Help Center/ Virtual Private Network/ Best Practices/ Connecting Multiple On-premises Branch Networks Through a VPN Hub/ Procedure
Updated on 2023-10-20 GMT+08:00
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Procedure

Prerequisites

  • Cloud side
    • A VPC has been created. For details about how to create a VPC, see Creating a VPC and Subnet.
    • Security group rules have been configured for the VPC, and ECSs can communicate with other devices on the cloud. For details about how to configure security group rules, see Security Group Rules.
  • Data center side
    • IPsec has been configured on the VPN devices in the two on-premises data centers. For details, see Administrator Guide.
    • The remote subnets of the VPN device in on-premises data center 1 must contain the local subnet of the Huawei Cloud VPC and the subnet to be interconnected in on-premises data center 2. The remote subnets of the VPN device in on-premises data center 2 must contain the local subnet of the Huawei Cloud VPC and the subnet to be interconnected in on-premises data center 1.

Procedure

Huawei Cloud VPNs support static routing mode, BGP routing mode, and policy-based mode. The following uses the static routing mode as an example.

  1. Configure a VPN gateway.

    1. Choose Virtual Private Network > Enterprise – VPN Gateways, and click Buy VPN Gateway.
    2. Set parameters as prompted.

      Table 1 only describes the key parameters for creating a VPN gateway.

      Table 1 Description of VPN gateway parameters

      Parameter

      Description

      Value

      Name

      Name of a VPN gateway.

      vpngw-001

      Network Type

      Select Public network.

      Public network

      Associate With

      Select VPC.

      VPC

      VPC

      Huawei Cloud VPC that the on-premises data centers need to access.

      vpc-001(192.168.0.0/16)

      Local Subnet

      VPC subnets that the on-premises data centers need to access.

      192.168.0.0/24,192.168.1.0/24

      Interconnection Subnet

      This subnet is used for communication between the VPN gateway and VPC. Ensure that the selected interconnection subnet has four or more assignable IP addresses.

      192.168.2.0/24

      BGP ASN

      BGP AS number.

      64512

      HA Mode

      Select Active-active.

      Active-active

      Active EIP

      Active EIP used by the VPN gateway to access the on-premises data centers.

      1.1.1.2

      Active EIP 2

      Standby EIP used by the VPN gateway to access the on-premises data centers.

      2.2.2.2

  2. Configure customer gateways.

    1. Choose Virtual Private Network > Enterprise – Customer Gateways, and click Create Customer Gateway.
    2. Set parameters as prompted.

      Table 2 only describes the key parameters for creating a customer gateway.

      Table 2 Description of customer gateway parameters

      Parameter

      Description

      Value

      Name

      Name of a customer gateway.

      cgw-fw1

      Routing Mode

      Select Static.

      Static

      Gateway IP Address

      IP address used by the customer gateway in on-premises data center 1 to communicate with the Huawei Cloud VPN gateway.

      Ensure that UDP port 4500 is permitted on the customer gateway device in the on-premises data center.

      1.1.1.1
    3. Repeat the preceding operations to configure the customer gateway (2.2.2.1) in on-premises data center 2.

  3. Configure VPN connections between the cloud side and on-premises data center 1.

    1. Choose Virtual Private Network > Enterprise – VPN Connections, and click Buy VPN Connection.
    2. Set parameters for VPN connection 1 and click Submit.

      Table 3 only describes the key parameters for creating a VPN connection.

      Table 3 Description of VPN connection parameters

      Parameter

      Description

      Value

      Name

      Name of a VPN connection.

      vpn-001

      VPN Gateway

      VPN gateway for which the VPN connection is created.

      vpngw-001

      Gateway IP Address

      Active EIP bound to the VPN gateway.

      1.1.1.2

      VPN Type

      Select Static routing.

      Static routing

      Customer Gateway

      Name of a customer gateway.

      cgw-fw1

      Customer Subnet

      Subnet in on-premises data center 1 that needs to access the VPC on Huawei Cloud.

      • A customer subnet cannot be included in any local subnet or any subnet of the VPC to which the VPN gateway is attached.
      • Reserved VPC CIDR blocks such as 100.64.0.0/10 and 214.0.0.0/8 cannot be used as customer subnets.

      172.16.0.0/16

      Interface IP Address Assignment
      • Manually specify

        In this example, select Manually specify.

