SwitchCommunityStringAlert due to invalid or missing community string on cluster network switch

Applies to

• ONTAP 9
• AFF
• FAS
• Cluster Network Switch
  • CN1610
  • CISCO Nexus Switch

Issue

• After a reboot of FAS/AFF, SwitchCommunityString_Alert the health alert is triggered by Cluster Switch Health Monitor (CSHM).
• This generates the following Active IQ notification:

HA Group Notification (Health Monitor process cshm: SwitchCommunityString_Alert[switch01]) ALERT

• The system health subsystem show reports the Switch-Health subsystem as degraded.

Cluster::> system health subsystem show
Subsystem         Health
----------------- ------------------
SAS-connect       ok
Environment       ok
Memory            ok
Service-Processor ok
Switch-Health     degraded

• The system health alert show the command displays the error below:

Cluster::> system health alert show
               Node: Node-04
           Resource: cluster-sw-01(serial-number)
           Severity: Major
    Indication Time: Wed Sep 14 13:45:36 2022
           Suppress: false
        Acknowledge: false
     Probable Cause: Ethernet switch "Cluster-sw-01(serial-number)" with IP
                     address "10.XX.XX.XX" is not reachable via SNMP.
                     Incorrect SNMP community string might be configured on the Ethernet switch.
    Possible Effect: Ethernet switch communication problems and accessibility issues.
 Corrective Actions: Check the SNMP community string on the Ethernet switch
                     to verify that the expected community string is configured.
                     Use the "system switch ethernet show -snmp-config" command to view the expected
                     community string.

• CSHM-SWITCH-CONFIG.XML via ASUP displays the error below.

Switch Monitoring Status： false
Reason For Not Monitoring： Invalid SNMP Settings