PoE is enabled and port has link, power should not be 0

[espen]

Our brand new WS-24-400A taken to 1.3.7 is reporting this on all PoE ports (13 x 24V and 2 x 48V):

switch[791]: Port n: PoE is enabled and port has link, power should not be 0

As the message suggest power does flow and the devices are all up, so the main issue is the alert and that no watts are reported for the port status.

Firmware bug or something more problematic?

[sirhc]

Our brand new WS-24-400A taken to 1.3.7 is reporting this on all PoE ports (13 x 24V and 2 x 48V):

switch[791]: Port n: PoE is enabled and port has link, power should not be 0

As the message suggest power does flow and the devices are all up, so the main issue is the alert and that no watts are reported for the port status.

Firmware bug or something more problematic?

Please power cycle the unit, if that does not clear this issue let me know.

[espen]

Not change, but some information at the top of the log I hadn't spotted before:
Nov 21 14:19:57 switch[834]: Detected cold boot
Nov 21 14:20:01 switch[789]: 48V is out of range (-0.7V)
Nov 21 14:20:01 switch[789]: 24V is out of range (-0.7V)
Nov 21 14:20:01 switch[789]: 24V (Ports 13-24) is out of range (-0.7V)
Nov 21 14:20:01 switch[789]: 3V is out of range (0.0V)
Nov 21 14:20:07 switch[789]: Port 1: PoE is enabled and port has link, power should not be 0
etc.

[sirhc]

Please up grade to v1.3.8 and if that condition is still present then send an email to chris@netonix.com requesting and RMA.

[espen]

Took the opportunity to update to v1.3.8, with no change I'm afraid :-(

Will be in touch about RMA

[espen]

We've just swapped this switch out in preparation for RMA and the 2nd unit is displaying the same symptoms!? Could this still be a software problem? I note that the total power bar displayed under the switch layout appears to be displaying the sum of the watts not listed below (ie. adding and removing devices affects the total even if individual ports are listed as 0.0W).

[Dave]

espen

We've just swapped this switch out in preparation for RMA and the 2nd unit is displaying the same symptoms!? Could this still be a software problem? I note that the total power bar displayed under the switch layout appears to be displaying the sum of the watts not listed below (ie. adding and removing devices affects the total even if individual ports are listed as 0.0W).

Yes, kinda doubtful two units both have the same hardware issue. Will send you a PM so we can take this offline & try & figure out whats going on.

Dave

[espen]

This has turned out to be an SFP issue, the 3com 3CSFP91 triggers these power draw errors when plugged in to port 25 or 26 (only; in ports 21-24 no errors occur).

[sirhc]

This has turned out to be an SFP issue, the 3com 3CSFP91 triggers these power draw errors when plugged in to port 25 or 26 (only; in ports 21-24 no errors occur).

There are some SFP modules that will not work with our switches but I asked Eric to order in 1 of these to see if we can correct this.

Thank you for reporting back your findings.

[Eric Stern]

I finally got one of these 3com 3CSFP91 modules in last week. It worked properly in every switch and every configuration I could think of.

Maybe try again? If you still have the problem try to describe how you are testing it, maybe things have to be done in a specific order to the cause the problem and I'm doing it differently.