SwitchUnreachable_Alert and UnsupportedSwitch_Alert reported on cluster network switch

• ONTAP 9
• Cluster network switch

Cluster nodes reported the following health alerts:

• SwitchUnreachable_Alert
• UnsupportedSwitch_Alert

These alerts were observed for both cluster switches. The output from system commands showed:

cluster::> system health alert show
Node: node-02
Alert ID: SwitchUnreachable_Alert
Resource: switch1(FDOxxxx6AV)
Severity: Major
Indication Time: Wed Jan 07 14:46:30 2026

cluster::> system switch ethernet show
Switch                Type            Address         Model
---------------------------------------------------------------
switch1(FDOxxxx6AV) cluster-network 192.xx.x.51 OTHER
  SerialNumber: Unknown
  IsMonitored: false
  Reason: IP address not reachable
  SoftwareVersion: Cisco Nexus Operating System (NX-OS) Software, Version 10.4(5)
  VersionSource: CDP/ISDP

switch2(FDOxxxx6BA) cluster-network 192.xx.x.52 OTHER
  SerialNumber: Unknown
  IsMonitored: false
  Reason: IP address not reachable
  SoftwareVersion: Unknown
  VersionSource: CDP/ISDP

Attempts to ping the switch management IPs from the cluster nodes failed.