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SwitchUnreachable_alert in MetroCluster IP

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Applies to

  • ONTAP 9
  • FAS/AFF 
  • MetroCluster IP 

Issue

  • SwitchUnreachable_Alert raised on the MCC IP cluster switch

[node1: cshmd: hm.alert.raised:alert]: Alert Id = SwitchUnreachable_Alert , Alerting Resource = Switch_A1(XXXXXXX) raised by monitor ethernet-switch Issue 1 : cluster switch and cluster management IP not reachable.

  • The Cluster-interconnect switch reports it is not monitored by CSHM:

ClusterA::*> system cluster-switch show
Switch                      Type               Address          Model
--------------------------- ------------------ ---------------- ---------------
switch_A1(xxxxxxxxxxx)     cluster-network    10.1.1.111    NX3132V
     Serial Number: xxxxxxxxxxx
      Is Monitored: false 
            Reason: xxxxxxxxxxxxxxx
  Software Version: Cisco Nexus Operating System (NX-OS) Software, Version 7.0(3)I4(1)
    Version Source: CDP

  • The unmonitored switch is present in device-discovery:

::> network device-discovery show

 Node/       Local  Discovered
Protocol    Port   Device                    Interface         Platform
----------- ------ ------------------------- ----------------  ----------------
node1/cdp
            e0a    NX3132V-sw1.example.com(XXXXXXXXXXX)
                                             0/1               NX3132V
            e0b    NX3132V-sw2.example.com(XXXXXXXXXXX)
                                             0/1               NX3132V
node2/cdp
            e0a    NX3132V-sw1.example.com(XXXXXXXXXXX)
                                             0/2               NX3132V
            e0b    NX3132V-sw2.example.com(XXXXXXXXXXX)
                                             0/2               NX3132V

  • There is no answer when pings are attempted from the node-mgmt LIF of the node running the CSHM daemon to the cluster switch management IP address.
  • Cluster LIFs are able to ping the switch successfully.
  • The cluster switch management IP is properly configured.
  • Cluster ping-cluster succeeds on all paths.
  • No issues observed with the physical connectivity between the cluster switch and the management switch.

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