Hi,
During SMB Multichannel, if the NICs are RSS-capable, SMB Multichannel establishes a maximum of four network connections over each NIC. If the NICs on the client are not RSS-capable, SMB Multichannel establishes a single network connection over each NIC. Both configurations allow SMB Multichannel to leverage the combined bandwidth of multiple NICs and provides connection fault tolerance if a connection or a NIC fails.
In regards to your issue, the server-client connection work successfully. So the problem is with the client configuration.
On the SMB client, while the copy operation is running, type the following in Windows PowerShell to verify that the connection uses the right version of SMB and that SMB Multichannel works. Please provide with the screenshots of the commands, it will be of great importance for trouble-shooting:
Get-SmbConnection
Get-SmbMultichannelConnection
Get-SmbMultichannelConnection -IncludeNotSelected
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