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- What's New
- Function Overview
- Service Overview
- Billing
- Getting Started
-
User Guide
- Permissions Management
- Elastic IP
- EIP Billing
- EIP Pool
- Shared Bandwidth
- Shared Data Package
- Global EIPs
- Global Internet Gateways
- Global Internet Bandwidths
- Global Connection Bandwidths
- Cloud Eye Monitoring
- Best Practices
-
API Reference
- Before You Start
- API Overview
- Calling APIs
- APIs
- API V3
- Native OpenStack Neutron APIs V2.0
- Application Examples
- Permissions Policies and Supported Actions
- Appendix
- SDK Reference
-
FAQs
-
Product Consultation
- Managing Quotas
- How Do I Assign or Retrieve a Specific EIP?
- Why Is an EIP Newly Assigned the Same as the One I Released?
- Can I Buy a Specific EIP?
- Does an EIP Change Over Time?
- Why Can't I Find My Purchased EIP on the Management Console?
- What Is the EIP Assignment Policy?
- Can an EIP Be Used or Migrated Across Accounts?
- How Do I Query the Traffic Usage of My EIP?
- Do I Need to Configure a Shared Data Package for Use After It Is Purchased?
- Can I Change the Dedicated Bandwidth Used by an EIP to a Shared Bandwidth?
- How Many ECSs Can I Bind an EIP To?
- What Are the Differences Between EIP, Private IP Address, and Virtual IP Address?
- What Are the Differences Among a Bandwidth Add-On Package, Shared Data Package, and Shared Bandwidth?
- When Should I Use Premium BGP and Are There Any Limitations on Using Premium BGP?
- Why My EIPs Are Frozen? How Do I Unfreeze My EIPs?
-
Billing and Payments
- How Is an EIP Billed?
- How Do I Change My EIP Billing Mode Between Pay-per-Use and Yearly/Monthly?
- How Do I Change the Billing Option of a Pay-per-Use EIP Between By Bandwidth and By Traffic?
- Why Am I Still Being Billed After My EIP Has Been Unbound or Released?
- When Will I Be Billed for Reservation Price?
-
EIP Binding and Unbinding
- How Do I Access an ECS with an EIP Bound from the Internet?
- How Can I Unbind an Existing EIP from an Instance and Bind Another EIP to the Instance?
- Can I Bind an EIP of an ECS to Another ECS?
- Can I Bind an EIP to a Cloud Resource in Another Region?
- Can Multiple EIPs Be Bound to an ECS?
- What Are the Differences Between Unbinding and Releasing an EIP?
-
Bandwidth
- How Do I Increase a Bandwidth to Be More Than 300 Mbit/s?
- What Bandwidth Types Are Available?
- How Many EIPs Can I Add to Each Shared Bandwidth?
- What Are the Differences Between a Dedicated Bandwidth and a Shared Bandwidth?
- What Are Inbound Bandwidth and Outbound Bandwidth?
- How Do I Know If My EIP Bandwidth Has Been Exceeded?
- What Are the Differences Between Public Bandwidth and Private Bandwidth?
- Can I Increase a Yearly/Monthly Bandwidth and Decrease It Later?
- What Is the Relationship Between Bandwidth and Upload/Download Rate?
- What Are the Differences Among Static BGP, Dynamic BGP, and Premium BGP?
-
Connectivity
- What Are the Priorities of the Custom Route and EIP If Both Are Configured for an ECS to Enable the ECS to Access the Internet?
- Why Can't My ECS Access the Internet Even After an EIP Is Bound?
- What Should I Do If an EIP Cannot Be Pinged?
- How Do I Unblock an EIP?
- Why Is There Network Jitter or Packet Loss During Cross-Border Communications?
- Why Does the Download Speed of My ECS Is Slow?
