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Cisco Bug: CSCuq56417 - standby switch- VSS falls to rommon backplane Hardware Rev is => 1.3

Last Modified

Sep 14, 2019

Products (1)

  • Cisco Catalyst 6000 Series Switches

Known Affected Releases

15.1(2)SY3

Description (partial)

Symptom:
Following logs seen when adding standby switch to VSS:

*Aug 26 03:44:20.627: %PFREDUN-SW2_STBY-6-STANDBY: Initializing for SSO mode in Default Domain
6503E chassis with backplane hardware revision lower than 1.3 does not support standby supervisor card VS-S2T-10G-4.
The stdby supervisor will be forced to ROMMON.

ST43CR02SF-VSS#show idprom switch 2 backplane 
IDPROM for backplane, chassis 2, #0
  (FRU is 'Catalyst 6500 3-slot backplane')
  OEM String = 'Cisco Systems'
  Product Number = 'WS-C6503-E'
  Serial Number = 'FXS1749Q1JS'
  Manufacturing Assembly Number = '73-9371-04'
  Manufacturing Assembly Revision = 'B0'
  Hardware Revision = 1.4
  Current supplied (+) or consumed (-) = -0.80A

from Michael Sifuentes (internal) to Everyone:
ST43CR02SF-VSS#show idprom switch 1 backplane 
IDPROM for backplane, chassis 1, #0
  (FRU is 'Catalyst 6500 3-slot backplane')
  OEM String = 'Cisco Systems'
  Product Number = 'WS-C6503-E'
  Serial Number = 'FXS1752Q1KV'
  Manufacturing Assembly Number = '73-9371-04'
  Manufacturing Assembly Revision = 'B0'
  Hardware Revision = 1.4
  Current supplied (+) or consumed (-) = -0.80A

Conditions:
VSS standby tries to join the VSS
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