CCN connects a VPC with another or with IDCs. This document introduces how to use CCN to interconnect VPCs in Guangzhou and Shanghai regions under the same account.

Background

When creating a CCN instance, you can select either of the billing mode as needed: monthly subscription or monthly 95th percentile pay-as-you-go. The instance creation varies by the billing mode, as shown below:

This document guides you through how to interconnect a VPC in Guangzhou with a VPC in Shanghai under the same account.

Prerequisites

You have created VPCs, subnets and CVMs in Shanghai and Guangzhou regions. The two subnets have no duplicate IP ranges, and CVMs reside in the subnets. For the step-by-step instructions, see Building Up a IPv4 VPC.

Step 1: create a CCN instance

1. Log in to the Virtual Private Cloud Console.

2. Click Cloud Connect Network in the left sidebar to go to the CCN page, and then click +New.

3. In the Create CCN instance dialog box, complete the following configurations, and click OK.

   Field	Subfield	Description
   Name	-	Name of the CCN instance.
   Billing Mode	Monthly subscription	Its unit price is about 20% lower than that of monthly 95th percentile billing. It's applicable to business with stable bandwidth needs.
   	Monthly 95th percentile	Bill the actual bandwidth usage of the current month on 95th percentile basis. It's applicable to business with fluctuating bandwidth demands.
   Service Quality	Platinum	It’s ideal for key businesses that require extremely high communication quality. Gold service is suitable for businesses that require high communication quality, such as payment and game acceleration./td>
   	Gold	It’s suitable for businesses that require transmission of key business data, such as enterprise business data and ERP.
   	Silver	It’s suitable for cost-sensitive and jitter-insensitive businesses that require high security./td>
   Speed Limit Mode	Region outbound speed limit	The overall outbound bandwidth limit from one region to another.
   	Inter-region speed limit	It’s the total bandwidth limit for traffic from a certain region to other regions. A monthly subscription CCN instance only supports the inter-region speed limit.
   Associate with Instance	-	The options include VPC, Direct Connect Gateway, BM Virtual Private Cloud, and VPN Gateway. In this example, we choose to associate with VPC in the Shanghai region.

Step 2: associate a network instance
To associate a VPC in the Guangzhou region with CCN, do as follows:

1. On the CCN page, click the ID/Name of the CCN you want to associate with.
2. On the Associate with Instance page, click Add an instance.
3. In the Associate with Instance dialog box, choose to associate the VPC instance in the Guangzhou region.

Note：

If you need to associate another network instance, click Add.

4. Click OK to add the selected network instances to CCN.

Step 3: check the route table

Check and confirm that routing policies of each subnet in the VPC associated with the CCN take effect. Any IP range conflicts between associated network instances will invalidate routes.

1. On the CCN page, click ID/Name of the CCN instance for which you want to query the route table.
2. Select the Route table tab on the details page of the CCN instance to view its route tables.
3. Check for route in invalid status. If any, modify the route and enable it.
   

##Step 4: configure the bandwidth
-Purchasing bandwidth in both regions (only for monthly subscription CCN instances)
For monthly subscription CCN instances, bandwidth of 10 Kbps or less is free of charge in any region. If you need a higher bandwidth, purchase it according to regions.

1. On the CCN page, click ID/Name of the CCN instance for which you want to purchase a bandwidth.
2. Select the Bandwidth Management tab on the details page of the CCN instance, and click Purchase Bandwidth.
   3. On the Purchase Bandwidth dialog box, choose Guangzhou and Shanghai regions, configure the bandwidth cap and validity period, and click Confirm.

• Setting cross-region bandwidth limit (only for monthly 95th percentile CCN instance)
  You can set the cross-region bandwidth cap for monthly 95th percentile CCN instances as needed:

  Note：

  The default bandwidth cap is 1 Gbps. If you want to increase the bandwidth, submit a ticket.

  • Setting inter-region bandwidth speed limit
    Click Change Bandwidth to go to the Change Bandwidth page. In the pop-up window, select the two regions where you want to limit the bandwidth, and enter the Bandwidth Cap. If you need to add more entries, click Add, and then clickOK to complete the configurations.
  • Setting region outbound bandwidth speed limit
    Click Adjust bandwidth speed limit. In the pop-up window, select regions for which you want to limit the bandwidth on the left, enter the Bandwidth Cap on the right, and click OK to complete the configurations.

Note：

Communications between CCN instances may incur fees. For pricing details, see Pricing.

Result Validation

Log in to a CVM in Shanghai region, and run the ping <IP address> to connect the CVM in Guangzhou region. If the following result appears, the two CVMs are successfully connected.