Have not seen any answers to this but must be a question over the years.
So I have many access points powered with POE injectors and want to know (and monitor) the power being consumed by the access point to determine if there are problems with the PWRINJ or with how much the AP is requiring, which depends on antennas etc.
The AP are connected to non POE switches meaning show power inline is not helpful. But when CDP is enabled on both ends, the AP tells the switch how much power is being drawn from the PWRINJ via POE.
AREA1.SW2#show power inline
Available:0.0(w) Used:0.0(w) Remaining:0.0(w)
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
AREA1.SW2#show cdp nei gi0/9 detail
-------------------------
Device ID: AREA1.AP2.xxxx
Entry address(es):
IP address: 192.168.1.12
Platform: cisco AIR-SAP3602I-A-K9, Capabilities: Trans-Bridge Source-Route-Bridge IGMP
Interface: GigabitEthernet0/9, Port ID (outgoing port): GigabitEthernet0
Holdtime : 164 sec
Version :
Cisco IOS Software, C3600 Software (AP3G2-K9W7-M), Version 15.3(3)JD16, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2018 by Cisco Systems, Inc.
Compiled Tue 05-Jun-18 02:29 by prod_rel_team
advertisement version: 2
Duplex: full
Power drawn: 15.400 Watts
Power request id: 34554, Power management id: 1
Power request levels are:15400 13000 0 0 0
Management address(es):
IP address: 192.168.1.12
Total cdp entries displayed : 1
So i have thoroughly checked the AP and there are no commands that show power consumption. Even show tech-support has no output that determines how many watts is being consumed by the AP via POE. However, debug cdp ilp has basic information about what is being reported by the AP for CDP requests.
817725: Sep 30 10:26:25.676: CDP-ILP: sent cdp msg:power consumed pwr=15400Spare Pair turned OFF and current index 0
817726: Sep 30 10:26:25.676: CDP-ILP: sent cdp msg:power request reqid=34554 manid=1 rlevel(2)=15400 13000
817727: Sep 30 10:26:28.728: CDP-ILP: rcvd cdp msg:power available reqid=0 manid=1 alevel=0 mlevel=-1
817728: Sep 30 10:26:28.728: CDP-ILP: power state:INJECTOR_CONFIGURED_ON_SOURCE event:ZERO_PWR unchanged
Clearly the AP knows its on POE and how much power is being drawn, so why do AP's not show power consumption? Logically it should be where the non existent show env all would be located and definitely should be SNMP reportable. Are there MIB's to find out POE drawn power usage?
Any feedback or help would be great.
