02-01-2023 09:25 AM
What is the best way to determine if a switch/uplink is being overwhelmed? CPU performance?
02-01-2023 09:27 AM
no drop is good indicate that there is no issue in
buffer
CPU
QoS
02-01-2023 09:41 AM
If you are looking for commands:
"sh process cpu sort | ex 0.00" will show you what is causing high CPU. Also, "sh interface x/x/x" will show you if the uplinks are loaded, and the overall status of the interface.
HTH
02-01-2023 02:11 PM
This question is very broad and I/we need to understand the context to this question.
02-01-2023 02:51 PM
For any particular port, increasing drop stats is often a great indication the port is being overwhelmed. (Also noted by @MHM Cisco World)
If CPU performance is very high to maxed out, that often indicates some issue beyond traffic volume, itself, as switches have dedicated hardware for switching.
Head-of-line blocking, or fabric blocking, can cause poor performance, but troubleshooting those is more involved than I want to delve into here, beyond . . .
Head of line blocking architectures is rare, generally, with modern switches.
Fabric blocking happens when the aggregate volume of traffic, across multiple switch ports, exceeds the fabric's bandwidth capacity. Most modern Enterprise grade switch fabrics have sufficient bandwidth for all ports to operate at full capacity, concurrently.
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