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ネットワークの輻輳が原因のテイクオーバー無効アラート

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環境

  • ONTAP 9
  • MetroCluster IP
  • AFF A250(ソフトウェアiWARP)

問題

  • MetroCluster IP構成で報告されるテイクオーバー無効アラート:

[Node_A1: cf_main: cf.fsm.takeoverOfPartnerDisabled:error]: Failover monitor: takeover of Node_A2 disabled (unsynchronized log).

  • テイクオーバー機能は数秒で自動的にリカバリされます。

[NodeA1: cf_main: cf.fsm.takeoverOfPartnerEnabled:notice]: Failover monitor: takeover of Node_A2 enabled

  • ONTAPは ネットワーク輻輳イベントを報告します。

[Node_A1: mccip_mirror_congestion_mgr_p: mcc.network.congestion:notice]: Network congestion detected. Action taken: Increased ic_timeout to 1200 msec.

  • ノードからのifstatの出力で、e0c / e0dポートで大量のTXエラーが報告されることがあります。
  •  sw_iWARPスレッドが原因でホストの使用率が高い

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