Comware

Hello,

We are facing an issue where the 1920s PoE+ switches fails to give power to some specific access points and other PoE devices from other vendors (Netgear, MikroTik). The PDs will simply not power up. Are there any known compatibilty concerns specific to the 1920s switches? Is this related to PDs using different PoE modes (Alt A / B / 4-pair) and the switch not being able to serve all modes?

What has been tested:

- Different cables and surrounding hardware

- Replace the switch with a few other PoE switches like other HP, Cisco and Zyxel PoE switches of different sizes. The setup with all PDs works excellent when using an other switch.

- Replace the switch with other 1920s switches (identical) and the issue persists.

The switches involved does give out PoE on PDs of different brands like Extreme Networks. So far we suspect the issue to be related to PoE modes. All documentation mentions 802.3at or 802.3af but nothing about supported modes.

Hope to find the answer to this, cheers.

Hi,

Kindly share below commands output:
If its Procurve:
show power-overethernet
show power-overethernet brief
Or if its Comware:
display poe device
display poe interface

Also can you please check hardware limitations of the vendors which are not coming up on this switch?

Thank you for responding.

However, unlike the previous 1920 series, the 1920s series are neither Procurve or Comware - they run embedded Linux. They are also only web managed.

The units from Netgate and Mikrotik all specify 802.3af (PoE) but not the specific modes applied.

Hi,

In this case you need to log a case with support to check the limitations of the product.

Thanks!