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Cisco Bug: CSCvi92251 - 3850 / 16.3.6 / SV stack splits after drops on CPU queue (nif_mgr)

Last Modified

Jan 16, 2019

Products (120)

  • Cisco Catalyst 3850 Series Switches
  • Cisco Catalyst 3650-48FS-S Switch
  • Cisco Catalyst 3650-8X24UQ-E Switch
  • Cisco Catalyst 3650-24PDM-E Switch
  • Cisco Catalyst 3650-12X48UQ-L Switch
  • Cisco Catalyst 3650-8X24PD-L Switch
  • Cisco Catalyst 3850-24U-L Switch
  • Cisco Catalyst 3850-12S-E Switch
  • Cisco Catalyst 3850-24P-L Switch
  • Cisco Catalyst 3650-24TD-S Switch
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Known Affected Releases

16.9.1 Denali-16.3.6

Description (partial)

The Stackwise Virtual stack goes into dual active scenario from time to time without apparent reason. If Dual Active Detection is configured then one of the switches goes to Recovery mode.

- Drops (Drop-TH2) on CPU queue number 29 (nif_mgr). CPU drops can be checked with following command:
show platform hardware fed switch active qos queue stats internal port_type egress-cpu asic 0
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