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VRRP dual Master state after state changes on same VRID

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TitleVRRP dual Master state after state changes on same VRID
Symptoms
After an VRRP state change a dual VRRP master situations happens
Environment
  • VRRP
  • EXOS
  • Modules/slots with multiple ASICs
Cause
This is caused by a bug (CR xos0067506) where some programming of the internal ACL rules needed for VRRP operation are not installed correctly on all ASICs.
Resolution
Upgrade to one of the following or newer releases where fix is included:
  • 15.3.5.2-patch1-14
  • 16.2.3.5-patch1-1
  • 21.1.3.7-patch1-5
A workaround is to disable VRRP and enable it again, this will re-install the ACL rules on all modules.
Another workaround is causing another single state change that would also trigger this.
Additional notes

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