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"nfs: server hostname not responding, still trying" connecting to ONTAP 9.6 or later in a network with high packet loss

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9.6 and later
  • ONTAP Select
  • NFS
  • Network with high packet loss

Issue

  • NFS client logs error messages about nfs server being unreachable

nfs: server <hostname> not responding, still trying

  • NFS client needs to be rebooted to recover
  • A packet trace will show
    • A very high retransmission timeout for packets coming from the client to the storage
    • What appear to be DSACK ranges sent by the storage controller LIF

 

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