Zhone zNID-GPON-2402, Configuration Manual

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Management
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zNID 24xx Series Configuration Guide
OMCI configured ONU flows
OMCI configured ONU flows have a one to one mapping between the WAN
side GEM port (GPON Encryption Method port) and the LAN side UNI (User
Network Interface). Other than exception packets which require analysis, such
as IGMP joins and leaves or ARPs, the traffic is generally a cut-through
between the GEM and the UNI.
OMCI configured ONU flows are handled entirely by Classification,
Modification, and Forwarding (CMF) hardware functions. The GPON
interface and each Ethernet LAN port of the 24xx have dedicated CMFs.
Downstream packets that arrive on each GEM are classified based on the
classification rules that have been created by OMCI provisioning actions.
Packets that match a Classification Rule are Modified as specified by that rule
and Forwarded to the egress port specified by that rule. Packets that are not
classified are dropped/blocked. Exception packets that require CPU analysis
(like the IGMP joins and leaves or ARPs) are classified on ingress and
forwarded to the CPU for action. This ONU forwarding architecture is
illustrated in the diagram below.
Figure 4: OMCI configured flows
You cannot map two UNIs to the same GEM when configuring ONU flows. If
three Ethernet Ports must be configured as members of the same VLAN for
High Speed Internet Access Service, three GEMs are required. The same