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    • https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Node_unhealthy_after_controller_upgrade
      After completing controller upgrade from AFF8060 to AFF A700 the new shows not healthy node03 true true node04 true true Cluster applications fail to come online on the new controller node02 node01 fa...After completing controller upgrade from AFF8060 to AFF A700 the new shows not healthy node03 true true node04 true true Cluster applications fail to come online on the new controller node02 node01 false Waiting for node01, Takeover is node03 node04 true Connected to node04 node04 node03 true Connected to node03 Connecting directly to the node management LIF of the replaced node shows all nodes in the cluster unhealthy Migrating all cluster LIFs over a single switch brings the node healthy again
    • https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/CLUSTER_NETWORK_DEGRADED_messages_after_controller_upgrade
      Following a controller upgrade, the cluster sends CLUSTER NETWORK DEGRADED alerts with no apparent reason Mon Dec 20 04:50:47 +0100 [node02: vifmgr: callhome.clus.net.degraded:alert]: Call home for CL...Following a controller upgrade, the cluster sends CLUSTER NETWORK DEGRADED alerts with no apparent reason Mon Dec 20 04:50:47 +0100 [node02: vifmgr: callhome.clus.net.degraded:alert]: Call home for CLUSTER NETWORK DEGRADED: Total Packet Loss - Ping failures detected between node02_clus1 ( 169.254.2.92 ) on node02 and node01_test ( 169.254.111.226 ) on node01 The missing LIF was created to allow controller upgrade to complete and has since been deleted