This read-only value indicates whether this Extended Border Node may add dynamic entries to a subnetwork routing list for a given LU: none(1) permits no dynamic additions, limited(2) permits only likely-to-succeed entries to be added, and full(3) allows all native EBNs plus adjacent non-native EBNs and network nodes to be added. Admins configure and check this to control how aggressively the EBN expands its search scope beyond the statically configured routing list when searching for a given LU across subnetworks. For example, setting this to full(3) for a critical, hard-to-locate LU broadens the search to include every plausible native and adjacent border node rather than relying solely on the manually defined list.