スイッチレスクラスタシステムでネットワークポートのフラッピングが観察されました

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環境

AFFシステム
FASシステム
スイッチレス構成
- クラスタポート経由で直接接続されたノード

問題

リンクが絶えずフラッピングされると、クラスタネットワークのネットワークポートが停止します。

[Node-01: kernel: netif.linkDown:info]: Ethernet e0c: Link down, check cable.

[Node-01: vifmgr: vifmgr.portdown:notice]: A link down event was received on node Node-01, port e0c.

[Node-01: vifmgr: vifmgr.clus.linkdown:EMERGENCY]: The cluster port e0c on node Node-01 has gone down unexpectedly.

[Node-01: vifmgr: vifmgr.portup:notice]: A link up event was received on node Node-01, port e0c.

[Node-01: vifmgr: vifmgr.port.monitor.failed:error]: The "link_flapping" health check for port e0c (node Node-01) has failed. The port is operating in a degraded state.

[Node-01: vifmgr: callhome.clus.net.degraded:alert]: Call home for CLUSTER NETWORK DEGRADED: Frequent Link Flapping - Cluster port e0c on node Node-01 has experienced multiple link down notifications.

ポートの劣化が原因でLIFが移動されていることを示す複数のメッセージが表示されます。例：

[Node-01: vifmgr: vifmgr.portDeg.lifMoved:notice]: LIF Node-01_clus2 (on virtual server 1234567890), IP address 169.254.202.133, is being moved to node Node-01, port e0d from node Node-01, port e0c because the port's health status is in a degraded state. [Node-01: vifmgr: vifmgr.portDeg.lifMoved:notice]: LIF Node-01_clus2 (on virtual server 1234567890), IP address 169.254.202.133, is being moved to node Node-01, port e0c from node Node-01, port e0c because the port's health status is in a degraded state. [Node-01: vifmgr: vifmgr.portDeg.lifMoved:notice]: LIF Node-01_clus1 (on virtual server 1234567890), IP address 169.254.104.99, is being moved to node Node-01, port e0d from node Node-01, port e0c because the port's health status is in a degraded state. [Node-01: vifmgr: vifmgr.portDeg.lifMoved:notice]: LIF Node-01_clus1 (on virtual server 1234567890), IP address 169.254.104.99, is being moved to node Node-01, port e0c from node Node-01, port e0c because the port's health status is in a degraded state. [Node-01: vifmgr: vifmgr.lifmoved.linkdown:notice]: LIF Node-01_clus2 (on virtual server 1234567890), IP address 169.254.202.133, is being moved to node Node-01, port e0d. [Node-01: vifmgr: vifmgr.lifmoved.linkdown:notice]: LIF Node-01_clus1 (on virtual server 1234567890), IP address 169.254.104.99, is being moved to node Node-01, port e0d.

ポートの健常性がデグレード状態になった理由は、コマンドを使用したlink_flappingです network port show