1562i AP not detecting PoE Injector
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05-27-2020 01:59 AM - edited 07-05-2021 12:06 PM
Hi,
I've got 3x 1562i's all connected to the same SG300-10MPP Switch. All three have AIR-PWRINJ-60RGD2= installed to power them. These are also all joined to a AIR-CT5520-K9 WLC
Switch Firmware: 1.4.11.4
WLC Firmware: 8.5.120.0
The APs are booting up, not detecting that they have PoE injector, doing CDP negotiations with the sg300, and reporting that they only have medium power (as the sg300-10mpp has PoE+ not UPoE). I only managed to get medium power, as before when PoE was disabled on those switchports the APs were detecting no PoE, going into low power mode and shutting the radios off.
See a snippet from the AP Logs:
May 27 09:19:00 kernel: [*05/27/2020 09:19:00.6043] May 27 09:19:04 kernel: [*05/27/2020 09:19:04.4039] waiting for POE negotiation to complete May 27 09:19:04 kernel: [*05/27/2020 09:19:04.4039] May 27 09:19:05 brain: CDP PoE negotiation OK, Allocated power 30000 mWatt Requested power 29900 mWatt May 27 09:19:05 brain: CDP UPoE required but not supported by PSE/Switch. May 27 09:19:05 brain: Power mode: Full-Power, power_detection: DC_adapter(FALSE), 802.3AF_POE(TRUE)
I have many other 1562s on this site working as intended, but these are connected to SG350 series switches.
What can I do to resolve this? Ideally I'd like to have the APs detect the injector and think it is in full power mode. obviously with medium power the APs are working and the radios are up but this is not a perfect solution.
What I've already tried:
- Setting Power injector status to override - on boot Power status is injector - but radios are down, after CDP negotiation fails it goes into low power mode
- Setting Power injector status to installed - no change
- Setting Pre-standard 802.3af switches - no change
- Disabling CDP/LLDP on switchports - AP goes into low power mode
- Disabling CDP on APs - AP goes into low power mode
- Factory Resetting APs - no change
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Aironet Access Points
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05-27-2020 02:37 AM
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05-27-2020 03:02 AM
@cameron.barr wrote:
AIR-PWRINJ-60RGD2
Have a close look at the AIR-PWRINJ-60RGD2 and see the manufacturer. Is this made by Microsemi or Phihong USA?
If I remembered correctly, the 1560 is compatible with the ones made by Microsemi.
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05-27-2020 03:38 AM
I can note though, the injector is working - no PoE is actually being drawn from the switch (verified using show power inline consumption).
If it is a Phihong USA manufactured one - would we still see the AP not draw any power from the switch?
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05-27-2020 04:46 AM - edited 05-27-2020 04:47 AM
This is a known "bug" with the injector which the developers "don't have the time" to fix.
The Phihong-made injectors do not support CDP/LLDP.
Which is strange because Phihong website clearly have options for various injectors that support LLDP/CDP or they don't. For unknown reasons, Cisco got Phihong to supply the injectors that don't.
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05-27-2020 05:04 AM
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05-27-2020 06:02 AM
The response from TAC/developer was: It's a known "issue" and they are not in a hurry to fix it.
NOTE: Maybe someone mistakenly signed a contract with Phihong for the supply of power injectors that do not talk CDP/LLDP. Who knows.
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05-27-2020 06:15 AM
https://community.cisco.com/t5/other-wireless-mobility-subjects/power-injector-for-ap1562i/td-p/3178126/page/2
Please click Helpful if this post helped you and Select as Solution (drop down menu at top right of this reply) if this answered your query.
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05-27-2020 04:23 PM
