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Upgrade to version 16 caused MLAG network issues

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TitleUpgrade to version 16 caused MLAG network issues
Symptoms
MLAG configuration gone after upgrade from 15.x to 16.x
Environment
  • EXOS 15.x -> 16.x
  • MLAG
Cause
EXOS 15.x does not prevent the wrong config where the ISC vlan has too much ports added. This should only be a pointy to point connection.
This can result in unpredicted behavior.

In 16.x this is no longer possible and after a reboot in 16.x the complete MLAG port config will be gone because of the invalid configuration.


 
Resolution
To correct this you should remove the "other ports", you have to correct this FIRST while running 15.x
Additional notes

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