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Cisco Bug: CSCul67766 - Quad-VSS Standby Failure causes LC reboot - Failed TestMacNotification

Last Modified

Jul 17, 2018

Products (1)

  • Cisco Catalyst 6000 Series Switches

Known Affected Releases


Description (partial)

In Quad-VSS environment, after standby (failover target) supervisor fails, Module 1 in standby chassis is software reloaded with reason:

Nov 27 14:29:33.718 Sydney: %CONST_DIAG-SW2_STBY-3-HM_TEST_FAIL: Module 1 TestMacNotification detected 5 consecutive failures

Standby (failover target) supervisor fails and standby (chassis) supervisor takes over.
Ensure linecard redundancy for all devices connected to module 1 in standby chassis.
all VSL links connect in LCs, Sup cards have not VSL link.
Online-diag enabled.
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