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ネットワークの輻輳が原因でテイクオーバーが無効になったアラート

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metrocluster
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環境

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

問題

  • MetroCluster IP 構成でテイクオーバー無効化アラートが報告されました:

[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復旧します:

[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出力では、e0c/e0dポートで高いTXエラーが報告される場合があります。
  • sw_iwarpスレッドが原因でHostos使用率が高くなっています

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