NBN Co Network Design Rules

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NBN Co Network Design Rules The EAS offers redundant connectivity to the access domains via 1Gbps, 10Gbps or sub-rate bit rates. The links can use any of the Transport Domain solutions for connectivity to remote locations (e.g. FAN sites), or direct fibre for any local connections within the POI (e.g. the PDN-GW for wireless access). 1.1.23. Ethernet Fanout Switch (EFS) This platform is used to aggregate a number of Access Seeker interfaces (on the External Network- Network Interface, E-NNI) and fan out the traffic towards other Aggregation Domain network elements such as the Ethernet Aggregation Switch, or another EFS. To support E-NNI redundancy, EFS are deployed in pairs. The EFS node is connected to its paired EFS node and to the EAS nodes using N × 10Gbps direct fibre links, where N is 1 to 5. EAS EFS N × 10Gbps N × 10Gbps EAS N × 10Gbps EFS Figure 30 Aggregation Domain interfaces on the EFS Depending on Access Seeker (AS) demand, EFS nodes may be equipped with a combination of 1Gbps, 10Gbps and 100Gbps (available for future use) Ethernet interfaces. The following connectivity models are supported for the AS E-NNI on the EFS nodes, referred to as the “E-NNI Mode”: E-NNI Mode A: provides an N × 1Gbps or N × 10Gbps uplink to a single EFS node, where N is between 1 and 5 links. 40
NBN Co Network Design Rules EFS/ ECS Active N × 10Gbps AS PE EFS/ ECS Figure 31 E-NNI Mode A connection model from an Access Seeker Provider Edge (AS PE) E-NNI Mode B: provides an N × 1Gbps or N × 10Gbps dual uplink with 1+1 protection to an EFS pair. EFS/ ECS Active N × 1Gbps or N × 10Gbps AS PE EFS/ ECS Standby N × 1Gbps or N × 10Gbps Figure 32 E-NNI Mode B connection model from a single AS PE EFS/ ECS Active N × 1Gbps or N × 10Gbps AS PE EFS/ ECS Standby N × 1Gbps or N × 10Gbps AS PE Figure 33 E-NNI Mode B connection model from two AS PEs 41
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