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Switch alert reported for switch that was already removed

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586
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Category:
fabric-interconnect-and-management-switches
Specialty:
hw
Last Updated:

Applies to

  • ONTAP 9
  • Cluster Switch Health Monitor (CSHM)
  • Cluster network switches

Issue

  • System has been turned into a switchless cluster by removing the network switches previously in use
  • After a reboot of the nodes, the system starts generating weekly health alerts for the switches that are no longer physically present
1/5/2022 06:17:59 node-04 ALERT hm.alert.raised: Alert Id = UnsupportedSwitch_Alert , Alerting Resource = switch-01(XXXXXXXXXXX) raised by monitor ethernet-switch
1/5/2022 06:17:59 node-04 ALERT hm.alert.raised: Alert Id = UnsupportedSwitch_Alert , Alerting Resource = switch-02(XXXXXXXXXXX) raised by monitor ethernet-switch
1/5/2022 06:17:59 node-04 ALERT hm.alert.raised: Alert Id = SwitchCommunityString_Alert , Alerting Resource = switch-01(XXXXXXXXXXX) raised by monitor ethernet-switch
1/5/2022 06:17:59 node-04 ALERT hm.alert.raised: Alert Id = SwitchCommunityString_Alert , Alerting Resource = switch-02(XXXXXXXXXXX) raised by monitor ethernet-switch
 
  • The health of the switch subsystem is showing as degraded
Cluster::> system health config show
Node          Monitor                Subsystem       Health
------------- ---------------------- --------------- ------------------
node-03 node-connect           SAS-connect, CIFS-NDO, MetroCluster_Node
                                                     ok
node-03 controller             Environment, Memory, Service-Processor, Motherboard, IO
                                                     ok
node-04 node-connect           SAS-connect, CIFS-NDO, MetroCluster_Node
                                                     ok
node-04 system-connect         SAS-connect_Cluster, MetroCluster, FHM-Switch, FHM-Bridge
                                                     ok
node-04 system                 -                     ok
node-04 controller             Environment, Memory, Service-Processor, Motherboard, IO
                                                     ok
node-04 chassis                Environment           ok
node-04 ethernet-switch        Switch-Health         degraded
8 entries were displayed.
  • Deleting the logged health alerts only provides a temporary solution
Cluster::> system health alert delete -node * -monitor ethernet-switch -alerting-resource * -alert-id UnsupportedSwitch_Alert
Cluster::> system health alert delete -node * -monitor ethernet-switch -alerting-resource * -alert-id SwitchCommunityString_Alert
  • The switches are still visible under CSHM-SWITCH-CONFIG.XML in the Weekly Autosupports
  • The switches are no longer present on the CLI, so they cannot be removed from monitoring
Cluster::> system switch ethernet show
This table is currently empty.
Cluster::> system switch ethernet delete -device <switch name>
Error: There are no entries matching your query.

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