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由于 ARP 延迟而导致的 DNS 超时警报

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ontap-9
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nas
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适用于

  • ONTAP 9
  • 网络
  • DNS

问题

  • 即使 DNS 服务器可访问,ONTAP 集群也可能报告重复的 DNS 服务器超时事件。
  • 观察到以下 EMS 日志:
    [NodeA:mgwd:dns.server.timed.out:error]: DNS server 10.2xx.1x.94 did not respond to vserver=svm1 within timeout interval.
  • 数据包跟踪分析显示,当 ONTAP 集群尝试到达 DNS 服务器时,ARP 请求和响应之间存在 3 秒的延迟。

5682  2025-11-12 02:18:51.134503Z NetApp_XX:XX:XX  Broadcast  ARP  42  Who has [IP_A]? Tell [IP_B]
5683  2025-11-12 02:18:54.140042Z VMware_XX:XX:XX  NetApp_XX:XX:XX  ARP  60  [IP_A] is at [MAC_A]
5684  2025-11-12 02:18:54.140051Z  [IP_B]  [IP_A]  DNS  90  Standard query 0x33e2 A test.local
5685  2025-11-12 02:18:54.142675Z  [IP_A]  [IP_B]  DNS  106  Standard query response 0x33e2 A test.local A [IP_C]

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