07-28-2022 02:05 AM
We have about 120 cables connected at the end with fast-ethernet PoE devices. Since we have PoE troubles, many devices are not online / getting power. However, we want to check if there is any cable issue.
Does "test cable-diagnostic tdr" has a useful result when the end is offline / not connected at all ?
The device works on Fast-Ethernet, as I've read in TDR guide that Pair C and D is only tested when its recognized as Gigabit, is this true? When PoE is working, Pair C should give a result, shouldn't it?
When the cable is correct and PoE is working, the output should be like this or is this wrong?
Pair A Normal
Pair B Normal
Pair C Short
Pair D Short
Switches are C9200L-24P-4X
07-28-2022 03:18 PM
07-28-2022 04:30 PM - edited 07-28-2022 04:32 PM
I want to know the exact firmware version the switch is running on and the uptime (yes, it matters).
I also want to the complete output to the command "sh cable tdr interface <PORT>".
@bselcuk wrote:
The device works on Fast-Ethernet, as I've read in TDR guide that Pair C and D is only tested when its recognized as Gigabit, is this true? When PoE is working, Pair C should give a result, shouldn't it?
Unless someone is testing the wrong port or someone is using an injector.
If the port is getting power AND the TDR result is showing only Pairs A and B are "Normal", then verify that with the command "sh power inline".
07-28-2022 04:42 PM
debug ilpower powerman
share this output let see what we will get
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