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Cisco Bug: CSCun02605 - asr1k crashes in CCSIP_SPI_CONTROL

Last Modified

Apr 25, 2020

Products (17)

  • Cisco IOS
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
  • Cisco ASR 901-12C-FT-D Router
  • Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks
  • Cisco 7600 Series Route Switch Processor 720 with Multilayer Switch Feature Card
  • Cisco ME 3600X-24CX-M Switch
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Known Affected Releases

15.3(3)S2

Description (partial) 

Symptom: ASR crashes with no known trigger in CCSIP_SPI_CONTROL process.
Conditions: It is an error scenario where crash occurs when router is not able to send ACK for 200 OK where branch parameters differ.

                                    CUBE
  INVITE                          |       INVITE (Via branch=ABC)
----------------------------->| ---------------------------------------->
                                         |    200 OK (Via branch=DEF)
                                         | <-----------------------------------------
                                         | Cube fails to send ACK to 200 OK for some reason and causes a crash
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