Let’s say you have evidence of network errors. Here’s the symptoms that you see:
1. A lot of TCP retransmits (layer4)
2. No Ethernet frame errors, dropped packets, or CRC errors (layer 2)
3. No ICMP errors, or IP level errors. Pings report no lag or dropped packets. (layer 3)
4. Failures are only reported on two nodes in your network, but no errors on the switch between the two nodes.
Given the above evidence, would you look at the wiring between the two nodes, including the patch panel ports? If so, why?
No wrong answers, just trying to bring about an open discussion of opinions.