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Cisco Bug: CSCuq35247 - Phone can't failover to sub server using UDP

Last Modified

Aug 13, 2014

Products (41)

  • Cisco IP Phone 8800 Series
  • Cisco DX80
  • Cisco Unified IP Phone 7945G
  • Cisco Unified IP Phone 7971G-GE
  • Cisco Unified IP Phone 7962G
  • Cisco IP Phone 7841
  • Cisco DX650
  • Cisco Unified IP Phone 9951
  • Cisco Unified SIP Phone 3905
  • Cisco IP Phone 8851
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Known Affected Releases


Description (partial)

Phone can't failover to sub server using UDP

phone load: sip88xx.10-2-2-5
1. Have a UCM cluster with 1 Primary, 1 Secondary and 1 SRST
2. Configure the phone security profile to use UDP
3. Register the phone to the primary UCM
4. phone idle or setup a call to another phone
5. Shut down the UCM service on the primary UCM

result: phone can't failover to sub server
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