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

[Mike_Walker2]

I will add that I am seeing the same thing with an X440-48P-10G and a Cisco 2702i AP. Everything comes up fine with .af POE but this restricts antenna usage as well as the secondary port on the AP. AP gives an error about inadequate power available from the switch.

Will try Balaji's suggestion next time I'm on site but definitely something that should 'just work' ideally.

[Balaji]

Hi,

On the extreme switch configure the following command " configure lldp transmit-interval 5"

Changing the transmit-interval to 5 secs and disabling and enabling the lldp will get the meraki work at .3at.

[bw447]

Hi Stephane, I spent about 1 hour with them connected into a machine that had a serial connection. After turning on log debugging and changing every possible setting for 802.3 we weren't able to pass more than 9 Watts. I did some packet captures during the AP boot and it shows the AP asking for 14 Watts (off the top of my head I think that's the correct amount requested). I then see the switch acknowledges it and says that it is passing 14 Watts back to the AP, but when you look at the command: 'sh inline-power info etail port it still only shows passing 8 Watts. The person at TAC was very kind and I could tell really wanted to fix the problem. He took a bunch of data from the switch and was going to pass it on to engineering. I will update the post when I get more information.

[Stephane_Grosje]

Hi,
please share the result, that could be interesting for a lot of people.

[bw447]

I had a conference call with TAC yesterday. Thanks Jason.