VCSA Upgrade – Fatal error during network preservation

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Problem
Upgrading a vCSA 6.0 U3 to 6.5 U3 received in stage 2 at 50% of progress bar a “fatal error”

Error: Fatal error during network preservation

Solution
To solve the issue is enough to perform below steps and re initiate the upgrade process,

  1. Login to https://:5480 vami page
  2. Navigate to Networking and enable IPV6 settings.
  3. Select the NIC and IPv6 Settings and Select the below option:
    “Obtain IPv6 automatically through DHCP”

That’s it

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