[ "$sourcerouting" != "0" ] && proto_export "SOURCE_ROUTING=1"
[ "$delegate" = "0" ] && proto_export "IFACE_DSLITE_DELEGATE=0"
[ "$delegate" = "0" ] && proto_export "IFACE_MAP_DELEGATE=0"
[ -n "$zone_dslite" ] && proto_export "ZONE_DSLITE=$zone_dslite"
[ -n "$zone_map" ] && proto_export "ZONE_MAP=$zone_map"
[ "$sourcerouting" != "0" ] && proto_export "SOURCE_ROUTING=1"
[ "$delegate" = "0" ] && proto_export "IFACE_DSLITE_DELEGATE=0"
[ "$delegate" = "0" ] && proto_export "IFACE_MAP_DELEGATE=0"
[ -n "$zone_dslite" ] && proto_export "ZONE_DSLITE=$zone_dslite"
[ -n "$zone_map" ] && proto_export "ZONE_MAP=$zone_map"