So Leo asked me to take a look at this thread. I also have never used these micro switches.
Agreed that according to the data sheet, Table 8, it should work. That implies that it should be able to work with 30W POE+ alone and still have 7W of passthrough POE power to spare - implying that it consumes 23W.
TAC lab repro usually takes 2 weeks (at best and just with IOL) these days - more like 4-6 weeks in most cases so if it was quicker than that I'd be suspicious too. Anything requiring hardware will usually be more like 6 weeks unless by some stroke of luck they happen to already have the right piece of kit there already.
So moving on to the installation guide:
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst_microswitches/hardware/install/b-micro-hig/m-micro-product-overview.html
Table 3 there looks a bit different to the one in the data sheet!
That shows it only working with 60W or 90W PD power. With 60W PD power it says 29W of POE passthrough power available which implies the unit is consuming 31W of the power itself which means it would not work on POE+!
Also https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst_microswitches/software/releases/15_2_8_e/configuration_guide/int_hw/b_1528e_int_and_hw_cms_cg/configuring_poe.html says "The device supports powering from uplink connected to IEEE 802.3bt Type 4."
Table 2. PoE Budget
| PoE Budget (Watts) |
Power Sources |
| 55 |
PD (type 4) |
This https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-micro-switches/cat-micro-switches-wp.html#Switchpower also seems to confirm the same - it says UPOE+ powered.
So based on all that, my conclusion is that you need at least a UPOE 60W power supply for it to work.
The only other thing I can suggest to try with POE+ (on the off chance it might work) is to use CDP not LLDP (and definitely *never* have both CDP and LLDP enabled on the ports - IOS usually doesn't handle that very well).
Also make sure you're running the latest IOS just in case it's something that's been fixed/changed in a later release.
As far as TAC is concerned: if they claim to have working repro with POE+ then ask for the "show power inline", "show cdp neigh detail" and "show lldp neighbors detail" from their switch and the "show power", "show cdp neigh detail" and "show lldp neighbors detail" from their microswitch. If you've already closed the case you can ask to re-open it within 2 weeks of closing it.
If the conclusion is that the data sheet info is wrong then submit feedback on the data sheet and they *might* correct it. A number of the AP data sheets have wrong info on them which I've reported and they've never corrected it. Even discussed with BU via account team and they came back with some ridiculous argument to justify having different figures on the datasheet. They say that the data sheet reflects actual AP power consumption (which is more or less right) but the AP actually requests and reserves more power than it needs from the switch (theoretical absolute max power consumption) so the actual power budget needs to be about 30-40% higher than what the data sheet says (even though the AP never uses that power). It's a mess and the people writing these docs have clearly never had to run a network. The only way to confirm the POE data is to test it yourself because the data sheet info cannot actually be trusted anymore. It wouldn't surprise me if it's the same with these - it might only use 23W but they made it reserve at least 60W anyway - you know, just in case and because Cisco says it's helping us save energy etc etc but you need to buy a UPOE switch to make it work (yes I'm getting very cynical)
