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Node unreachable due to cluster ports being down

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

Applies to

  • FAS2720
  • ONTAP 9.7P7
  • BES-53248 cluster network switches

Issue

  • Node is seen via storage failover show command
Cluster::> storage failover show
                              Takeover
Node           Partner        Possible State Description
-------------- -------------- -------- -------------------------------------
node-01        node-02 true   Connected to node-02
node-02        node-01 true   Connected to node-01
node-03        node-04 true   Connected to node-04
node-04        node-03 true   Connected to node-03
  • Node appears unreachable via node show command 
Cluster::> node show
Node Health Eligibility Uptime Model Owner Location
--------- ------ ----------- ------------- ----------- -------- ---------------
node-01 true true 128 days 00:59 AFF-A220 London
node-02 true true 128 days 00:59 AFF-A220 London
node-03 true true 128 days 00:21 FAS2720 London
node-04 true true - - - -
4 entries were displayed.
  • Based on uptime the node is running
Cluster::> node run -node * -c "uptime"
4 entries were acted on.

Node: node-01  2:32pm up 131 days,  2:30 14786852056 NFS ops, 3892 CIFS ops, 0 HTTP ops, 0 FCP ops, 0 iSCSI ops, 0 NVMF ops
Node: node-02  2:32pm up 131 days,  2:30 20465055899 NFS ops, 3884 CIFS ops, 0 HTTP ops, 0 FCP ops, 0 iSCSI ops, 0 NVMF ops
Node: node-03  2:32pm up 131 days,  1:52 981629257 NFS ops, 5809919861 CIFS ops, 0 HTTP ops, 0 FCP ops, 3209009366 iSCSI ops, 0 NVMF ops
Node: node-04  2:32pm up 131 days,  1:52 7395009429 NFS ops, 4593427421 CIFS ops, 0 HTTP ops, 0 FCP ops, 0 iSCSI ops, 0 NVMF ops
  • Cluster network ports are reported as down
	slot 0: 10 Gigabit Ethernet Controller IX5-SFP+
		e0a MAC Address:    XX:XX:XX:XX:XX:XX (auto-unknown-fd-down)
		    SFP Vendor:         Molex Inc.      
		    SFP Part Number:    747529720       
		    SFP Serial Number:  XXXXXXXXX
  • Cluster network switch connected to these ports is reported as missing
Node node-02
Monitor cluster-switch
Alert ID ClusterSwitchMissing_Alert
Alerting Resource switch-01
Subsystem Switch-Health
Indication Time Sat Jun 26 13:42:57 2021
Perceived Severity Major
Probable Cause Configuration_error
Description Redundant configuration is missing for cluster switches.
  • Visual inspection of the switch shows no LED activity on any of the cluster ports
  • When connecting to the switch over serial all cluster ports are shown as having been disabled
(switch-01) #show port all

                 Admin     Physical   Physical   Link   Link    LACP   Actor
Intf      Type   Mode      Mode       Status     Status Trap    Mode   Timeout
--------- ------ --------- ---------- ---------- ------ ------- ------ --------
0/1              Disable   10G Full              Down   Enable  Enable long
0/2              Disable   10G Full              Down   Enable  Enable long
0/3              Disable   10G Full              Down   Enable  Enable long
0/4              Disable   10G Full              Down   Enable  Enable long

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