In the Layer 2 data communication network (DCN) solution, the U2000 Web LCT implements NE management through Layer 2 forwarding. DCN data is encapsulated into Ethernet frames and forwarded at Layer 2 between NEs. The Layer 2 DCN solution simplifies configuration for a hybrid network of Huawei's RTN NEs and third-party microwave NEs that support Layer 2 networking. These microwave NEs cannot run dynamic routing protocols, so a large number of static routes must be configured for DCN communication. With a Layer 2 DCN for RTN NEs, the number of configured static routes is greatly reduced.
Purpose
As shown in Figure 1, on the hybrid network, Ethernet DCN packets are transmitted between Huawei's NEs and third-party NEs, enabling both parties' Network Management Systems to manage their own NEs on a network where the other party's NEs exist.
Application Scenario
As shown in Figure 1, the Layer 2 DCN solution is used for network management at Layer 2. A network is divided into several subnets, for example, subnets 10.3.1.0/24, 10.3.2.0/24, and 10.3.3.0/24. DCN packets are forwarded in the same subnet at Layer 2 and between subnets (for example, subnets 10.3.2.0/24 and 10.3.3.0/24) at Layer 3. Unified network management is implemented with only a few static routes configured on key nodes.
As shown in Figure 1, DCN packets are forwarded at Layer 2 over microwave links between NE21 and NE22, NE41 and NE42, NE51 and NE52 through microwave ports. With Layer 2 forwarding, NE41 and NE42 (Huawei's NEs) allow DCN packets of NE51 to NE54 (third-party NEs) to traverse Huawei's NEs and reach the third-party networking management system. Each NE should be configured by turn.
