This read-create object holds the list of external (uplink) interfaces, encoded as an octet string of ifIndex values, that a server interface's traffic should be restricted to when forwarding into the Fibre Channel fabric. Admins configure this to pin a given server-facing interface's traffic mapping to specific uplinks rather than letting the switch pick any available external interface, and it must be set before the corresponding row can be made active. For example, an admin might set this list to reference the ifIndex values for two specific uplink ports so that server traffic on that mapped interface only ever egresses through those two uplinks.