From 5da14042f70711ea5cf66e034699730335462f66 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 5 May 2024 14:08:03 +0200 Subject: Merging upstream version 1.45.3+dfsg. Signed-off-by: Daniel Baumann --- .../wifi/wifi_inbound_packets_dropped_ratio.md | 52 +++++++++++++++++++++ .../wifi/wifi_outbound_packets_dropped_ratio.md | 54 ++++++++++++++++++++++ 2 files changed, 106 insertions(+) create mode 100644 src/health/guides/wifi/wifi_inbound_packets_dropped_ratio.md create mode 100644 src/health/guides/wifi/wifi_outbound_packets_dropped_ratio.md (limited to 'src/health/guides/wifi') diff --git a/src/health/guides/wifi/wifi_inbound_packets_dropped_ratio.md b/src/health/guides/wifi/wifi_inbound_packets_dropped_ratio.md new file mode 100644 index 000000000..ce26c1e5e --- /dev/null +++ b/src/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 +``` + +- 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 +``` + +### 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 `` with the actual name of the WiFi network interface causing the alert. \ No newline at end of file diff --git a/src/health/guides/wifi/wifi_outbound_packets_dropped_ratio.md b/src/health/guides/wifi/wifi_outbound_packets_dropped_ratio.md new file mode 100644 index 000000000..8441885df --- /dev/null +++ b/src/health/guides/wifi/wifi_outbound_packets_dropped_ratio.md @@ -0,0 +1,54 @@ +### Understand the alert + +The `wifi_outbound_packets_dropped_ratio` alert indicates that a significant number of packets were dropped on the way to transmission over the last 10 minutes. This could be due to a lack of resources or other issues with the network interface. + +### What does dropped packets mean? + +Dropped packets refer to data packets that are discarded by a network interface instead of being transmitted through the network. This can occur for various reasons such as hardware failures, lack of resources (e.g., memory, processing power), or network congestion. + +### Troubleshoot the alert + +1. Check interface statistics + +Use the `ifconfig` command to view information about your network interfaces, including their packet drop rates. Look for the dropped packets count in the TX (transmit) section. + +```bash +ifconfig +``` + +Replace `` with the name of the network interface you are investigating, such as `wlan0` for a wireless interface. + +2. Check system logs + +System logs can provide valuable information about any potential issues. Check the logs for any errors or warnings related to the network interface or driver. + +For example, use `dmesg` command to display kernel messages: + +```bash +dmesg | grep -i "" +``` + +Replace `` with the name of the network interface you are investigating. + +3. Check for hardware issues + +Inspect the network interface for any signs of hardware failure or malfunction. This may include damaged cables, loose connections, or issues with other networking equipment (e.g. switches, routers). + +4. Monitor network congestion + +High packet drop rates can be caused by network congestion. Monitor network usage and performance using tools such as `iftop`, `nload`, or `vnstat`. Identify and address any traffic bottlenecks or excessive usage. + +5. Update network drivers + +Outdated or faulty network drivers may cause packet drop issues. Check for driver updates and install any available updates following the manufacturer's instructions. + +6. Optimize network settings + +You can adjust network settings, like buffers or queues, to mitigate dropped packets. Consult your operating system or network device documentation for specific recommendations on adjusting these settings. + +### Useful resources + +1. [ifconfig command in Linux](https://www.geeksforgeeks.org/ifconfig-command-in-linux-with-examples/) +2. [How to monitor network usage with iftop](https://www.binarytides.com/monitor-network-usage-with-iftop/) +3. [nload – Monitor Network Traffic and Bandwidth Usage in Real Time](https://www.tecmint.com/nload-monitor-linux-network-traffic-bandwidth-usage/) +4. [VNstat – A Network Traffic Monitor](https://www.tecmint.com/vnstat-monitor-network-traffic-in-linux/) \ No newline at end of file -- cgit v1.2.3