Layer 2 DCN Configuration Process

This topic describes the Layer 2 DCN configuration process.

Figure 1 shows the common process of configuring Layer 2 DCN communication.

Figure 1 Configuration Process

For configuration task details, see Table 1.

**Table 1** Layer 2 DCN configuration tasks
Task	Remarks
Modifying the NE ID	Set ID and extended ID to be the NE ID according to the DCN planning information.
Setting NE communication parameters	Set parameters required for network communication, such as IP, Extended ID, Gateway IP, Subnet Mask, and Connection Mode.
Configuring Protocol Type (Layer 2 DCN)	In Layer 2 data communication network (DCN) networking, the Layer 2 DCN protocol must be enabled on ports. For an outband DCN, set the DCC channel status to Enabled and the DCC channel protocol to L2DCN. For an inband DCN, set the VLAN ID and bandwidth by referring to Set the VLAN ID and Bandwidth Used by an Inband DCN, enable a DCN on ports by referring to Enable the Port DCN, and then set the port protocol to L2DCN. NOTE: Both DCC channels and inband DCN over an IF port support the L2 DCN solution. The L2 DCN solution is preferred to be implemented over DCC channels. The L2 DCN function cannot be enabled for both inband DCN channels and DCC channels over an IF port.
Configuring IP static routes for an NE	Configure static IP routes if communication between L2 DCN subnets need to be implemented based on L3 forwarding.
Configuring the RSTP protocol	Ring-shaped or other redundant links may be formed on the physical links between microwave equipment, causing loops to Layer 2 forwarding. You can configure the Rapid Spanning Tree Protocol (RSTP) to clear broadcast loops. It is recommended that the RSTP protocol uses its default enable/disable mode Auto. That is, the RSTP protocol is automatically enabled/disabled depending on the enable/disable status of the L2 DCN function over IF ports.

For details about configuration example, see DCN features in Feature Description of the corresponding equipment.