Cable length - Is this normal?

Question

Computer networks

Problems with autonegotiation when the initiating controller tries to boot the system via iSCSI from the target server, the error "auto negotiation failed"
iscsi client (hw) -> cat5e 1m -> switch -> 20m cat5e -> switch -> cat5e 1m - > iscsi target server
started looking for a problem, double-checked that cat5e was used,
decided to measure the length of the cable - clip2net.com/s/3tQCYa8
is this an acceptable measurement error or a problem in the cable?

Answer 1

Yes, the length of each segment is up to 100 meters, this is from a computer to a switch or a switch to a switch, or a cable length from port to port. Also, the cable may be incorrectly crimped, the connectors are not crimped, or the cable is poorly terminated into the connector, a burnt port, etc.
I recommend checking the errors on the ports and measuring the speed through iperf.