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Help Center/ Virtual Private Cloud/ User Guide (Kuala Lumpur Region)/ VPC Peering Connection/ Creating a VPC Peering Connection with Another VPC in Your Account

Creating a VPC Peering Connection with Another VPC in Your Account

Updated on 2024-04-11 GMT+08:00

Scenarios

If two VPCs from the same region cannot communicate with each other, you can use a VPC peering connection. This section describes how to create a VPC peering connection between two VPCs in the same account.

This following describes how to create a VPC peering connection between VPC-A and VPC-B in account A to enable communications between ECS-A01 and RDS-B01.

Procedure:

Step 1: Create a VPC Peering Connection

Step 2: Add Routes for the VPC Peering Connection

Step 3: Verify Network Connectivity

Figure 1 Networking diagram of a VPC peering connection between VPCs in the same account

Notes and Constraints

  • Only one VPC peering connection can be created between two VPCs at the same time.
  • A VPC peering connection can only connect VPCs in the same region.
  • If the local and peer VPCs have overlapping CIDR blocks, the VPC peering connection may not take effect.

Prerequisites

You have two VPCs from the same account in the same region. If you want to create one, see Creating a VPC.

Step 1: Create a VPC Peering Connection

  1. Log in to the management console.
  1. Click in the upper left corner and choose Network > Virtual Private Cloud.

    The Virtual Private Cloud page is displayed.

  2. In the navigation pane on the left, choose Virtual Private Cloud > VPC Peering Connections.

    The VPC peering connection list is displayed.

  3. In the upper right corner of the page, click Create VPC Peering Connection.

    The Create VPC Peering Connection dialog box is displayed.

  4. Configure the parameters as prompted.

    For details, see Table 1.

    Table 1 Parameters for creating a VPC peering connection

    Parameter

    Description

    Example Value

    VPC Peering Connection Name

    Mandatory

    Enter a name for the VPC peering connection.

    The name can contain a maximum of 64 characters, including letters, digits, hyphens (-), and underscores (_).

    peering-AB

    Local VPC

    Mandatory

    VPC at one end of the VPC peering connection. You can select one from the drop-down list.

    VPC-A

    Local VPC CIDR Block

    CIDR block of the selected local VPC

    172.16.0.0/16

    Account

    Mandatory

    • Options: My account and Another account
    • Select My account.

    My account

    Peer Project

    The system fills in the corresponding project by default because My account is set to Account.

    For example, if VPC-A and VPC-B are in account A and region A, the system fills in the correspond project of account A in region A by default.

    ab-cdef-1

    Peer VPC

    This parameter is mandatory if Account is set to My account.

    VPC at the other end of the VPC peering connection. You can select one from the drop-down list.

    VPC-B

    Peer VPC CIDR Block

    CIDR block of the selected peer VPC

    If the local and peer VPCs have overlapping CIDR blocks, the VPC peering connection may not take effect. For details, see VPC Peering Connection Usage Examples.

    172.17.0.0/16

    Description

    Optional

    Enter the description of the VPC peering connection in the text box as required.

    peering-AB connects VPC-A and VPC-B.

  5. Click OK.

    A dialog box for adding routes is displayed.

  6. In the displayed dialog box, click Add Now. On the displayed Local Routes page, go to Step 2: Add Routes for the VPC Peering Connection to add a route.

Step 2: Add Routes for the VPC Peering Connection

To enable communications between VPCs connected by a VPC peering connection, you need to add forward and return routes to the route tables of the VPCs. For details, see VPC Peering Connection Usage Examples.

  1. Add routes to the route table of the local VPC:
    1. On the Local Routes tab of the VPC peering connection, click the Route Tables hyperlink.

      The Summary tab of the default route table for the local VPC is displayed.

    2. Click Add Route.

      Table 2 describes the route parameters.

      Table 2 Parameter description

      Parameter

      Description

      Example Value

      Destination

      The peer VPC CIDR block, subnet CIDR block, or ECS IP address. For details, see VPC Peering Connection Usage Examples.

      VPC-B CIDR block: 172.17.0.0/16

      Next Hop Type

      The next hop type. Select VPC peering connection.

      VPC peering connection

      Next Hop

      The next hop address. Select the name of the current VPC peering connection.

      peering-AB

      Description

      Supplementary information about the route. This parameter is optional.

      The route description can contain a maximum of 255 characters and cannot contain angle brackets (< or >).

      -

    3. Click OK.

      You can view the route in the route list.

  1. Add routes to the route table of the peer VPC:
    1. On the Peer Routes tab of the VPC peering connection, click the Route Tables hyperlink.

      The Summary tab of the default route table for the peer VPC is displayed.

    2. Click Add Route.

      Table 3 describes the route parameters.

      Table 3 Parameter description

      Parameter

      Description

      Example Value

      Destination

      The local VPC CIDR block, subnet CIDR block, or ECS IP address. For details, see VPC Peering Connection Usage Examples.

      VPC-A CIDR block: 172.16.0.0/16

      Next Hop Type

      The next hop type. Select VPC peering connection.

      VPC peering connection

      Next Hop

      The next hop address. Select the name of the current VPC peering connection.

      peering-AB

      Description

      Supplementary information about the route. This parameter is optional.

      The route description can contain a maximum of 255 characters and cannot contain angle brackets (< or >).

      -

    3. Click OK.

      You can view the route in the route list.

Step 3: Verify Network Connectivity

After you add routes for the VPC peering connection, verify the communication between the local and peer VPCs.
  1. Log in to ECS-A01 in the local VPC.
  2. Check whether ECS-A01 can communicate with RDS-B01.

    ping IP address of RDS-B01

    Example command:

    ping 172.17.0.21

    If information similar to the following is displayed, ECS-A01 and RDS-B01 can communicate with each other, and the VPC peering connection between VPC-A and VPC-B is successfully created.
    [root@ecs-A02 ~]# ping 172.17.0.21
    PING 172.17.0.21 (172.17.0.21) 56(84) bytes of data.
    64 bytes from 172.17.0.21: icmp_seq=1 ttl=64 time=0.849 ms
    64 bytes from 172.17.0.21: icmp_seq=2 ttl=64 time=0.455 ms
    64 bytes from 172.17.0.21: icmp_seq=3 ttl=64 time=0.385 ms
    64 bytes from 172.17.0.21: icmp_seq=4 ttl=64 time=0.372 ms
    ...
    --- 172.17.0.21 ping statistics ---
    NOTICE:

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