Connecting the Network Through Enterprise Routes

Step 1: Create an Enterprise Route and an Attachment

Create an enterprise router and an attachment to the enterprise router. In this example, vpc-wc is the VPC (network segment: 192.168.0.0/16) to which the CAE environment belongs, and vpc-10 is the VPC on the tenant side (network segment: 10.0.0.0/16).

1. Go to the Enterprise Router console.
2. Click Create Enterprise Router. On the displayed page, set the parameters as follows. For details, see Creating an Enterprise Router.

   Table 1 Parameters for creating an enterprise router

   Parameter	Example Value
   Region	AP-Singapore
   AZ	AZ3
   Enterprise Project	default
   Name	er-878b
   ASN	64513
   Default Route Table Association	Enable
   Default Route Table Propagation	Enable
   Auto Accept Shared Attachments	Disable
   Tag	-
   Description	-

3. Click Create Now > Submit.
4. On the enterprise router page, click er-878b, and click the Attachments tab.
5. On the Attachments tab, click Create Attachment. On the displayed page, set parameters by referring to Table 2 and Table 3. For details, see Creating a VPC Attachment.

   Table 2 Creating a VPC attachment on the tenant side

   Parameter	Example Value
   Name	er-attach-374d
   Attachment Type	VPC
   Attached Resource	VPC: vpc-10 Subnet: wtr-test(10.0.1.0/24)
   Auto Add Routes	Enable
   Advanced Settings-Description	-
   Advanced Settings-Tag	-

   Table 3 Creating a VPC attachment in the CAE environment

   Parameter	Example Value
   Name	er-attach-f855
   Attachment Type	VPC
   Attached Resource	VPC: vpc-wc Subnet: wtr-test(10.0.1.0/24)
   Auto Add Routes	Enable
   Advanced Settings-Description	-
   Advanced Settings-Tag	-

6. Click Create Now.

Step 2: Create a NAT Gateway

Buy a public NAT gateway. The VPC is the VPC to which the CAE environment belongs. In this example, it is vpc-wc.

1. Go to the NAT Gateway console.
2. Click Buy Public NAT Gateway. On the displayed page, set the parameters as follows. For details, see Buying a Public NAT Gateway.

   Table 4 Parameters for buying a public NAT gateway

   Parameter	Example Value
   Region	CN North-Beijing4
   Billing Mode	Select a billing mode.
   Specifications	Select public NAT gateway specifications.
   Name	nat-7a60
   VPC	vpc-wc
   Subnet	cae-subnet
   Enterprise Project	default
   Advanced Settings-Description	-
   Advanced Settings-Tag	-
   Required Duration	Select a duration.

3. Click Next > Pay Now. After the payment is complete, the public NAT gateway is created.

4. In the public NAT gateway list, locate the created gateway nat-7a60 and click Configure Rules in the Operation column.
5. On the SNAT Rules tab, click Add SNAT Rule. In the displayed dialog box, set the parameters as follows. For details, see Adding an SNAT Rule.

   Table 5 Parameters for adding an SNAT rule

   Parameter	Example Value
   Public NAT Gateway Name	nat-7a60
   Scenario	VPC
   CIDR Block	cae-subnet (192.168.0.0/24)
   Public IP Address Type	100.95.154.131
   Monitoring	-
   Description	-

6. Click OK.

Step 3: Create an ECS Node on the Tenant Side

The ECS node created on the tenant side belongs to vpc-10. The EIP of the node is 100.93.0.237, and the private IP address is 10.0.0.80.

1. Go to the ECS console.
2. Click Buy ECS. On the displayed page, set parameters based on service requirements. For details, see Purchasing an ECS.
   NOTE:

   In the Network area, set VPC to the tenant VPC. In this example, the tenant VPC is vpc-10, the EIP of the node is 100.93.0.237, and the private IP address is 10.0.0.80.

3. Click Submit.

Step 4: Create a Route Table and Routes

Add routes to the route table of the VPC (vpc-wc) to which CAE belongs. 10.0.0.0/16 is the private network segment, and 100.93.0.0/16 is the public network segment.

1. Go to the Enterprise Router console.
2. Click the created enterprise router er-878b and click the Route Tables tab.
3. Click Create Route Table and set the following parameters. For details, see Creating a Route Table.

   Table 6 Parameters for creating a route table

   Parameter	Example Value
   Name	rtb-vpc-wc
   Description	-
   Tag	-

4. Click OK.
5. On the Route Tables page, select the created route table rtb-vpc-wc. On the Routes tab, click Create Route. Set the parameters by referring to Table 7 and Table 8. For details, see Creating a Static Route.

   Table 7 Parameters for creating a route (with an enterprise router as the next hop)

   Parameter	Example Value
   Destination	10.0.0.0/16
   Blackhole Route	Disable
   Attachment Type	VPC
   Next Hop	er-878b
   Description	-

   Table 8 Parameters for creating a route (with a NAT gateway as the next hop)

   Parameter	Example Value
   Destination	100.93.0.0/16
   Blackhole Route	Disable
   Attachment Type	VPC
   Next Hop	nat-7a60
   Description	-

6. Click OK.

Step 4: Add the Destination Network Address to the CAE Environment

1. Go to the CAE console.
2. Choose System Settings.
3. Find System Networks and click Edit.
4. Click Add Destination Network Address, select the destination network address with the NAT gateway as the next hop, and click OK to complete the public network route configuration.
5. Click Add Destination Network Address, select the destination network address with the enterprise router as the next hop, and click OK to complete the private network route configuration.