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Cisco Bug: CSCuq56034 - IPFIB crash due to segmentation fault

Last Modified

May 25, 2020

Products (6)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 3016 Switch
  • Cisco Nexus 3064-T Switch
  • Cisco Nexus 3048 Switch
  • Cisco Nexus 3132Q Switch

Known Affected Releases


Description (partial)

In certain scenarios a Nexus 3000 running Fiji code might experience an IPFIB crash with the following message - "VDC-1 %$ %SYSMGR-2-SERVICE_CRASHED: Service "ipfib" (PID xxxx) hasn't caught signal 11 (core will be saved)."

This happens under a very specific set of conditions

The crash is triggered when the following two conditions are satisfied:
1) Presence of a IPv6 prefix a1/m1 and a covering prefix a1/m2, where the 128-bits of the IPv6-address part of the prefix match exactly
2) The following two route update sequences are triggered due to network events
   a) At point in time x, Add/Update a1/m1 and a1/m2 in the same MTS buffer
   b) At a later point in time y (x and y could be quite apart, as long as there are no further updates for a1/m1 or a1/m2 during the interim), another event with Add/Update of a1/m2 and Delete of a1/m1 is triggered in the same MTS buffer
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