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Cisco Bug: CSCun31375 - Calls over 15 minutes involving CUBE are dropped

Last Modified

Apr 24, 2020

Products (74)

  • Cisco IOS
  • Cisco 892W Integrated Services Router
  • Cisco C892FSP Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco VG204XM Analog Voice Gateway
  • Cisco 888W Integrated Services Router
  • Cisco 812 CiFi Integrated Services Router
  • Cisco C897VA Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco 886VA-CUBE Integrated Services Router
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Known Affected Releases

15.3(3)M

Description (partial)

Symptom:
Calls in duration over 15 minutes involving CUBE and UCCE may be dropped. This is a deployment in which the CUBE forks media for recording at MediaSense.

Conditions:
Make a call involving  UCCE and CUBE. Leave the call up for 15 minutes.
This roughly occurs 1 out of a 100 kiosk under traffic. It is difficult to determine the exact call rate failure as this is a very intermittent issue. The worst case we have observed is 1 call failure in the first 100 calls attempted.
The reason for the call drop is that after 15 minutes CUCM attempts to refresh the session between CUCM and CUBE by sending a SIP re-INVITE message. Sometimes (rarely) CUBE ignores this re-INVITE message. Thus, CUCM concludes that the call/session is not really active and tears down the call by sending a BYE message to CUBE.
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