-
Product Consultation
- Videos
- Glossary
-
More Documents
-
User Guide (ME-Abu Dhabi Region)
- Service Overview
- Quick Start
-
Elastic IP
- EIP Overview
- Assigning an EIP and Binding It to an ECS
- Assigning an EIP
- Binding an EIP to an Instance
- Unbinding an EIP from an Instance
- Releasing an EIP
- Changing Dedicated Bandwidth Size of an EIP
- Unbinding an EIP from an ECS and Releasing the EIP
- Modifying an EIP Bandwidth
- Exporting EIP Information
- Managing EIP Tags
- Shared Bandwidth
- Monitoring
-
FAQs
-
Product Consultation
- What Is a Quota?
- How Do I Assign or Retrieve a Specific EIP?
- Why Is an EIP Newly Assigned the Same as the One I Released?
- What Are the Differences Between EIP, Private IP Address, and Virtual IP Address?
- Can an EIP That Uses Dedicated Bandwidth Be Changed to Use Shared Bandwidth?
- Can I Bind an EIP to Multiple ECSs?
- What Are the Differences Between the Primary and Extension NICs of ECSs?
- What Is the EIP Assignment Policy?
- Can I Assign a Specific EIP?
- Can a Bandwidth Be Used by Multiple Accounts?
- How Do I Unbind an EIP from an Instance and Bind a New EIP to the Instance?
- Why Can't I Find My Assigned EIP on the Management Console?
- EIP Binding and Unbinding
-
Bandwidth
- What Is the Bandwidth Size Range?
- How Do I Increase a Bandwidth to Be More Than 300 Mbit/s?
- What Bandwidth Types Are Available?
- Is There a Limit to the Number of EIPs That Can Be Added to Each Shared Bandwidth?
- What Are the Differences Between a Dedicated Bandwidth and a Shared Bandwidth?
- What Are Inbound Bandwidth and Outbound Bandwidth?
- How Do I Know If My EIP Bandwidth Limit Has Been Exceeded?
- What Are the Differences Between Public Bandwidth and Private Bandwidth?
- What Is the Relationship Between Bandwidth and Upload/Download Rate?
- Connectivity
-
Product Consultation
- Change History
- API Reference (ME-Abu Dhabi Region)
-
User Guide (Kuala Lumpur Region)
- Service Overview
- Quick Start
- EIP
- Shared Bandwidth
- Monitoring
-
FAQs
- Product Consultation
- EIP Binding and Unbinding
-
Bandwidth
- What Is the Bandwidth Size Range?
- What Bandwidth Types Are Available?
- Is There a Limit to the Number of EIPs That Can Be Added to Each Shared Bandwidth?
- What Are the Differences Between a Dedicated Bandwidth and a Shared Bandwidth? Can a Dedicated Bandwidth Be Changed to a Shared Bandwidth or the Other Way Around?
- Connectivity
- Change History
- API Reference (Kuala Lumpur Region)
- User Guide (Ankara Region)
- API Reference (Ankara Region)
-
User Guide (ME-Abu Dhabi Region)
- General Reference
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Step 2: Create a Subnet for the VPC
Scenarios
A VPC comes with a default subnet. If the default subnet cannot meet your requirements, you can create one.
A subnet is configured with DHCP by default. When an ECS in this subnet starts, the ECS automatically obtains an IP address using DHCP.
Procedure
- Log in to the management console.
- Click
in the upper left corner and select the desired region and project.
- Click
in the upper left corner and choose Network > Virtual Private Cloud.
The Virtual Private Cloud page is displayed.
- In the navigation pane on the left, choose Virtual Private Cloud > Subnets.
- Click Create Subnet.
The Create Subnet page is displayed.
- Set the parameters as prompted.
Table 1 Parameter descriptions Parameter
Description
Example Value
VPC
The VPC for which you want to create a subnet.
-
AZ
An AZ is a geographic location with independent power supply and network facilities in a region. AZs are physically isolated, and AZs in the same VPC are interconnected through an internal network.
Note the following when you select an AZ:- Subnets in a VPC can be in different AZs. For example, a VPC can have a subnet in AZ 1, and another subnet in AZ 3.
