From be1c7e50e1e8809ea56f2c9d472eccd8ffd73a97 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 04:57:58 +0200 Subject: Adding upstream version 1.44.3. Signed-off-by: Daniel Baumann --- health/guides/net/inbound_packets_dropped.md | 58 ++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 health/guides/net/inbound_packets_dropped.md (limited to 'health/guides/net/inbound_packets_dropped.md') diff --git a/health/guides/net/inbound_packets_dropped.md b/health/guides/net/inbound_packets_dropped.md new file mode 100644 index 00000000..e2519630 --- /dev/null +++ b/health/guides/net/inbound_packets_dropped.md @@ -0,0 +1,58 @@ +### Understand the alert + +This alert is triggered when the number of inbound dropped packets for a network interface exceeds a specified threshold during the last 10 minutes. A dropped packet means that the network device could not process the packet, hence it was discarded. + +### What are the common causes of dropped packets? + +1. Network Congestion: When the network traffic is too high, the buffer may overflow before the device can process the packets, causing some packets to be dropped. +2. Link Layer Errors: Packets can be dropped due to errors in the link layer causing frames to be corrupted. +3. Insufficient Resources: The network interface may fail to process incoming packets due to a lack of memory or CPU resources. + +### Troubleshoot the alert + +1. Check the overall system resources + + Run the `vmstat` command to get a report about your system statistics. + + ``` + vmstat 1 + ``` + + Check if the CPU or memory usage is high. If either is near full utilization, consider upgrading system resources or managing the load more efficiently. + +2. Check network interface statistics + + Run the `ifconfig` command to get more information on the network interface. + + ``` + ifconfig + ``` + + Look for the `RX dropped` field to confirm the number of dropped packets. + +3. Monitor network traffic + + Use `iftop` or `nload` to monitor the network traffic in real time. If you don't have these tools, install them: + + ``` + sudo apt install iftop nload + ``` + + ``` + iftop -i + nload + ``` + + Identify if there is unusually high traffic on the network interface. + +4. Check logs for any related errors + + Check the system logs for any errors related to the network interface or driver: + + ``` + sudo dmesg | grep -i "eth0" + sudo journalctl -u networking.service + ``` + + If you find any errors, you can research the specific problem and apply the necessary fixes. + -- cgit v1.2.3