PoE switch uplink behaviour

[Ge Qu]

Hi,

We have an uplink port went down and up itself this morning. The switch is WS-C3560-48PS-S and ios is 12.2(55)SE10. The port went down and then up is one port of the port channel. when I check the logs, i got the following:

097615: Feb  8 2018 08:40:42.068 EST: %ILPOWER-7-DETECT: Interface Fa0/48: Power Device detected: IEEE PD
097616: Feb  8 2018 08:40:42.160 EST: %ILPOWER-5-POWER_GRANTED: Interface Fa0/48: Power granted
097617: Feb  8 2018 08:40:42.521 EST: %ILPOWER-5-IEEE_DISCONNECT: Interface Fa0/48: PD removed
097618: Feb  8 2018 08:40:43.175 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/48, changed state to down
097619: Feb  8 2018 08:40:43.309 EST: %ILPOWER-7-DETECT: Interface Fa0/48: Power Device detected: IEEE PD
097620: Feb  8 2018 08:40:43.401 EST: %ILPOWER-5-POWER_GRANTED: Interface Fa0/48: Power granted
097621: Feb  8 2018 08:40:43.770 EST: %ILPOWER-5-IEEE_DISCONNECT: Interface Fa0/48: PD removed
097622: Feb  8 2018 08:40:44.181 EST: %LINK-3-UPDOWN: Interface FastEthernet0/48, changed state to down
097623: Feb  8 2018 09:22:42.089 EST: %ILPOWER-7-DETECT: Interface Fa0/48: Power Device detected: IEEE PD
097624: Feb  8 2018 09:22:42.181 EST: %ILPOWER-5-POWER_GRANTED: Interface Fa0/48: Power granted
097625: Feb  8 2018 09:22:42.542 EST: %ILPOWER-5-IEEE_DISCONNECT: Interface Fa0/48: PD removed
097626: Feb  8 2018 09:33:14.326 EST: %ILPOWER-7-DETECT: Interface Fa0/48: Power Device detected: IEEE PD
097627: Feb  8 2018 09:33:14.418 EST: %ILPOWER-5-POWER_GRANTED: Interface Fa0/48: Power granted
097628: Feb  8 2018 09:33:14.795 EST: %ILPOWER-5-IEEE_DISCONNECT: Interface Fa0/48: PD removed
097630: Feb  8 2018 09:45:20.154 EST: %LINK-3-UPDOWN: Interface FastEthernet0/48, changed state to up
097631: Feb  8 2018 09:45:22.168 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/48, changed state to up

Is this normal in a PoE switch? can someone tell me why it's happening?

if it's not normal, what i can do for trouble shooting?

Thank you.

[Reza Sharifi]

Hi,

No, this is not normal.  From the log message you posted, it appears that the switch is not giving power to the port when this happens. I would open a ticket with TAC and send them the logs for analysis.  They most likely will recommend an upgrade.  In the meantime, if you have a non-POE port open use that for your uplink.

HTH

[Ge Qu]

Can I just disable the power on that port? Would it be good while I am
waiting for an upgrade?

Thank you

[Reza Sharifi]

Yes, if you can apply it to the interface, it should work.

no power inline never

HTH