If one or both NSX Edge cluster nodes fail due to a hardware or software issue, you must redeploy the failed NSX Edge instances. You do not restore the NSX Edge nodes from a backup.
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Prepare for Restoring NSX Edge Cluster Nodes Before restoring an NSX Edge node, you must retrieve its deployment details from the NSX Manager cluster and retrieve the credentials of the failed NSX Edge node from SDDC Manager.
Replace the Failed NSX Edge Node with a Temporary NSX Edge Node You deploy a temporary NSX Edge node in the domain, add it to the NSX Edge cluster, and then delete the failed NSX Edge node.
Replace the Temporary NSX Edge Node with the Redeployed NSX Edge Node After you replaced and deleted the failed NSX Edge node, to return the NSX Edge cluster to its original state, you redeploy the failed node, add it to the NSX Edge cluster, and delete then temporary NSX Edge node.