Dear Cisco community
We have a AP1562I-E-K9 that does not come online on a 2960X Switch. It is constantly rebooting with following line in the log:
%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/20: Power Controller reports power Imax error detected
Show power inline shows a usage of only 15.4 Watts:
swTST01#show power inline
Module Available Used Remaining
(Watts) (Watts) (Watts)
------ --------- -------- ---------
1 740.0 45.4 694.6
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/1 auto off 0.0 n/a n/a 30.0
Gi1/0/2 auto off 0.0 n/a n/a 30.0
Gi1/0/3 auto off 0.0 n/a n/a 30.0
Gi1/0/16 auto off 0.0 n/a n/a 30.0
Gi1/0/17 auto off 0.0 n/a n/a 30.0
Gi1/0/18 auto off 0.0 n/a n/a 30.0
Gi1/0/19 auto on 30.0 AIR-CAP1532I-E-K9 4 30.0
Gi1/0/20 auto on 15.4 Ieee PD 4 30.0
Gi1/0/21 auto off 0.0 n/a n/a 30.0
Gi1/0/22 auto off 0.0 n/a n/a 30.0
If i enable the following command, it comes online with 30 watts steady
swTST01(config-if)#power inline static max 30000
swTST01(config-if)#end
swTST01#show power inline
Module Available Used Remaining
(Watts) (Watts) (Watts)
------ --------- -------- ---------
1 740.0 60.0 680.0
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/1 auto off 0.0 n/a n/a 30.0
Gi1/0/2 auto off 0.0 n/a n/a 30.0
Gi1/0/3 auto off 0.0 n/a n/a 30.0
Gi1/0/16 auto off 0.0 n/a n/a 30.0
Gi1/0/17 auto off 0.0 n/a n/a 30.0
Gi1/0/18 auto off 0.0 n/a n/a 30.0
Gi1/0/19 auto on 30.0 AIR-CAP1532I-E-K9 4 30.0
Gi1/0/20 static on 30.0 AIR-AP1562I-E-K9 4 30.0
Gi1/0/21 auto off 0.0 n/a n/a 30.0
After some more digging, i read about the Cisco Bug CSCsw18530 (LINK)
There it says, i have to use power inline port 2x-mode on the interface to fix this issue. So i deconfigured the static command and put this one in. Now it says it is draining 29.9 Watts on that port.
swTST01#show power inline
Module Available Used Remaining
(Watts) (Watts) (Watts)
------ --------- -------- ---------
1 740.0 59.9 680.1
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/1 auto off 0.0 n/a n/a 30.0
Gi1/0/2 auto off 0.0 n/a n/a 30.0
Gi1/0/3 auto off 0.0 n/a n/a 30.0
Gi1/0/16 auto off 0.0 n/a n/a 30.0
Gi1/0/17 auto off 0.0 n/a n/a 30.0
Gi1/0/18 auto off 0.0 n/a n/a 30.0
Gi1/0/19 auto on 30.0 AIR-CAP1532I-E-K9 4 30.0
Gi1/0/20 auto on 29.9 AIR-AP1562I-E-K9 4 30.0
Gi1/0/21 auto off 0.0 n/a n/a 30.0
swTST01(config-if)#do show run int gi 1/0/20
Building configuration...
Current configuration : 202 bytes
!
interface GigabitEthernet1/0/20
switchport trunk native vlan 10
switchport mode trunk
power inline port 2x-mode
mls qos trust dscp
mls qos dscp-mutation IDONTCARE
end
So basically i dont understand how a Cisco access point has trouble negotiating the correct amount of power to receive by a Cisco switch. As i like to have a default configuration for all ports my question is: Which configuration is recommended to use with these access points? And does this configuration then have an impact on other access point models (that drain 15 Watts only) or non PoE devices (like PC's or printers) that might cause problems?
Thanks
