1

I’ve run into a somewhat confusing situation.

I’m running a small office, and we are currently implementing a VoIP solution. Recently we have had 2 additions to our team, and as a result, I had to activate 2 additional PoE ports to accomodate the 2 new phones. Our switch is a somewhat dated Cisco 3560 24 port PoE.

On my end, I have added both new ports to the appropriate Vlan, (In this instance, named it Vlan 2), and configured both as follows:

(both Fa0/21 and 22)

switchport mode access
switchport voice vlan 2
switchport priority extend trust
mls qos trust cos
spanning tree portfast

Now, oddly enough, port 22 works flawlessly. However, Port 21 does not seem to be providing power to the phone. I have tested directly by connecting the phone to the switch. When I connect the laptop to the switch port in question, I get the correct Vlan IP address, so at least the network settings appear to be propagating correctly.

I have tried #power inline auto, but still no luck.

I have attempted the same on yet another unused port, but unfortunately still no luck.

Odds are, I may be missing a step, or doing something alltogether wrong, so I thought I would ask someone with more experience than myself. Any thoughts, suggestions, or ideas are greatly appreciated.

@Cisco

4 Spice ups
2

You may be running out of power.
Try

# sho power inline

This should give you Watts used and Watts Remaining.

It should also tell you the POE info for that port.

3 Spice ups
3

Thank you Justin, I learned something new this weekend :slight_smile:

The power doesn’t seem to be the issue, so that’s another item I can cross of f the list.

Available:370.0(w) Used:44.4(w) Remaining:325.6(w)

4

Lightning rides on brown pair. Check the patch cable you are using and try a different phone to see if that is the problem. If both of those check out, then it I’ll go back to scratching my head.

1 Spice up
5

Hmm Like OJ said try a new patch cable. Have you tried the phone that isn’t working on a different port. May be an issue with the phone not working correctly.

Or tried a working phone on that port?

6

Yup,

Tested the phone on a different port successfully. Phone lights up, finds the Vlan, and connects fairly smoothly.
Tried a different patch cable (tested via cable tester to be sure before hand,) and connected directly to the switch port. This is the head scratcher part, even directly to the switch, the phone will not work. Maybe I can test with a PoE injector. That may tell me for certain whether the issue is power setting.

Will post the result as soon as I test.

7

You can see if these give you any more info for that port.

debug ilpower port

#debug ilpower powerman

#debug ilpower event

How many watts are the phones?

You could also try setting static POE max output.

(config-if)# inline power static max 5000 (5Watts)

8

Brief update, still very confusing situation.

Each phone on the network seems to only consume 6.3 - 10 wats.
I have attempted to crank the port to the max, but oddly there is still no power.

I have tested 3 separate phones on a known working port successfully, but this one still seems to be acting up.

Normally I would assume faulty port, but another port seems to be exhibiting identical issues.

If I do find a solution, I will post it here. In the mean time, still very much open to ideas,

9

Resetting the port to default settings did not help either (#default int PortName#/#)