Snapmirror replication failed

[Nikhilpatil]

Thu Jan 21 01:20:06 CET 2021 ScheduledUpdate[Jan 21 01:05:00]:<ID> Operation-Uuid=<ID> Group=none Operation-Cookie=0 action=Defer source=Cluster1:vol_source destination=Cluster2:vol_dest status=Failure message=Transfer failed.(Replication operation request failed from Cluster Id: <ID>, Node Id: <ID> to Cluster Id: <ID>, Node Id: <ID> due to a network error(CSM: Operation referred to a non-existent session.))

[Nikhilpatil]

I have below please provide your resolution ASAP

[paul_stejskal]

Per https://kb.netapp.com/Advice_and_Troubleshooting/Data_Protection_and_Security/SnapMirror/SnapMirror_CSM%3A_An_operation_did_not_complete_within_the_sp... this means you have network errors/issues. This would require investigation to make sure there aren't things like packet loss. A packet trace would be prudent as well. https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_determine_packet_loss_and_the_possible_reasons_it_could_be_occu...

[Mjizzini]

Were @paul_stejskal  links  helpful to  your situation?

SnapMirror CSM: An operation did not complete within the specified timeout window

[wareer]

Maybe that's why. I hope it helps：
https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/SnapMirror_transfers_fail_with_checksum_mismatch_or_unmarshal_errors