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    Edge Network Acceleration:Connect an ENS VPC to central cloud VPC through ENA

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    Edge Network Acceleration:Connect an ENS VPC to central cloud VPC through ENA

    Last Updated:Aug 22, 2025

    This topic describes how to use Edge Network Acceleration (ENA) to connect an Edge Node Service (ENS) virtual private cloud (VPC) to your services on central cloud.

    Example scenario

    A company has a VPC with the CIDR block 192.168.200.0/24 in the Alibaba Cloud ENS Macao (China)-1 node. They also have a VPC with the CIDR block 172.16.100.0/24 in the China (Hong Kong) node. The company uses ENA for establishing private communication between the central VPC and the ENS VPC. The company opts for Border Gateway Protocol (BGP), which allows the Alibaba Cloud Express Connect Virtual Border Router (VBR) to exchange routing information with the Edge Virtual Border Router (EVBR). The required bandwidth is 100 Mbps.

    image

    The following table describes the network CIDR block for this example. You can plan your own CIDR blocks, but make sure that they do not overlap.

    Organization

    CIDR block

    Server or client address

    ENS VPC

    192.168.200.0/24

    ENS instance address: 192.168.200.1

    Central cloud VPC

    172.16.100.0/24

    ECS instance address: 172.16.100.1

    EVBR

    • VLAN: 100

    • EVBR-side IPv4 address: 10.0.0.2/30

    • Client-side IPv4 address: 10.0.0.1/30

    Not applicable

    Central cloud VBR

    • VLAN: 100

    • VBR-side IPv4 address: 10.0.0.1/30

    • Client-side IPv4 address: 10.0.0.2/30

    Not applicable

    Prerequisites

    Procedure

    Step 1: Create an EPN instance

    Create and activate an EPN instance.

    1. Log on to the ENA console, and choose Business Instances > EPN Instances.

    2. On the Edge Private Network Instance page, click Create EPN Instance and configure the following parameters.

      Item

      Description

      Name

      The name of the instance.

      Region

      Select Global (Outside Chinese Mainland).

      Description

      The description of the instance.

    3. After you complete the configuration, click OK.

    4. After the instance is created, click OK in the pop-up window to activate the instance, then click Buy Now on the payment page.

      Note

      The service is pay-as-you-go, so you do not need to pay any fees for creating an instance. For details about the billing method of EPN, see Price of Edge Private Network.

    5. On the order confirmation page, click Activate Now.

    Step 2: Create an EVBR on an edge port and configure routing

    1. On the Edge Private Network Instance page, find the instance that you created and click Details.

    2. On the details page, click the Create EVBR and configure the following parameters.

      Note

      The parameter values in this topic are for reference only. Specify the values as needed. For more information about the parameters, see Create an access point.

      Item

      Description

      Example value

      Edge Access Port

      Select the edge port on which you want to create the EVBR.

      The edge port instance on which you want to create the EVBR.

      Note

      If no edge port instance is available, see Edge network resources to create one.

      VLAN ID

      Set the VLAN ID of the EVBR.

      100

      Bandwidth

      Set the bandwidth of the EVBR in Mbps.

      100

      Route Method

      Select whether to use BGP or static routing.

      BGP

      Edge Cloud Peer IP Address

      Set the IPv4 address on the EVBR side.

      10.0.0.2/30

      Client Peer IP Address

      Set the IPv4 address on the peer side of the EVBR.

      10.0.0.1/30

    3. Configure VBR routing.

      • Perform this setup in the Alibaba Cloud Express Connect console. For more information, see Configure and manage BGP.

      • When you configure VBR routing, enter 45103 as the peer AS number. This is the unified AS number for the ENA EVBR.

    Step 3: Create an ENSGW and associate a vSwitch

    1. On the Edge Private Network Instance page, find the instance that you created and click Details.

    2. On the details page, click Add ENSGW and configure the following parameters.

      Configuration

      Description

      Example value

      Node

      Select the ENS node where you want to create the ENSGW.

      mo-taipa-1

      Rate Limit (Mbit/s)

      Set the rate limit for the ENSGW.

      100

    3. On the details page of the instance, verify that the status of the ENSGW that you created is Running.

    4. Click Associate vSwitch on the right side of the corresponding ENSGW and configure the following parameters.

      Note

      After the ENSGW is created, you need to associate an ENS vSwitch to add the VPC to the network.

      Configuration

      Description

      vSwitch

      Select the ENS vSwitch that you want to add to the Edge Multipoint Connection Instance.

      Note

      You can view ENS vSwitches in the ENS console.

    5. After you confirm the information, select the I Have Confirmed the vSwitch Information check box and click OK.

    Step 4: Test the connection

    Perform the following steps to test the network connection.

    1. On the host 172.16.100.1 in the central cloud VPC, open the command-line window.

    2. Ping the IP address 192.168.200.1 of the ENS instance. A reply message indicates that the central cloud VPC can communicate with the ENS VPC 192.168.200.0/24.