Unicom_GPON_Standard
一: 15.5.3 GEM连接模式协商流程
ONU应至少同时支持N:P bridge-filtering方式和 N:M bridge-mapping 两种链接方式。
N-P bridge-filtering, 有vlan tagging filtering data, P侧2个mac bridge port config data, 各上接1个GEM interworking TP.
N-M bridge-mapping, 无vlan tagging filtering data, P侧1个macbrige port config data, 上接 1个802.1p mapper svc profile, 继续上接2个GEM interworking TP.