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Cisco Bug: CSCvu36204 - Nexus 3k rebooted with error "Reset Requested due to Fatal Module Error"

Last Modified

Aug 14, 2020

Products (61)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 31108TC-V Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 93108TC-FX Switch
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Known Affected Releases

7.0(3)I7(7)

Description (partial)

Symptom:
Switch rebooted a couple of times with error "Reset Requested due to Fatal Module Error" on N3K-C3048TP-1GE

`show system reset-reason`
----- reset reason for module 1 (from Supervisor in slot 1) ---
1) At 878254 usecs after Thu Apr 30 22:21:26 2020
    Reason: Reset Requested due to Fatal Module Error
    Service: System manager
    Version: 7.0(3)I7(7)

Show logging log:
2020 Apr 30 23:12:55 rtsw02.nas05 %UFDM-3-FIB_IPv4_ADJ_CONSISTENCY_CHECKER_PASS: FIB IPv4 adjacency consistency checker PASSED on slot ALL
2020 Apr 30 23:12:55 rtsw02.nas05 %UFDM-3-FIB_IPv4_ROUTE_CONSISTENCY_CHECKER_FAIL: FIB IPv4 consistency checker FAILED on slot ALL
2020 Apr 30 23:12:58 rtsw02.nas05 %UFDM-3-FIB_IPv6_ADJ_CONSISTENCY_CHECKER_PASS: FIB IPv6 consistency checker PASSED on slot ALL
2020 Apr 30 23:12:58 rtsw02.nas05 %UFDM-3-FIB_IPv6_ROUTE_CONSISTENCY_CHECKER_FAIL: FIB IPv6 route consistency checker FAILED on slot ALL

Conditions:
Consistency checker must be running while doing a churn. This leads to inconsistent state, which is avoided by the fix.
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