NodeNetworkTransmitErrs #

Meaning #

Network interface is reporting many transmit errors.

Impact #

Applications on the node may no longer be able to operate with other services. Network attached storage performance issues or even data loss.

Diagnosis #

Investigate networking issues on the node and to connected hardware. Check network interface saturation. Check CPU usage saturation. Check physical cables, check networking firewall rules and so on.

Mitigation #

In general mitigation landscape is quite vast, some suggestions:

• Ensure some node capacity is left unallocated (cpu/memory) for handling networking.
• Increase TX queue length
• Spread services to other nodes/pods.
• Replace physical cables, change ports.
• Look into introducting Quality of Service or other TCP congestion avoidance algorithms