This object holds the specific list of uplink (external) interfaces that traffic from a given server interface should be restricted to using, letting an administrator pin down which physical fabric uplinks handle traffic from a particular server-facing port rather than letting the switch pick automatically. Administrators configure this when they need deterministic traffic routing for a server interface, such as ensuring a specific server always uses a designated pair of uplinks for its Fibre Channel traffic. For example, an admin might set this list to reference two specific uplink interface indices so that traffic from an important server interface is always mapped to only those two external interfaces rather than any available one.