ClusterSwitchConfig_Alert reported in system health alert for non-existing switch

Applies to

• ONTAP 9
• Cluster Switch Health Monitor (CSHM) AutoSupport message

Issue

• Subsystem health for switch gets degraded:

cluster1::> system health subsystem show
Subsystem         Health
----------------- ------------------
SAS-connect       ok
Environment       ok
Memory            ok
Service-Processor ok
Switch-Health     degraded
CIFS-NDO          ok
Motherboard       ok
IO                ok
MetroCluster      ok
MetroCluster_Node ok
FHM-Switch        ok
FHM-Bridge        ok
SAS-connect_Cluster ok

• EMS reports one or more of the following health alerts:

• Output of system health alert show similarly shows one or more of the following:

               Node: node-01
           Alert ID: SwitchUnreachable_Alert
           Resource: sw1
     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: node-01
           Alert ID: ClusterSwitchConfig_Alert
           Resource: node-01
     Probable Cause: One or more nodes are not connected to both cluster
                     switches.
    Possible Effect: If one cluster switch fails, "node0-1" might lose
                     access to the cluster.
Corrective Actions: Ensure the switch "sw1" is connected
                     to the node "node-01".

               Node: node-01
           Alert ID: SwitchCommunityString_Alert
           Resource: sw1
     Probable Cause: Cluster switch "sw1" with IP address
                     "123.123.123.123" is not reachable via SNMP. Incorrect
                     SNMP community string might be configured on the
                     cluster switch.
    Possible Effect: Cluster switch communication problems and
                     accessibility issues.
Corrective Actions: Check the SNMP community string on the cluster switch
                     to verify the expected community string is configured.
                     Use the "system cluster-switch show -snmp-config"
                     command to view the expected community string.

• The switch name and IP address in the alert do not belong to any cluster switches or is reported in the case of a switchless cluster.
• Command system switch ethernet show is blank or unknown or reports switches with IP address not reachable.
• Deleting the health alert does not resolve the issue.