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DNS timeout alerts due to ARP delays

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • Networking
  • DNS

Issue

  • ONTAP clusters may report recurring DNS server timeout events, even when DNS servers are reachable.
  • The following EMS log is observed:
    [NodeA:mgwd:dns.server.timed.out:error]: DNS server 10.2xx.1x.94 did not respond to vserver=svm1 within timeout interval.
  • Packet trace analysis shows a 3-second delay between the ARP request and response when the ONTAP cluster attempts to reach the DNS server.

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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