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Cisco Bug: CSCsy80055 - High CPU while registering sip phones to CME (12.4.24T)

Last Modified

Feb 22, 2014

Products (1)

  • Cisco 1800 Series Integrated Services Routers

Known Affected Releases


Description (partial)


High CPU while SIP phones are the in the process of registering to CME (12.4.24T)


With following topology,

SIP IP Phones----SIP---3560POE---SIP---CME.

With around 100 sip phones, and 10-15 POE switches, if you reboot few POE switches, this causes the SIP phones to try and register with CME causing high CPU utilization with processes CCSIP_SPI_CONTRO and CCSIP_UDP_SOCKET which further prevents registeration of any phones.
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