Symptom

Cisco CUBE crashes with a segmentation fault in the CCSIP_SPI_CONTROL process. The crash is seen in the following stack trace: Exception to IOS Thread: UNIX-EXT-SIGNAL: Segmentation fault(11), Process = CCSIP_SPI_CONTROL <<<<< A crashinfo and a system-report with one IOSd core file are generated.

Conditions

Cisco CUBE is configured with SIP-SIP calls and is processing a high volume of calls. Cisco CUBE Router running IOS-XE 17.12.1a or 17.12.2 SIP DTMF configuration has SIP KPML enabled in the dial-peers VoIP Trace is enabled under voice service voip > trace

Workaround

One possible workaround is to remove SIP KPML DTMF method from the dial-peers. This can be done by removing the "dtmf-relay sip-notify sip-kpml" command from the dial-peers and leaving rtp-nte: dial-peer voice xx voip dtmf-relay rtp-nte

Further Problem Description