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Cisco Bug: CSCur22277 - Auto Port Negotiation causes IP Phone unregister.

Last Modified

May 05, 2016

Products (33)

  • Cisco IP Phone 8800 Series
  • Cisco IP Phone 7841
  • Cisco Unified IP Phone 9951
  • Cisco Unified IP Phone 7962G
  • Cisco Unified IP Phone 7971G-GE
  • Cisco IP Phone 8851
  • Cisco Unified IP Phone 7945G
  • Cisco IP Phone 7821
  • Cisco Unified IP Phone 6961
  • Cisco Unified IP Phone 7941G
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Known Affected Releases

10.2(1)

Description (partial)

Symptom:
Auto Port Negotiation causes IP Phone unregister

Conditions:
If "Automatic Port Synchronization" is enabled, when the computer is shutdown or restarted it must be dropping the network speed from 1000 to 10 mbit and the phone then does a reset to match the speeds. Also note, all computers at their site have Wake on LAN turned on by their IT by default on the machines in the BIOS.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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