x460 and x440 Not Passing the correct amount of power of PoE+

[bw447]

I've been running into a lot of problems with poe devices that are class4 and require PoE+. I have VoIP phones and Wireless AP (802.11AC) that aren't getting the correct amount of power. I have lldp enabled on the port with the AP (enable lldp port 1:3). Is there any known issues with PoE+ that anyone has seen? I fixed (at least I believe it has been fixed) our phone issue by telling the phones (cisco) to not use power negotiation. However I can't do it with the APs (Meraki MR34). Slot-1 is x460 Slot-2 and 3 are both x440 Slot-1 DemoStack.3 # sho version Slot-1 : 800324-00-12 1339N-44663 Rev 12.0 BootROM: 2.0.1.7 IMG: 15.4.1.3 Slot-2 : 800474-00-10 1343N-42635 Rev 10.0 BootROM: 2.0.1.7 IMG: 15.4.1.3 Slot-3 : 800474-00-11 1350N-40109 Rev 11.0 BootROM: 2.0.2.1 IMG: 15.4.1.3 Slot-4 : Slot-5 : Slot-6 : Slot-7 : Slot-8 : SS-B-1 : 800384-00-01 1327N-40559 Rev 1.0 Slot: Slot-1 * Slot-2 ------------------------ ------------------------ Current State: MASTER BACKUP (In Sync) Image Selected: primary primary Image Booted: primary primary Primary ver: 15.4.1.3 15.4.1.3 patch1-10 patch1-10 Secondary ver: 15.3.2.11 15.3.2.11 Config Selected: primary.cfg Config Booted: primary.cfg

[Ryan_Mathews]

Just connecting dots between KB and the Community for those that read this in the future.

https://gtacknowledge.extremenetworks.com/articles/Solution/Cisco-Meraki-MR34-device-not-powering-up...

[Matt_Hill]

I'll second Mike's issue. I'm experiencing the same with a 2702i and an X440-48P. The suggestion to change the LLDP interval to 5 seconds hasn't resolved the issue.

Has anyone had any luck getting this to work?

[Matt_Hill]

The only progress I've made so far is this:

Based on the suggestion of a TAC Engineer, run the following command to enable class 4 power negation via LLDP -

#configure lldp ports [port] advertise vendor-specific dot3 power-via-mdi with-classification

#enable lldp ports [port]

At this point the AP registered to our controller still reports PoE Status as Medium Power (15.4W) under the advanced tab of the specific AP.

Disabling CDP under the AP settings and rebooting the AP will then display a PoE status of Full Power. The switch at this point will show higher wattage than it had before (I've had up to 8.4W today, vs mid-6W range earlier), but it's still not what I was expecting to see. Cisco's Prime Infrastructure monitoring still reports that the AP is drawing low power.

It still doesn't feel like the AP is getting the power it's requesting, but maybe a step in the right direction.

[Mike_Walker2]

I also implemented many of the suggestions in this thread with no success. The switch is reporting Class 4 POE on the port but neither the AP nor a Fluke LinkRunner AT 2000 reports appropriate POE actually being delivered (LinkRunner AT reports class 0 and IIRC 9W or so and states that LLDP negotiation of higher power is not possible).

Have been sticking my neck out recommending Extreme over Cisco for switches on projects but basic incompatibilities such as this are making it not worth the risk...