      • Automatically assign

      Manually specify

      Local Tunnel Interface IP Address

      Tunnel interface IP address configured on the VPN gateway.

      169.254.70.1

      Customer Tunnel Interface IP Address

      Tunnel interface IP address configured on the customer gateway device.

      169.254.70.2

      Link Detection

      Whether to enable route reachability detection in multi-link scenarios. When NQA is enabled, ICMP packets are sent for detection and your device needs to respond to these ICMP packets.

      NQA enabled

      PSK, Confirm PSK

      The value must be the same as the PSK configured on the customer gateway device.

      Test@123

      Policy Settings

      The policy settings must be the same as those on the customer gateway device.

      Default
    3. Create VPN connection 2.

      For VPN connection 2, you are advised to use the same parameter settings as VPN connection 1, except the parameters listed in the following table.

      Table 4 Parameter settings for VPN connection 2

      Parameter

      Description

      Value

      Name

      Name of a VPN connection.

      vpn-002

      Gateway IP Address

      Active EIP 2 bound to the VPN gateway.

      2.2.2.2

      Local Tunnel Interface IP Address

      Tunnel IP address of the VPN gateway.

      169.254.71.1

      Customer Tunnel Interface IP Address

      Tunnel IP address of the customer gateway.

      169.254.71.2

  4. Configure VPN connections between the cloud side and on-premises data center 2.

    1. Choose Virtual Private Network > Enterprise – VPN Connections, and click Buy VPN Connection.
    2. Set parameters for VPN connection 1 as prompted and click Submit.

      Table 5 only describes the key parameters for creating a VPN connection.

      Table 5 Description of VPN connection parameters

      Parameter

      Description

      Value

      Name

      Name of a VPN connection.

      vpn-003

      VPN Gateway

      VPN gateway for which the VPN connection is created.

      vpngw-001

      Gateway IP Address

      Active EIP bound to the VPN gateway.

      1.1.1.2

      Customer Gateway

      Name of a customer gateway.

      cgw-fw2

      VPN Type

      Select Static routing.

      Static routing

      Customer Subnet

      Subnet in on-premises data center 2 that needs to access the VPC on Huawei Cloud.

      • A customer subnet cannot be included in any local subnet or any subnet of the VPC to which the VPN gateway is attached.
      • Reserved VPC CIDR blocks such as 100.64.0.0/10 and 214.0.0.0/8 cannot be used as customer subnets.

      10.10.0.0/16

      Interface IP Address Assignment
      • Manually specify

        In this example, select Manually specify.

      • Automatically assign

      Manually specify

      Local Tunnel Interface IP Address

      Tunnel interface IP address configured on the VPN gateway.

      169.254.72.1

      Customer Tunnel Interface IP Address

      Tunnel interface IP address configured on the customer gateway device.

      169.254.72.2

      Link Detection

      Whether to enable route reachability detection in multi-link scenarios. When NQA is enabled, ICMP packets are sent for detection and your device needs to respond to these ICMP packets.

      NQA enabled

      PSK, Confirm PSK

      The value must be the same as the PSK configured on the customer gateway device in on-premises data center 2.

      Test@123

      Policy Settings

      The policy settings must be the same as those configured on the customer gateway device in on-premises data center 2.

      Default
    3. Create VPN connection 2.

      For VPN connection 2, you are advised to use the same parameter settings as VPN connection 1, except the parameters listed in the following table.

      Table 6 Parameter settings for VPN connection 2

      Parameter

      Description

      Value

      Name

      Name of a VPN connection.

      vpn-004

      Gateway IP Address

      Active EIP 2 bound to the VPN gateway.

      2.2.2.2

      Local Tunnel Interface IP Address

      Tunnel IP address of the VPN gateway.

      169.254.73.1

      Customer Tunnel Interface IP Address

      Tunnel IP address of the customer gateway in on-premises data center 2.

      169.254.73.2

  5. Configure customer gateway devices in on-premises data centers 1 and 2.

    The configuration procedures may vary according to the type of the customer gateway device. For details, see Administrator Guide.

Verification

  • About 5 minutes later, check states of the VPN connections.

    Choose Virtual Private Network > Enterprise – VPN Connections. The states of the four VPN connections are all Available.

  • Verify that servers in on-premises data center 1 and servers in on-premises data center 2 can ping each other.