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Một số thiết bị PoE dùng chuẩn 802.3af khi gắn vào switch PoE có thể rơi vào tình trạng up/down liên tục. Nếu gắn vào các module ESW hoặc các dòng switch 3850 thì chạy tốt. Cách khắc phục lỗi trên như sau.
00:12:30: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Fa0/3: Power given, but link is not up
00:15:41: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Fa0/2: Power given, but link is not up
lab-core01#conf t
Enter configuration commands, one per line. End with CNTL/Z.
lab-core01(config)#int fa0/2
lab-core01(config-if)#power inline delay shutdown 20 initial 100
lab-core01(config-if)#exit
lab-core01(config)#exit
00:15:58: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to up
00:15:59: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
HQ_SW#show power inline
Available:360(w) Used:14(w) Remaining:346(w)
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/1 auto off 0.0 n/a n/a 15.4
Fa0/2 auto on 14.4 IP Phone 9971 15.4
00:12:30: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Fa0/3: Power given, but link is not up
00:15:41: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Fa0/2: Power given, but link is not up
lab-core01#conf t
Enter configuration commands, one per line. End with CNTL/Z.
lab-core01(config)#int fa0/2
lab-core01(config-if)#power inline delay shutdown 20 initial 100
lab-core01(config-if)#exit
lab-core01(config)#exit
00:15:58: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to up
00:15:59: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
HQ_SW#show power inline
Available:360(w) Used:14(w) Remaining:346(w)
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/1 auto off 0.0 n/a n/a 15.4
Fa0/2 auto on 14.4 IP Phone 9971 15.4