Preparing the ONTAP software for the update
Some ONTAP features have configuration requirements that must be completed before the cluster software version can be updated.
- Verifying that the netgroup file is present on all nodes
If you have loaded netgroups into storage virtual machines (SVMs), before you upgrade or revert, you must verify that the netgroup file is present on each node. A missing netgroup file on a node can cause an upgrade or revert to fail. - Enabling and reverting LIFs to home ports (preparing the ONTAP software for the update)
During a reboot, some LIFs might have been migrated to their assigned failover ports. Before and after you upgrade, revert, or downgrade a cluster, you must enable and revert any LIFs that are not on their home ports. - Preparing all load-sharing mirrors for a major upgrade
Before performing a major upgrade from ONTAP 9.5, you should move all of the load-sharing mirror source volumes to an aggregate on the node that you will upgrade last. This ensures that load-sharing mirror destination volumes are the same or later versions of ONTAP. - Identifying active CIFS sessions that should be terminated
Before performing a nondisruptive upgrade or downgrade, you should identify and gracefully terminate any CIFS sessions that are not continuously available. - Configuring LDAP clients to use TLS for highest security
Before upgrading to the target ONTAP release, you must configure LDAP clients using SSLv3 for secure communications with LDAP servers to use TLS. SSL will not be available after the upgrade. - Preparing SnapMirror relationships for a nondisruptive upgrade or downgrade
It is recommended that you quiesce your SnapMirror operations before performing a nondisruptive upgrade or downgrade of ONTAP. - Preparing to upgrade nodes using Storage Encryption with external key management servers
If you are using Storage Encryption (SE) and upgrading to ONTAP 9.5 or later, you must delete any existing external key management (KMIP) server connections before performing the upgrade.
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