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Cisco Bug: CSCuj64918 - Used inline power not correctly represented when using LLDP

Last Modified

Mar 07, 2018

Products (1)

  • Cisco Catalyst 3850 Series Switches

Known Affected Releases

15.0(1)EY 15.0(1)EY1 15.0(1)EY2

Description (partial)

Symptom:
On a 3850 (Edison), when using Avaya phones and LLDP, the total amount of used POE is not accurately represented in a "show power inline."

Example: With 40+ Avaya phones connected and operational, the output still shows used watts at 0.3
Module   Available     Used     Remaining
          (Watts)     (Watts)    (Watts)
------   ---------   --------   ---------
1          1440.0        0.3      1439.7
2          1440.0        0.0      1440.0
3          1440.0        0.3      1439.7

**Issue appears to be cosmetic

Conditions:
Issue first identified using Avaya phones with LLDP globally enabled.  Power appears to be negotiated and reflected accurately, however after 5-10 minutes, a "show power inline" will show used power as "0.00 watts" on either a single or stack of 3850 switches.

Related Community Discussions

cat 3850 and PoE
I'm a little befuddled on this, but I might be missing something. We are deploying a 3850 stack, with avaya IP phones. What I am seeing looks like a SW bug. The avaya CM is not in place, so the phones can't register and they go into a reboot loop. The 3850 looks like it is calculating the allocated poe additive, and even though there are ~20 phones connected to the 1st switch in the stack, I am getting "power denied, insufficient poe". The phones draw 4w, and total power for mod 1 is 1440 W. But ...
Latest activity: Oct 08, 2013
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