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Veeam NFS backups report nightly Nblade.nfsRCChecksumMismatch error

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9
  • NFS v3
  • Application: Veeam Backup & Replication v12
  • Client OS: Windows Server 2019 (version 1809, VMXNET3 virtual adapter)

Issue

  • Nblade.nfsRCChecksumMismatch: Replay cache checksum mismatch detected in retransmitted NFS request from client.
  • Error occurs during nightly Veeam NFS backup jobs, typically 2-6 minutes after job start (scheduled at 6PM EST).
  • Backups complete successfully; no current business impact, but error correction is desired.
  • Error first observed when backup jobs started nearly a year ago after solution implementation.
  • Environment details: Veeam server uses a dedicated NIC for NFS traffic to storage VM.
  • Relevant shares accessed:
    • nfs3://<storage_IP>:/htdc_veeam_backups
    • nfs3://<storage_IP>:/omtc_veeam_backups
    • nfs3://<storage_IP>:/omtc_veeam_cfg_backups

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