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How do you change DNS to use TCP instead of UDP in ONTAP?

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Category:
ontap-9
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NAS
Last Updated:

Applies to

  • ONTAP 9
  • DNS

Answer

  • There are no options in ONTAP to enforce either UDP or TCP exclusively for DNS queries

Additional Information

  • For more information, see RFC 1035, section 2.3.4 and 4.2.1
  • ONTAP will intially use UDP for all DNS queries
    • If the response exceeds the maximum window size of UDP(512 bytes), ONTAP will then retry with TCP

 

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