This read-write object controls whether the local BCP entity initiates negotiation of the Line-Identification option, designed for use when the line is assigned a LAN segment number. This is the analogous negotiation switch to bcpConfigBridgeIdControl, but for identifying which LAN segment rather than which bridge this half-bridge link represents, which matters in topologies where multiple bridged links need to be distinguished by segment. A network with several parallel bridged WAN links representing distinct LAN segments would enable this so each half-bridge pair can confirm they agree on which segment number they're representing.