CONTAP-248951: Cluster switch reports SwitchUnreachable_Alert/IP address not reachable after ONTAP upgrade

Issue

Issue:
After upgrading ONTAP, one or more nodes report that the cluster switches are unreachable:
[ClusterA::*> system switch ethernet show
Switch                      Type               Address          Model
--------------------------- ------------------ ---------------- ---------------
Switch-A1 
                            cluster-network    1.2.3.4     OTHER
     Serial Number: Unknown
      Is Monitored: false
            Reason: IP address not reachable
  Software Version: Cumulus Linux version 5.4.0 running on Mellanox
                    Technologies Ltd. MSN2010
    Version Source: LLDP

Switch-A2
                            cluster-network    1.2.3.5     MSN2100-CB2FC
     Serial Number: Unknown
      Is Monitored: false
            Reason: IP address not reachable
  Software Version: Cumulus Linux version 5.4.0 running on Mellanox
                    Technologies Ltd. MSN2010
    Version Source: LLDP]

An alert is also observed in [system health alert show]:
[Node: ClusterA-01
Alert ID: SwitchUnreachable_Alert
Resource: Switch-A1
Severity: Major
Indication Time: Fri May 03 09:39:17 2024
Suppress: false
Acknowledge: false
Probable Cause: The ethernet switch's IP address is not reachable from the local node.
Possible Effect: Monitoring of the switch and log collection will not function.
Corrective Actions: Ensure that the IP address is reachable or specify the correct reachable IP address.

Node: ClusterA-01
Alert ID: SwitchUnreachable_Alert
Resource: Switch-A2
Severity: Major
Indication Time: Fri May 03 09:39:18 2024
Suppress: false
Acknowledge: false
Probable Cause: The ethernet switch's IP address is not reachable from the local node.
Possible Effect: Monitoring of the switch and log collection will not function.
Corrective Actions: Ensure that the IP address is reachable or specify the correct reachable IP address.]