Hello
I have hundreds of switches all running the same base config and we have hundreds of Nortel VoIP phones 1120E model phones. Other than having to use LLDP we didn't have any problems until around January. When we would introduce a new phone we would see the following on the Cisco 3850 switches
Jun 19 10:10:05 AKST: %ILPOWER-5-DETECT: Interface Gi1/0/1: Power Device detected: IEEE PD
Jun 19 10:10:28 AKST: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
Jun 19 10:10:29 AKST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up
Jun 19 10:10:37 AKST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to down
Jun 19 10:10:38 AKST: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down
Jun 19 10:11:22 AKST: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
Jun 19 10:11:23 AKST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up
Jun 19 10:11:35 AKST: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi1/0/1: PD removed
Jun 19 10:11:35 AKST: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/1: Power given, but State Machine Power Good wait timer timed out
Jun 19 10:11:45 AKST: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi1/0/1: PD removed
The phone would come up, the display lights up and it stays up for between 2 second and 10 seconds and then drops again but never comes up in a stable fashion.
If I reboot the switch the problem is gone. if I plug 2 new phones in they will fail to come up properly but once the switch reboots they come up fine and stay up.
I tried this on a 3560 8 and 12 port and the problem did not exist. It only seems to happen on some of the 3850s. The one in my building I can boot phones off it all day without an issue. I have compared the configs and don't see a difference that would cause this. I have compared the port settings and they are identical.
The only commonality I have found is that if it works on 1 port it will work on all ports, if it doesnt work on 1 port it wont work on any port.
Model
WS-C3850-48P
iOS Version
16.12.3
BUNDLE mode install
