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Cisco Bug: CSCub01318 - VPN router crash after tunnel "no shut" - Cell intf as tunnel source

Last Modified

Jan 28, 2017

Products (103)

  • Cisco IOS
  • Cisco 861W Integrated Services Router
  • Cisco 1812 Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco AS5400XM Universal Gateway
  • Cisco VG224 Analog Voice Gateway
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 1905 Serial Integrated Services Router
  • Cisco VG204 Analog Voice Gateway
  • Cisco 1803 Integrated Services Router
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Known Affected Releases

15.1(3)T4 15.1(4)M4

Description (partial)

An ISR router configured as GRE over IPSec (DMVPN or regular site-to-site)  crashes shortly after enabling (no shut) the tunnel interface. During the crash, CPUHOG / Watchdog events may be seen due to NHRP:

%SYS-3-CPUHOG: Task is running for (XXX)msecs, more than (2000)msecs (1/1),process = NHRP.
-Traceback= 0xXXXXXXXX
%SYS-2-WATCHDOG: Process aborted on watchdog timeout, process = NHRP.
-Traceback= 0xXXXXXXXX

The tunnel source is a Cell interface
The onboard crypto accelerator of the ISR is used (default unless another accelerator card is installed)
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