- A cloud resource can be in a different AZ from its subnet. For example, a cloud server in AZ 1 can be in a subnet in AZ 3.
AZ1
Name
The subnet name.
The name can contain a maximum of 64 characters, which may consist of letters, digits, underscores (_), hyphens (-), and periods (.). The name cannot contain spaces.
Subnet
IPv4 CIDR Block
The CIDR block for the subnet. This value must be within the VPC CIDR block.
192.168.0.0/24
IPv6 CIDR Block
Specifies whether to set IPv6 CIDR Block to Enable.
If you select this option, the system automatically assigns an IPv6 CIDR block to the created subnet. Currently, the IPv6 CIDR block cannot be customized. IPv6 cannot be disabled after the subnet is created.
-
Associated Route Table
The default route table to which the subnet will be associated. You can change the route table to a custom route table on the Subnets page.
Default
Gateway
The gateway address of the subnet.
This IP address is used to communicate with other subnets.
192.168.0.1
DNS Server Address
DNS server addresses allow ECSs in a VPC subnet to communicate with each other using private domain names. You can also directly access cloud services through private DNS servers.
If you want to use other public DNS servers for resolution, you can change the default DNS server addresses.
A maximum of two DNS server IP addresses can be configured. Multiple IP addresses must be separated using commas (,).
100.125.x.x
NTP Server Address
The IP address of the NTP server. This parameter is optional.
You can configure the NTP server IP addresses to be added to the subnet as required. The IP addresses are added in addition to the default NTP server addresses. If you do not specify this parameter, no additional NTP server IP addresses will be added.
Enter a maximum of four valid IP addresses, and separate multiple IP addresses with commas. Each IP address must be unique. If you add or change the NTP server addresses of a subnet, you need to renew the DHCP lease for or restart all the ECSs in the subnet to make the change take effect immediately. If the NTP server addresses have been cleared out, restarting the ECSs will not help. You must renew the DHCP lease for all ECSs to make the change take effect immediately.
192.168.2.1
DHCP Lease Time
The period during which a client can use an IP address automatically assigned by the DHCP server. After the lease time expires, a new IP address will be assigned to the client. Unit: Day or hourIf the time period is changed, the new lease time takes effect when the instance (such as an ECS) in the subnet is renewed next time. You can wait for the instance to be renewed automatically or manually modify the lease time. If you want the new lease time to take effect immediately, manually renew the lease or restart the ECS.
-
Tag
The subnet tag, which consists of a key and value pair. You can add a maximum of 10 tags to each subnet.
The tag key and value must meet the requirements listed in Table 2.
- Key: subnet_key1
- Value: subnet-01
Description
Supplementary information about the subnet. This parameter is optional.
The subnet description can contain a maximum of 255 characters and cannot contain angle brackets (< or >).
-
Table 2 Subnet tag key and value requirements Parameter
Requirements
Example Value
Key
- Cannot be left blank.
- Must be unique for each subnet.
- Can contain a maximum of 36 characters.
- Can contain letters, digits, underscores (_), and hyphens (-).
subnet_key1
Value
- Can contain a maximum of 43 characters.
- Can contain letters, digits, underscores (_), periods (.), and hyphens (-).
subnet-01
- Click OK.
Precautions
After a subnet is created, some reserved IP addresses cannot be used. For example, in a subnet with CIDR block 192.168.0.0/24, the following IP addresses are reserved:
- 192.168.0.0: Network ID. This address is the beginning of the private IP address range and will not be assigned to any instance.
- 192.168.0.1: Gateway address.
- 192.168.0.253: Reserved for the system interface. This IP address is used by the VPC for external communication.
- 192.168.0.254: DHCP service address.
- 192.168.0.255: Network broadcast address.
If you configured the default settings under Advanced Settings during subnet creation, the reserved IP addresses may be different from the default ones, but there will still be five of them. The specific addresses depend on your subnet settings.
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