etc., to ensure they are configured correctly.
Verify DNS settings: Confirm that the DNS settings are correct. You can verify whether the DNS resolution is normal by pinging the domain name or directly accessing the IP address.
Check firewall settings: Check firewall rules and configurations to make sure normal network traffic is not being blocked.
Test other devices: Determine whether the problem is with the entire network or specific devices by trying to connect to other devices or visit other websites.
3. How to solve the network failure ?
Repair the physical connection problem: plug and unplug the connection cable again, replace the damaged connection cable, and ensure that the physical connection is normal.
Restart network devices: Try restarting network devices such as routers and switches to resolve possible temporary problems.
Check network configuration: Check the network configuration of network devices and servers to ensure it matches the network requirements and topology.
Contact your network service provider: If the problem is beyond your control, you may need to contact your network service provider.