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Cisco Bug: CSCuq54871 - Crash seen when forwarding of SIP MWI as qsig MWI. 15.2M is NOT affected

Last Modified

Sep 14, 2019

Products (96)

  • Cisco IOS
  • Cisco VG204XM Analog Voice Gateway
  • Cisco 2951 Integrated Services Router
  • Cisco C892FSP Integrated Services Router
  • Cisco 812 CiFi Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco C897VA Integrated Services Router
  • Cisco 1905 Serial Integrated Services Router
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Known Affected Releases

15.4(2)T1 15.4(3)M

Description (partial)

Router experiences a crash and reloads. In a 39xx router, you can expect to see a message similar to

Unexpected exception to CPU: vector D, PC = 0x358558D 
-Traceback= 358558D 6E6E351 6CA4BDE 59EFADE 53FDE03 53FF20F 53FF152 53FF00D 53FA95C 5682574 56824D3 5961785 5984575 5623B0E 561D236 5617FA8 55E4705

CCM sends a MWI SIP Message to the voice gateway which is forwarding this as a qsig MWI message. If debug isdn q931 is enabled, you can expect to see
ISDN Se0/1/1:23 Q931: Sending SETUP  callref = 0x0080 callID = 0x8001 switch = primary-qsig interface = Network 
ISDN Se0/1/1:23 Q931: TX -> SETUP pd = 8  callref = 0x0080 
	Bearer Capability i = 0xA880 
		Standard = ISO/IEC 
		Transfer Capability = Unrestricted Digital 
		Transfer Mode = Circuit 
		Transfer Rate = Packet - not specified 
	Channel ID i = 0xAC 
		Exclusive, Channel 39 
	Facility i = 0x9FAA068001018201018B0100A1190201060201503011A1090A01001204353735370A0101830101 
	Called Party Number i = 0x80, '5757' 
		Plan:Unknown, Type:Unknown

Bearer capability 0xA880 indicates qsig MWI call being initiated by the voice gateway.

This is NOT plaform/hw dependant
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