Preview Tool

Cisco Bug: CSCvs15528 - AP1562 PoE negotiation failed with CDP

Last Modified

Jun 19, 2020

Products (1)

  • Cisco Aironet 1850 Series Access Points

Known Affected Releases


Description (partial)

PoE negotiation failed with CDP after a period of time from bootup,
and this causes both radios down.

Nov 19 14:42:03 brain: CDP PoE negotiation START
Nov 19 14:43:04 brain: CDP PoE negotiation FAILED !!

If PoE switch supports both CDP and DDLP, AP starts PoE negotiation with LLDP
and radios come back up. However, using LLDP is not a possible workaround.
After a period of time, PoE negotiation also failed with LLDP and both radios goes down.

Nov 19 14:43:04 brain: LLDP PoE negotiation START
Nov 19 14:43:36 brain: LLDP PoE negotiation FAILED !!

This problem is observed when AP1562 is powered by PoE.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.