Skip to main content
NetApp Knowledge Base

NDMP performance issue due to MTU mismatch

Views:
1,672
Visibility:
Public
Votes:
0
Category:
ndmp
Specialty:
DP
Last Updated:

Applies to

  • ONTAP 9
  • CommVault

Issue

  • Most of the time, the backups are failing, which is causing the perceived performance issue
  • Errors in backup log:
dmp Tue Mar 17 13:23:52 EDT 2020 /BackupSVM/BackupVol(3) Log_msg (Write DIRNET for BKP ID=271, type=3 interrupted while at waiting for max inflight. Error = Broken pipe.)
dmp Tue Mar 17 13:23:52 EDT 2020 /BackupSVM/BackupVol(3) Error (Write to socket failed)
dmp Tue Mar 17 13:23:52 EDT 2020 /BackupSVM/BackupVol(3) Tape_close (ndmp)
dmp Tue Mar 17 13:23:52 EDT 2020 /BackupSVM/BackupVol(3) Log_msg (Flush DIRNET called on error = -1.
  • Packet trace analysis shows that the Media Agent was sending zero windows to the NetApp NDMP server
  • Pings using jumbo frame with -disallow-fragmentation set to true failed to reach the Media Agent, but can reach the gateway to the Media Agent

::> net ping -vserver <> -lif  <> -destination <> -disallow-fragmentation  true -packet-size 8972

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.