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ASR100x running IOS XE version 15.3(1)S configured as a CUBE Ent has been seen to have segmentation fault in certain rare circumstances. CUBE(Ent) on ASR has gone through really hard performance testing and this bug was not seen. Exception to IOS: Frame pointer 0x7F98F04FB980, PC = 0x3A534E6 IOS Thread backtrace: UNIX-EXT-SIGNAL: Segmentation fault(11), Process = IOSXE-RP Punt Service Process -Traceback= 1#9821b08208133f5124c039ddebb8173b :400000+36534E6 :400000+203F6E8 :400000+1A9972F :400000+1A2C3B4 :400000+1A52F50 :400000+6487473 :400000+6486359
Trigger of the issue is unknown.
Since the crash is reported when port 26132 was used, by not using this port (udp port 26132 which was corresponding to the index 4874 in port_array). crash can be avoided. This can be done by changing the port range to something like 26134 to 32767 (currently it is 16384 to 32767) but this will reduce the number of CUBE calls from 4000 to around 1600 calls. In Cisco IOS XE3.10.1, this port range is 8000 to 48199 by default, so we will have a bigger port range to start with, and in this case the port corresponding to index 4874 is 17748, so we will have to change the port range to 18000 ? 48199 using the configuration. In addition Cisco IOS XE3.10.1 also allows configuration where the packets can be dropped in DP if no session exists in DP. This will not cause any one way audio as the IOSd is not really meant to process the media on ASR, and if there are any media issues those need to be addressed differently. Further Problem Description:
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