02-02-2022 03:30 AM
HI All
I have 13 x C9120AXI- aps plugged into a 2960 switch (POE). I am up to maximum watts capacity.
I would like to get one more AP onboarded.
Is there a way of tweaking the APs power on the following WLC please ?
Cisco Catalyst 9800-L Wireless Controller
Thanks in Advance
17.3.3
Solved! Go to Solution.
02-02-2022 02:00 PM - edited 02-02-2022 02:03 PM
Plain 2960 only supports up to 15.4wac.
Catalyst 9k APs require, at a minimum, >25.0wac.
Anything below that and the AP will not power up.
The output from the command "sh power inline" shows the switch has ran out of PoE allowance.
There is nothing else to be done except get another switch or get a switch that is "FP" (higher PoE allowance of 750wac vs the current one of 375wac).
02-02-2022 03:44 AM - edited 02-02-2022 03:46 AM
Can you post the Cat 2960 switch port config where the AP conected ?
also post from switch -
show version
show power inline
some Syntax may help you :
02-02-2022 03:58 AM
02-02-2022 04:24 AM
what is the output :
show power inline
02-02-2022 04:27 AM
02-02-2022 04:43 AM
as per the output, as you mentioned you are out of power.
but one of the surprising was, same model AP different PoE consumption :
Gi1/0/15 auto on 30.0 C9120AXI-E 4 30.0
Gi1/0/16 auto on 15.4 C9120AXI-E 4 30.0
Gi1/0/17 auto on 15.4 C9120AXI-E 4 30.0
Do you see different config on the switch ports gi 1/0/16 and 17 compare to gi 1/0/15?
as other post given informaiton based on the AP power consumption listed in Datasheet for reference :
02-02-2022 05:05 AM
02-02-2022 07:28 AM
I don't think you want to try to tweak anything that can cause you issues latter on. Why not just buy a power injector or better yet, get another switch that you can use in the future for ap's or other PoE devices.
02-02-2022 08:42 AM
not sure what model of switch, uplift the PSU to get more device added, rather overload.
02-02-2022 04:01 AM
Hi,
these are the power consumptions guide for this AP. you have to adhere with that and do tweaks.
PoE power consumption |
2.4-GHz radio |
5-GHz radio |
Link speed |
USB |
LLDP |
||||
802.3at (PoE+) |
4x4 |
4x4 |
2.5G |
Y |
25.5W |
||||
Catalyst 9120AXI, 9120AXE, 9120AXP |
|||||||||
PoE power consumption |
2.4-GHz radio |
5-GHz radio |
Link speed |
USB |
LLDP |
||||
802.3af |
PoE |
1x1 |
1x1 |
1G |
N |
13.4W |
|||
802.3af |
PoE |
2x2 |
N |
1G |
N |
13.4W |
|||
802.3af |
PoE |
N |
2x2 |
1G |
N |
13.4W |
02-02-2022 07:47 AM
These are the flexible power options for Cat 9120 APs.
AP Model | Power source | Power Type | 2.4 GHz Radio | 5 GHz Radio | Link Speed | USB | Power Draw |
C9120AXI / C9120AXE | 802.3at | PoE+ | 4x4 | 4x4 | 2.5G | ON | 25.5W |
C9120AXI / C9120AXE | 802.3af | PoE | 1x1 | 1x1 | 1G | OFF | 13.4 W |
C9120AXI / C9120AXE | 802.3af | PoE | 2x2 | N | 1G | OFF | 13.4 W |
C9120AXI / C9120AXE | 802.3af | PoE | N | 2x2 | 1G | OFF | 13.4 W |
If possible move APs to different switch, so that you don't degrade AP performance.
If you add an extra AP, it may not get required power. You may try rebooting couple of existing APs with 30w power consumption once you add the new AP and they may come up with PoE power and the new AP gets enough power to run. Not tested, but you can try.
CJ
02-02-2022 02:00 PM - edited 02-02-2022 02:03 PM
Plain 2960 only supports up to 15.4wac.
Catalyst 9k APs require, at a minimum, >25.0wac.
Anything below that and the AP will not power up.
The output from the command "sh power inline" shows the switch has ran out of PoE allowance.
There is nothing else to be done except get another switch or get a switch that is "FP" (higher PoE allowance of 750wac vs the current one of 375wac).
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