H35-211_V2.5 Exam Dumps : HCIP-Access V2.5

XG-PON (10G GPON) adopts XGEM framing. Compared with GPON’s 12-bit GEM Port-ID, XGEM expands the Port-ID field to 16 bits, increasing the number of logical data flows that can be identified per ONU/OLT and improving service granularity. Hence the correct length is 16 bits.

A single-layer VLAN is limited by the IEEE 802.1Q VLAN ID space (1–4094), i.e., about 4K VLANs. In large PON deployments, when you must separate multiple services (e.g., HSI, VoIP, IPTV) and the user scale approaches or exceeds the 4K ceiling, a dual-layer VLAN (QinQ) design is required to extend the VLAN namespace and implement hierarchical isolation (access VLAN + service/aggregation VLAN).

Huawei GPON service provisioning supports mapping upstream/downstream service flows to GEM Ports using multiple classifiers, including MAC address, physical port (PORT), VLAN ID, and 802.1p (priority). These classifiers are configured in line/service templates (and pushed via U2000) to ensure precise flow-to-GEM binding.