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High Protocol Latency on FAS25xx with clustered Data ONTAP for remote LIF traffic

Last Updated:

Applies to

  • Clustered Data ONTAP 8.3
  • FAS2000 series
  • FAS2552-R6
  • Clustered Data ONTAP 8.3RC1


Users report high protocol latency while accessing data hosted on clustered ONTAP on FAS25xx series and clustered Data ONTAP.

System has Qlogic NIC cards used for intercluster ports.

EMS logs similar to the following can be reported in ASUPs:
NwkThd_02: Nblade.dBladeNoResponse:warning]: Gave up retrying a file operation due to no response from the specified node. UUID of the node where data is located is fa000834-a355-11e4-87bc-5f5978ef59aa; the protocol for the operation is NFS.

Error messages similar to the following might also be reported:
[Nblade.JunctionRootLookup2:warning] Junction root lookup of a volume in Vserver 5 with MSID 2147484692 has failed for reason "CSM_TIMEOUT"

[Nblade.CifsOperationTimedOut:error] Detected a timed out CIFS operation. SMB command code for this operation: 5 Number of times this command was suspended: 2 Number of times this command was restarted: 0 Last CSM error during this operation: CSM_TIMEOUT Last SpinNp error during this operation: SPINNP_NO_FO_ERROR Client IP address: Local IP address: Target Vserver ID: 5 Target disk's DSID: 0


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