Hey,
How is your iSCSI initiator configure? Could you share the details?
You can use Wireshark or similar tools. Filter via iSCSI protocol to analyze network traffic. https://wiki.wireshark.org/iSCSI
In addition, you can simply run diskspd benchmark and monitor network traffic in the Task Manager.
https://github.com/microsoft/diskspd
As an alternative, you can use StarWind VSAN to create iSCSI Target. Using ACL you can bound traffic to a specific NIC.
https://www.starwindsoftware.com/help/TheAccessRightsTaboftheManagementConsole.html
Cheers,
Alex Bykovskyi
StarWind Software
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