A company must integrate an iSCSI storage solution into its existing production environment. The new iSCSI network must be accessible from a limited set of network segments. The client devices follow

While a private VLAN can isolate hosts within a VLAN, it does not provide the same level of routing and forwarding isolation as a VRF and might still allow unauthorized segments to route to it if not properly configured with ACLs, which is less robust than VRF for full network segmentation.

A VRF creates independent routing and forwarding tables, effectively isolating the iSCSI network traffic from other network segments on the same physical device. This allows for strict access control and security policies to be applied specifically to the iSCSI VRF, limiting its accessibility to only designated network segments as required.

Connecting an iSCSI storage appliance to a dedicated port on the core switch, without further configuration like VLANs or VRFs, does not inherently provide the required network isolation and strict access control for limited accessibility.

vPC (Virtual Port-Channel) mode provides link aggregation and high availability by allowing a single device to connect to two upstream switches, but it does not inherently offer network segmentation or isolation to limit access from specific network segments.