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    Edge Network Acceleration:Connect an IDC to an ENS VPC via ENA

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    Edge Network Acceleration:Connect an IDC to an ENS VPC via ENA

    Last Updated:Aug 25, 2025

    This topic describes how to connect an on-premise Internet Data Center (IDC) to an Edge Node Service (ENS) virtual private cloud (VPC) via Edge Network Acceleration (ENA).

    Example scenario

    A company has an on-premise IDC in Macao (China) with the private CIDR block 172.16.100.0/24. The company also created a VPC with the CIDR block 192.168.200.0/24 on the ENS China Macao-1 node. To connect them, ENA is used to establish a private 100 Mbps link, and Border Gateway Protocol (BGP) to allow the IDC to exchange routing information with an Edge Virtual Border Router (EVBR).

    image

    The following table describes the CIDR block in this example. You can plan your own CIDR blocks. Make sure they do not overlap.

    Organization

    CIDR block planning

    Server or client address

    On-premise IDC

    172.16.100.0/24

    Client address: 172.16.100.1

    ENS VPC

    192.168.200.0/24

    ENS instance address: 192.168.200.1

    EVBR

    • VLAN: 100

    • EVBR-side IPv4 peer IP address: 10.0.0.2/30

    • Customer-side IPv4 peer IP address: 10.0.0.1/30

    Not applicable

    Prerequisites

    • Make sure that your Alibaba Cloud account has passed verification. You can log on to the Alibaba Cloud Management Console and check the verification at the Account Center.

    • You have created a VPC and a vSwitch on the Alibaba Cloud ENS China Macao-1 node, and deployed your services on cloud resources such as ENS instances in the VPC. For more information, see Create and manage VPCs and vSwitches.

    • You have connected edge access ports and lines to your on-premises IDC. For more information, see Edge access ports and lines.

    • You understand the billing rules for ENA. For information about the fees for edge access ports, edge access lines, and edge multi-point connection bandwidth, see:

    Procedure

    Step 1: Create an Edge Private Network (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.

      Parameter

      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 Enable Now.

    Step 2: Create an EVBR on the edge access 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 parameters in this topic are for reference only. Adjust the values as needed. For more information about the parameters, see Create an access point.

      Parameter

      Description

      Example value

      Edge Access Port

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

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

      Note

      If the edge access port instance does not exist, see Edge network resources to create one.

      VLAN ID

      Set the VLAN ID for the EVBR.

      100

      Bandwidth

      Set the bandwidth for the EVBR in Mbps.

      100

      Route Method

      Select whether to use BGP or static routing.

      BGP

      Client AS Number

      Set the BGP AS number for the peer of the EVBR.

      65001

      Edge Cloud Peer IP Address

      Set the IPv4 address for the EVBR side.

      10.0.0.2/30

      Client Peer IP Address

      Set the IPv4 address for the EVBR to connect.

      10.0.0.1/30

    3. Configure routing for the on-premises IDC.

      1. Configure the BGP protocol on the on-premises gateway device. The AS number for the ENA EVBR is 45103.

      2. Announce the 172.16.100.0/24 route to the EVBR neighbor over BGP.

    Step 3: Create an Edge Node Service Gateway 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.

      Parameter

      Description

      Example value

      Node

      Select the ENS node on which you want to create the ENSGW.

      mo-taipa-1

      Rate Limit (Mbit/s)

      Set the throttling bandwidth for the ENSGW.

      100

    3. On the instance details page, 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.

      Parameter

      Description

      vSwitch

      Select the ENS vSwitch that you want to add to the EPN instance.

      Note

      You can view ENS vSwitches in the ENS console.

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

    Step 4: Test connection

    Perform the following steps:

    1. On the host with the IP address 172.16.100.1 in the on-premises IDC, open a command-line window.

    2. Run the ping 192.168.200.1 command to ping the ENS instance IP address. A reply message indicates that the on-premises IDC can communicate with the ENS VPC 192.168.200.0/24.