FAQs about EIP

What is EIP?

Elastic IP (EIP) is a public network IP address that can be independently applied for. An EIP can only be bound to a KEC instance, an SLB instance, or an EPC instance in the same region. EIPs support dynamic binding and unbinding.

When do I need to buy an EIP?

If your VPC-type KEC instance needs to access the public network, you need to buy an EIP or public network NAT.

What types of instances does EIP support?

EIPs can be bound to KEC instances, SLB instances, or EPC instances.

Can a single KEC instance be bound to several EIPs?

No. A single KEC instance can be bound to only one EIP.

Can EIPs be used across regions?

No. EIPs cannot be used across regions. An EIP can be bound to any KEC instance, SLB instance, or EPC instance in the same region under your account.

Is there any limit on the times EIPs are bound or unbound each day?

There is no limit.

If an EIP is not bound after it is applied, will any fee be charged?

To improve the utilization of public IP addresses, Kingsoft Cloud charges a fee for EIP usage. After you buy an EIP, the fee is charged based on the specified billing mode even if the EIP is not bound for use.

Is real-name authentication the precondition for buying an EIP?

You must pass real-name authentication before you apply for an EIP.

Is there any alert for expiration of an EIP? Will an EIP be released if it expires?

There will be SMS and email alerts when an EIP expires. The EIP will be disabled for 7 days before it is released.

What is the rate limiting policy for EIP?

In principle, Kingsoft Cloud allocates to users an inbound public bandwidth that equals to the purchased outbound bandwidth. However, the actual inbound bandwidth is generally lower than the outbound bandwidth. Therefore, in an availability zone, if the overall inbound bandwidth is lower than the outbound bandwidth, Kingsoft Cloud will lift the limit on users' inbound bandwidth to allow a certain amount of overflow to enhance user experiences. If the bandwidth purchased is less than 50 Mbit/s, the allowed inbound bandwidth can be up to 50 Mbit/s. If the bandwidth purchased is greater than or equal to 50 Mbit/s, the allowed inbound bandwidth equals to the purchased outbound bandwidth.

In the availability zone, when the overall inbound bandwidth is greater than the outbound bandwidth, Kingsoft Cloud will limit the users' inbound bandwidth, with limitations imposed first on the users with extreme gaps between their inbound and outbound bandwidth.

How do I troubleshoot the problem if an EIP cannot be accessed?

You can check whether the resource bound with the EIP has a security policy. For example, if a security group policy is configured to prohibit access to port 8080, the port 8080 of the EIP cannot be accessed.