Example for Configuring DCN

This section provides an example for configuring the data communication network (DCN) feature.

Networking Requirements

As shown in Figure 1, the GNE is directly connected to an NMS and two NEs. A static route is configured for communication between the NMS and GNE. After the DCN function is configured, the NMS can manage the attached NEs through the GNE and automatically discover new NEs.

Figure 1 Networking diagram for configuring DCN

Precautions

Before configuring DCN, note the following:

An NMS's IP address is a public IP address, and a GNE's NEIP address is a Layer 3 virtual private network (VPN) address. To implement address conversion, you must specify a GNE's interface that is connected to an NMS, bind the GNE's interface to a DCN VPN instance, and set an IP address for the GNE's interface.
The binding operation must be performed before you set an IP address for the interface. Otherwise, this IP address will be deleted when you bind the interface to the DCN VPN instance.

Configuration Roadmap

The configuration roadmap is as follows:

Enable the DCN feature globally.
Bind the interface (connecting the GNE to the NMS) to a DCN VPN instance. Then set an IP address for the interface.
Configure a static route for communication between the NMS and GNE.
Configure the automatic NE report function on the GNE.

Data Preparation

To complete the configuration, you need the following data:

Name of the DCN VPN instance

A DCN VPN instance named __dcn_vpn__ is automatically generated when the DCN feature is enabled globally on the GNE.

You can run the display ip vpn-instance command on the GNE to view the DCN VPN instance name.
IP address of the interface connecting the GNE to the NMS

Procedure

Enable the DCN feature globally.

# Enable the DCN feature globally. In this example, a GNE is used.

<HUAWEI> system-view
[~HUAWEI] sysname gne
[*HUAWEI] commit
[~gne] dcn
[*gne-dcn] ne-ip 10.1.1.2 24
[*gne-dcn] quit

Bind the interface (connecting the GNE to the NMS) to DCN VPN instance __dcn_vpn__. Then, set an IP address for the interface.

[*gne] interface GigabitEthernet 0/1/0
[*gne-GigabitEthernet0/1/0] ip binding vpn-instance __dcn_vpn__
[*gne-GigabitEthernet0/1/0] ip address 172.16.1.2 16
[*gne-GigabitEthernet0/1/0] commit
[~gne-GigabitEthernet0/1/0] quit

Configure a static route for communication between the NMS and GNE. For configuration details, see "Configuration Files" in this section.
Configure the automatic NE report function on the GNE.
# Enable the automatic NE report function on the GNE.
```
[~gne] dcn
[*gne-dcn] auto-report
[*gne-GigabitEthernet0/1/0] commit
```

Verify the configuration.

# View the configurations of the GNE.

<gne> display dcn brief
------------------------------------------------
 NE-ID:               0x280FC
 NE-IP:               10.1.1.2
 Mask:                255.255.255.0
 DCN-Interface:       LoopBack2047
 Auto-Report:         Enable
------------------------------------------------

Configuration Files

Configuration file of the GNE

#                                                                               
ip dcn vpn-instance __dcn_vpn__                                                 
#                                                                               
interface GigabitEthernet0/1/0                                                  
 undo shutdown                                                                  
 dcn                                                                            
 ip binding vpn-instance __dcn_vpn__                                            
 ip address 172.16.1.2 255.255.0.0                                             
#                                                                               
interface LoopBack2047                                                    
 description DCN loopback interface                                             
 ip binding vpn-instance __dcn_vpn__                                            
 ip address 10.1.1.2 255.255.255.0                                               
#                                                                               
ospf 65534 vpn-instance __dcn_vpn__                                             
 description DCN ospf create by default                                         
 opaque-capability enable                                                       
 vpn-instance-capability simple                                                 
 area 0.0.0.0                                                                   
  network 0.0.0.0 255.255.255.255                                               
#                                                                               
!The DCN function implements the capability of plug-and-play for this device.
!A NE IP address based on the unique NE ID is automatically generated in VPN
!of DCN. It is recommended that the NE IP address be changed to the planned 
!one by running the ne-ip X.X.X.X <MASK>command after the device being online.
dcn                                                                             
 auto-report                                                                    
 ne-ip 10.1.1.2 255.255.255.0
#                                                                               
return

Configuration files of NE1 and NE2

#                                                                               
interface GigabitEthernet0/1/1                                                  
 undo shutdown                                                                  
 dcn                                                                            
#                                                                               
interface LoopBack2047                                                    
 description DCN loopback interface                                             
 ip binding vpn-instance __dcn_vpn__                                            
 ip address 10.1.1.3 255.255.0.0                                               
#                                                                               
ospf 65534 vpn-instance __dcn_vpn__                                             
 description DCN ospf create by default                                         
 opaque-capability enable 
 hostname                                                       
 vpn-instance-capability simple                                                 
 area 0.0.0.0                                                                   
  network 0.0.0.0 255.255.255.255                                               
#                                                                               
!The DCN function implements the capability of plug-and-play for this device.
!A NE IP address based on the unique NE ID is automatically generated in VPN
!of DCN. It is recommended that the NE IP address be changed to the planned 
!one by running the ne-ip X.X.X.X <MASK>command after the device being online.
dcn                                                                             
#                                                                               
return