What Is EIP - EIP | Huawei Cloud

User Guide

Elastic IP

EIP Billing

Shared Bandwidth

Shared Data Package

Monitoring

Permissions Management
Best Practices

Public Network Access

Lower Network Costs

On-premises Data Centers

Documentation

What Is EIP?

Getting to Know
Getting Started
Best Practices
API Reference
SDK Overview

The Elastic IP (EIP) service enables your cloud resources to communicate with the internet using static public IP addresses and scalable bandwidths. EIPs can be bound to or unbound from ECSs, BMSs, virtual IP addresses, NAT gateways, or load balancers.

Advantages

EIPs can be flexibly bound to or unbound from ECSs, BMSs, NAT gateways, load balancers, or virtual IP addresses. The bandwidth can be scaled according to service changes.

Application Scenarios

You can bind an EIP to an ECS to enable the ECS to access the Internet.

Functions

Notes and Constraints

Billing

The EIP service provides multiple billing modes.

Getting Started

Quick Start

This document describes how to assign an EIP and bind it to an ECS to allow the ECS to access the Internet.

Assigning an EIP and Binding It to an ECS

Best Practices

Public Network Access

Cloud services, such as EIP, NAT Gateway, and ELB can be used to connect to the Internet.

Lower Network Costs

You can select a proper product and billing mode based on your service requirements.

On-premises Data Centers Providing Internet-Accessible Services Using IPv6 EIPs

You can use the IPv6 function of the EIP service to map existing IPv4 EIPs into IPv6 EIPs. After the IPv6 EIP function is enabled, you will obtain both an IPv4 EIP and its corresponding IPv6 EIP. External IPv6 addresses can access cloud resources through this IPv6 EIP.

API Reference

Before You Start

The EIP service provides independent public IP addresses and bandwidth for Internet access. EIPs can be bound to or unbound from ECSs, BMSs, virtual IP addresses, load balancers, and NAT gateways. Various billing modes are provided to meet diverse service requirements.

API Calling

EIP supports Representational State Transfer (REST) APIs, allowing you to call APIs using HTTPS. For details about API calling, see Calling APIs.

Making an API Request

This section describes the structure of a REST API request, and uses the IAM API for obtaining a user token as an example to demonstrate how to call an API. The obtained token can then be used to authenticate the calling of other APIs.

Application Examples

This section describes how to bind an EIP to an ECS by calling APIs.

Permissions Policies and Supported Actions

This section describes fine-grained permissions management for your EIPs. If your account does not need individual IAM users, then you may skip over this section.

Appendix

This section describes monitoring metrics reported by VPC to Cloud Eye as well as their namespaces and dimensions. You can use APIs provided by Cloud Eye to query the monitoring metrics of the monitored object and alarms generated for VPC.

SDK Overview

Java

Java SDK User Guide

Python

Python SDK User Guide

Go SDK User Guide

.NET

.Net SDK User Guide

FAQ

How Do I Assign or Retrieve a Specific EIP?

If you want to retrieve an EIP that you have released or assign a specific EIP, you can use APIs. When assigning an EIP, set the value of ip_address to the IP address that you want to assign. For details, see Elastic IP API Reference.
Why Is an EIP Newly Assigned the Same as the One I Released?

If you have released EIPs, the system preferentially assigns EIPs from the ones you released in the last 24 hours.
If you do not want an EIP that you have released, assign an EIP first and then release the one that you do not want.
You can assign a specific EIP by calling APIs. For details, see Elastic IP API Reference.
Can an EIP That Uses Dedicated Bandwidth Be Changed to Use Shared Bandwidth?

Yes. A pay-per-use EIP that uses the dedicated bandwidth can be changed to use the shared bandwidth. However, a yearly/monthly EIP that uses the dedicated bandwidth cannot be changed to use the shared bandwidth.
Can I Bind an EIP to Multiple ECSs?

Each EIP can be bound to only one ECS at a time.
Multiple ECSs cannot share the same EIP. An ECS and its bound EIP must be in the same region. If you want multiple ECSs in the same VPC to share an EIP, you have to use a NAT gateway. For more information, see NAT Gateway User Guide.
Can I Buy a Specific EIP?

By default, EIPs are assigned randomly. If you have released EIPs, the system preferentially assigns EIPs from the ones you released.
You can assign a specific EIP only by calling an API. For details, see Assigning an EIP.
When Am I Being Billed for an EIP?

Yearly/monthly EIP: will not be billed.
Pay-per-use EIP:
will not be billed if the EIP is bound to an instance.
will be billed if the EIP is not bound to an instance and is not released.
Can I Bind an EIP to an ECS, to Another ECS?

Yes.
You can unbind the EIP from the original ECS. For details, see Unbinding an EIP from an Instance.
Then, bind the EIP to the target ECS. For details, see Binding an EIP to an Instance.
If you want to change an EIP for your ECS, refer to Changing an EIP.
Can I Bind an EIP to a Cloud Resource in Another Region?

No. EIPs and their associated cloud resources must be in the same region.
How Do I Unblock an EIP?

When the bandwidth of an EIP exceeds the threshold or an attack (usually a DDoS attack) occurs, the EIP will be blocked.
Blocked EIPs will be automatically unblocked 24 hours later if no attack occurs. You can use Advanced Anti-DDoS to defend against attacks.
If the blocked EIP is continuously attacked, assign a new EIP and release the blocked one.
Can Multiple EIPs Be Bound to an ECS?

Multiple EIPs can be bound to an ECS, but this operation is not recommended.
If you really need to bind multiple EIPs to an ECS, you must manually configure routing policies, which requires high network skills. Exercise caution when performing this operation.

Videos

Elastic IP Service Introduction

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Creating VPC for Accessing the Internet Using EIP

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Creating VPC for Accessing the Internet Using EIP

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Creating VPC for Accessing the Internet Using EIP

What Is EIP?

What Is EIP?

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