Operation Guide

Scenario

Figure 1 shows the typical networking where a VPN gateway connects to the Huawei AR router in an on-premises data center in policy-based mode.

Figure 1 Typical networking diagram

Click to enlarge

In this scenario, the AR router has only one IP address, and the VPN gateway uses the active-active mode. A VPN connection is created between each of the two active EIPs of the VPN gateway and the IP address of the AR router.

Limitations and Constraints

VPN and AR routers support different authentication and encryption algorithms. When creating connections, ensure that the policy settings at both ends are the same.

Data Plan

**Table 1** Data plan
Category	Item	Example Value for the AR Router	Example Value for the Huawei Cloud Side
VPC	Subnet	172.16.0.0/16	192.168.0.0/24 192.168.1.0/24
VPN gateway	Gateway IP address	1.1.1.1 (IP address of the uplink public network interface GE0/0/8 on the AR router)	Active EIP: 1.1.1.2 Active EIP 2: 2.2.2.2
VPN gateway	Interconnection subnet	-	192.168.2.0/24
VPN connection	IKE policy	IKE version: IKEv2 Authentication algorithm: SHA2-256 Encryption algorithm: AES-128 DH algorithm: group 14 Lifetime (s): 86400 Local ID: IP address Peer ID: IP address
VPN connection	IPsec policy	Authentication algorithm: SHA2-256 Encryption algorithm: AES-128 PFS: DH group 14 Transfer protocol: ESP Lifetime (s): 3600

Operation Process

Figure 2 shows the process of using the VPN service to enable communication between the data center and VPC.

Figure 2 Operation process
Click to enlarge

**Table 2** Operation process description
No.	Configuration Interface	Step	Description
1	Management console	Create a VPN gateway.	Bind two EIPs to the VPN gateway. If you have purchased EIPs, you can directly bind them to the VPN gateway.
2		Create a customer gateway.	Configure the AR router as the customer gateway.
3		Create VPN connection 1.	Create a VPN connection between the active EIP of the VPN gateway and the customer gateway.
4		Create VPN connection 2.	Create a VPN connection between active EIP 2 of the VPN gateway and the customer gateway. It is recommended that the connection mode, PSK, IKE policy, and IPsec policy settings of the two VPN connections be the same.
5	CLI of the AR router	Configure the AR router.	The local and remote tunnel interface addresses configured on the AR router must be the same as the customer and local tunnel interface addresses configured on the VPN console, respectively. The connection mode, PSK, IKE policy, and IPsec policy settings on the AR router must be same as those of VPN connections.
6	-	Verify network connectivity.	Run the ping command to verify network connectivity.