Hi Roger,  If you use IP Roles, check what IPs are set for SDS-only and then check whether appropriate vNICs are assigned to the ScaleIO-Data2 Port Group.  You can also try to run some rebuilds and monitor pNICs activies on ESXi level - either with "esxtop" or "esxcli network nic stats get -n vmnic5" on that box.  Hope that helps!  Best, Pawel
This is our current environment: ScaleIO v2.0-6035.0 Windows 2012 r2 datacenter vcenter 6.0.0, 3634793 (4) esxi 6.0.0 3620759  How do I verify the rebalance/rebuild traffic uses a specific vmic5 and vSwitch1? [IMAGE]
Rebuild/Rebalance Traffic