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Cisco Bug: CSCvt70639 - Device reload due to tunnel flapping

Last Modified

Oct 05, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

16.12.2s 16.6.7 16.9.5 17.1.1

Description (partial)

Symptom:
This bug was seen when the device has a flapping tunnel and crash due to a segmentation fault

Conditions:
1. Running a release fixed for CSCvp10711 (for example, 16.6.7).
2. %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnelx, changed state to down

3. The crash was due to a segmentation fault with the below message
UNIX-EXT-SIGNAL: Segmentation fault(11), Process = HQF TARGET DYNAMIC
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