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Cisco Bug: CSCta60531 - VSS Preemption causes CAM table updation fails in FWSM env

Last Modified

Jan 29, 2017

Products (1)

  • Cisco Catalyst 6000 Series Switches

Known Affected Releases


Description (partial)


When preemption is used and during switchovers to Secondary switch to be standby,
some packet drops occurs. This can be seen when a host sends traffic through FWSM.
With redundancy force-switchover command, there's no packet drops.
This is due to mac-address-table updation for FWSM fails during preepmtion.


FWSM is used in VSS environment.
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