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diff --git a/health/guides/wifi/wifi_inbound_packets_dropped_ratio.md b/health/guides/wifi/wifi_inbound_packets_dropped_ratio.md new file mode 100644 index 00000000..ce26c1e5 --- /dev/null +++ b/health/guides/wifi/wifi_inbound_packets_dropped_ratio.md @@ -0,0 +1,52 @@ +### Understand the alert + +This alert calculates the ratio of inbound dropped packets for a specific network interface over the last 10 minutes. If you receive this alert, it means that your WiFi network interface dropped a significant number of packets, which could be due to lack of resources or unsupported protocol. + +### What does "inbound dropped packets" mean? + +In the context of networking, "inbound dropped packets" means that packets were received by the network interface but were not processed. This can happen due to various reasons, including: + +1. Insufficient resources (e.g., CPU, memory) to handle the packet. +2. Unsupported protocol. +3. Network congestion, leading to packets being dropped. +4. Hardware or configuration issues. + +### Troubleshoot the alert + +- Check the system resource utilization + +Using the `top` command, check the resource utilization (CPU, memory, and I/O) in your system. High resource usage might indicate that your system is struggling to process the incoming packets. + +``` +top +``` + +- Inspect network configuration and hardware + +1. Check if there are any hardware issues or misconfigurations in your WiFi adapter or network interface. Refer to your hardware's documentation or manufacturer's support for troubleshooting steps. + +2. Make sure your network device drivers are up-to-date. + +- Monitor network traffic + +Use the `iftop` command to monitor network traffic on your interface. High network traffic can cause congestion, leading to dropped packets. If you don't have it installed, follow the [installation instructions](https://www.tecmint.com/iftop-linux-network-bandwidth-monitoring-tool/). + +``` +sudo iftop -i <interface_name> +``` + +- Investigate network protocols + +Inbound dropped packets may be caused by unsupported network protocols. Use the `tcpdump` command to examine network traffic for any abnormalities or unknown protocols. + +``` +sudo tcpdump -i <interface_name> +``` + +### Useful resources + +1. [Top 20 Netstat Command Examples in Linux](https://www.tecmint.com/20-netstat-commands-for-linux-network-management/) +2. [iftop command in Linux to monitor network traffic](https://www.tecmint.com/iftop-linux-network-bandwidth-monitoring-tool/) +3. [An Overview of Packet Sniffing using Tcpdump](https://www.ubuntupit.com/tcpdump-useful-unix-packet-sniffer-command/) + +Remember to replace `<interface_name>` with the actual name of the WiFi network interface causing the alert.
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