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Cisco Bug: CSCuq31981 - Cisco 79xx phone DHCP behavior defect

Last Modified

Mar 08, 2019

Products (36)

  • Cisco Unified IP Phone 7900 Series
  • Cisco Unified IP Phone 7945G
  • Cisco Unified IP Phone Expansion Module 7914
  • Cisco Unified Wireless IP Phone 7920
  • Cisco Unified IP Phone 7971G-GE
  • Cisco Unified IP Phone 9951
  • Cisco Unified IP Phone 7962G
  • Cisco Unified IP Phone 6941
  • Cisco Unified IP Phone 7941G
  • Cisco Unified IP Phone 7961G-GE
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Known Affected Releases


Description (partial)

This defect was found during DHCP migration. Seems the phone caches DHCP IP address unless the DHCP discover process is triggered by phone reset. As comparison, other network device can adopt the new DHCP IP address after the new DHCP server acknowledge the DHCP lease renew request and use the new DHCP IP for the future renewal.

Phone model : 7961/ 79XX
Firmware Version : SCCP41.9-3-1SR2-1S
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