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Flooding in VxLan after routing change in the underlay network

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TitleFlooding in VxLan after routing change in the underlay network
Symptoms
Flooding of VxLan traffic after the underlay network has a routing change
Environment
VxLan
EXOS
 
Cause
When the next-hop changes for the VxLan endpoints the change is not executed in hardware correctly in some cases.
This is known as CR xos0075717
Resolution
Upgrade to an EXOS version that fixes this bug, 
  • 22.7.1.2-patch1-4 or higher
  • 30.4.1
A workaround can be clearing the fdb.
Additional notes

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