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クラスタ LIF からクラスタへの ping 送信時にパケット損失が継続される LIF

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環境

  • ONTAP 9
  • CiscoNexusクラスタスイツチ

問題

  • あるノードのクラスタLIFから 別のノードのクラスタLIFにpingを実行すると、pingパケットが破棄され、イベントログに次のアラートが記録されます。

[Node1: vifmgr: vifmgr.cluscheck.ctdpktloss:alert]: Continued packet loss when pinging from cluster lif Node1_clus2 (node Node1) to cluster lif Node2_clus2 (node Node2)

[Node3: vifmgr: vifmgr.cluscheck.ctdpktloss:alert]: Continued packet loss when pinging from cluster lif Node3_clus1 (node Node3) to cluster lif Node4_clus2 (node Node4)

  • これによりクラスタネットワークがデグレード状態になり、次のイベントが報告されます。

[Node1: vifmgr: callhome.clus.net.degraded:alert]: Call home for CLUSTER NETWORK DEGRADED: Large MTU Packet Loss - Ping failures detected between Node1_clus1 ( 169.254.XXX.XXX ) on Node1 and Node2_clus1 ( 169.254.XXX.XX ) on Node2

  • ノードのすべてのクラスタポートに9000 MTUが設定されています。

Cluster::> network port show

Node: Node1
                          Speed(Mbps) Health
Port    IPspace    Broadcast Domain Link MTU  Admin/Oper  Status
--------- ------------ ---------------- ---- ---- ----------- --------
e0a     Cluster    Cluster      up  9000  auto/10000 healthy
e0b     Cluster    Cluster      up  9000  auto/10000 healthy

Node: node2
                          Speed(Mbps) Health
Port    IPspace    Broadcast Domain Link MTU  Admin/Oper  Status
--------- ------------ ---------------- ---- ---- ----------- --------
e0a     Cluster    Cluster      up  9000  auto/10000 healthy
e0b     Cluster    Cluster      up  9000  auto/10000 healthy

 

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