Related Products

This document will introduce you to network products related to NAT Gateway.

Elastic IP

NAT Gateway and EIP are two ways for CVMs to access the internet. You can choose one or both for the architecture design of your public network access.

Solution 1: Use only a NAT Gateway

The CVM is not bound to an EIP. Traffic accessing the internet is forwarded to the NAT Gateway through the private network and is not subject to the public network bandwidth limit at the time of purchase. The network traffic generated by the NAT Gateway does not occupy the public network bandwidth outlet of the CVM.

Solution 2: Use only an EIP

The CVM is only bound to an EIP and does not use a NAT Gateway. All internet access traffic is transferred out through the EIP and is subject to the public network bandwidth limit at the time of purchase.

Solution 3: Use both a NAT Gateway and an EIP

The CVM is bound to an EIP, and the subnet route accessing the internet traffic points to the NAT Gateway.

• All traffic from CVMs actively accessing the internet is only forwarded to the NAT Gateway through the private network. The return packet also passes through the NAT Gateway and returns to the CVM. This part of the traffic is subject to the public network bandwidth limit at the time of purchase.
• When traffic from the internet actively accesses the EIP of the CVM, the CVM return packets are uniformly returned through the EIP, and the generated public network outbound traffic is subject to the public network bandwidth limit at the time of purchase.
  For more information about EIP, see document Elastic IP Overview.

Other Products

For related product information, see the following table: