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Cisco Bug: CSCtc04016 - high CPU in SIP pointing to 491/ack loop

Last Modified

Jan 28, 2017

Products (1)

  • Cisco 3800 Series Integrated Services Routers

Known Affected Releases

12.4(15)T7 15.0(1)XA5

Description (partial)

Symptoms: A Cisco IOS VoIP gateway configured for IPIPGW/CUBE may experience 
high CPU utilization, which causes additional calls through the router to 

Conditions: This symptom is observed under rare conditions when SIP-
associated processes on the Cisco IOS gateway (as seen when the <CmdBold>show 
process cpu<noCmdBold> command is entered) cause extremely high CPU 
utilization, which causes further calls through the router to fail.
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  • Full Description (including symptoms, conditions and workarounds)
  • Status
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