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21 Dell EMC SC Series: Microsoft Multipath I/O Best Practices | CML1004
fabric. This guide assumes two separate virtual-port FC fault domains and fabrics are configured for
redundancy (see Figure 4).
6.3 iSCSI
For iSCSI, verify that patch cables (typically RJ45 Cat5e/Cat6 or SFP-based) are connected from the NIC
ports in the host server to switch ports, and from switch ports to the iSCSI ports on the SC Series array. SC
Series storage does not support connecting iSCSI cables from a host directly to the array. Use of a data
switch that supports iSCSI is required.
As a best practice, iSCSI (storage) traffic should be isolated from all other IP traffic such as LAN or
management. The most resilient way to do this is to configure dedicated iSCSI ports in the host server and
dedicated iSCSI switches for each iSCSI fault domain.
iSCSI configuration with dedicated iSCSI switches, host server NICs, and two fault domains
If using dedicated iSCSI switches is not possible, a less resilient design is to configure VLANs on a shared
data switch to isolate iSCSI traffic from all other IP traffic. The use of separate dedicated iSCSI NICs in the
host server for each iSCSI fault domain is recommended as a best practice.