sw11# show stacking
Stack ID : 01002c59-e512c640
MAC Address : 2c59e5-12c663
Stack Topology : Ring
Stack Status : Active
Uptime : 2d 23h 35m
Software Version : WB.15.12.0010
Mbr
ID Mac Address Model Pri Status
--- ------------- -------------------------------------- --- ---------------
1 2c59e5-12c640 HP J9727A 2920-24G-PoE+ Switch 128 Standby
2 d4c9ef-aaa040 HP J9728A 2920-48G Switch 128 Commander
sw11#
The problem is that the half of the ports doesn't delivering power via POE (detection status: disabled):
sw11# show power-over-ethernet brief
Status and Counters - Port Power Status
Member 1 Power
Available: 370 W Used: 0 W Remaining: 370 W
PoE | Power Power Alloc Alloc Actual Configured Detection Power Pre-std
Port | Enable Priority By Power Power Type Status Class Detect
----- + ------ -------- ----- ----- ------ ----------- ----------- ----- ------
1/1 | Yes high value 12 W 0.0 W Disabled 0 off
1/2 | Yes critical value 12 W 0.0 W Disabled 0 off
1/3 | Yes high value 12 W 0.0 W Disabled 0 off
1/4 | Yes high value 12 W 0.0 W Disabled 0 off
1/5 | Yes high value 12 W 0.0 W Disabled 0 off
1/6 | Yes high value 12 W 0.0 W Disabled 0 off
1/7 | Yes high value 12 W 0.0 W Disabled 0 off
1/8 | Yes high value 12 W 0.0 W Disabled 0 off
1/9 | Yes high value 12 W 0.0 W Disabled 0 off
1/10 | Yes high value 12 W 0.0 W Disabled 0 off
1/11 | Yes high value 12 W 0.0 W Disabled 0 off
1/12 | Yes high value 12 W 0.0 W Disabled 0 off
1/13 | Yes low value 12 W 0.0 W Searching 0 off
1/14 | Yes low value 12 W 0.0 W Searching 0 off
1/15 | Yes low value 12 W 0.0 W Searching 0 off
1/16 | Yes low value 12 W 0.0 W Searching 0 off
1/17 | Yes low value 12 W 0.0 W Searching 0 off
1/18 | Yes low value 12 W 0.0 W Searching 0 off
1/19 | Yes low value 12 W 0.0 W Searching 0 off
1/20 | Yes low value 12 W 0.0 W Searching 0 off
1/21 | Yes low value 12 W 0.0 W Searching 0 off
1/22 | Yes low value 12 W 0.0 W Searching 0 off
1/23 | Yes low value 12 W 0.0 W Searching 0 off
1/24 | Yes low value 12 W 0.0 W Searching 0 off
I can manually put disabled ports to "searching" by executing
After that, PoE works fine on ports 1-12, but only for some time. On the next day ports 1-12 again "disabled". The question is: how to permanently turn on searching for poe devices on all ports?
Recieving same issue, expect PoE ports 2/1-2/12 will not enable. They stay in an Disabled State. Rebooting switch causes a temporary solution, then reverts. Running WB.15.17.0010 on an 3 2920 stack.
You will need to log a call if there is an actual fault.
You may be able to see somethng useful with commands like this:
show logging -r -w
- w shows the Warning arlarms (do a ? to see other options). Example below has warnings as power cables were disconnected/reconnected.
W 02/20/16 19:42:06 00576 chassis: 50V Power Supply 1 is Faulted. Failures: 2
W 02/20/16 19:42:05 00071 chassis: Power Supply failure: Supply: 1, Failures: 2
W 02/20/16 19:35:17 00071 chassis: Power Supply OK: Supply: 1, Failures: 1
W 02/20/16 19:35:17 00576 chassis: 50V Power Supply 1 is OK. Failures: 1
W 02/20/16 19:35:11 00576 chassis: 50V Power Supply 1 is Faulted. Failures: 1
W 02/20/16 19:35:11 00071 chassis: Power Supply failure: Supply: 1, Failures: 1
Also
show power-over-ethernet brief
show power-over-ethernet
show run int 1/12
Can you please tell us what was the issue. Even we are facing the same issue. Power-over-ethernet goes to disabled mode frequently. Have to enable PoE by running command "power-over-ethernet" on the disable ports. But this is a temporary solution.
I found a possible solution to this problem that I'd like to share.
The following command allows the switch to calculate power draw on actual power usage instead of the reported LLDP value: no lldp config 1-24 dot3TlvEnable poe_config
This link is a very good writeup explaining the problem.
"The following command allows the switch to calculate power draw on actual power usage instead of the reported LLDP value: no lldp config 1-24 dot3TlvEnable poe_config"This fixed a similiar issue that I started having on an 8212zl
