SDP, SBW and NAT Gateway can be used in the scenario where multiple devices share the same network.

For specific use and option, refer to the following principles:

SDP

An SDP applies to the scenarios in which the bandwidth fluctuates and the traffic is low. When the traffic surges, each EIP can ensure an exclusive bandwidth. Different from shared bandwidth, users using SDPs do not have to worry about the sudden increase of traffic resulting in reduction of the speed.

Shared Bandwidth

Shared bandwidth applies to the scenarios in which the bandwidth fluctuates and the traffic is high. When the traffic surges, EIPs share one bandwidth line, which cannot guarantee that the bandwidth of a specific EIP is not affected. Different from an SDP, since shared bandwidth is charged as per bandwidth use, users do not have to worry about the long surge of traffic resulting in soaring costs.

NAT Gateway

An NAT gateway applies to scenarios in which low bandwidth is required and the cost is further is reduced. To use an NAT gateway, you need only one EIP to meet the requirements of multiple ECSs for accessing and being accessed by the Internet. The bandwidth of all ECSs under an NAT gateway is also shared, which is applicable to scenarios in which ECSs only need to have basic access to network or be accessed by the network and is inapplicable to scenarios in which high and stable bandwidth is required.

An EIP that is bound to an NAT gateway can also be added to the shared bandwidth for unified billing or be billed from the SDP.

Combination of Network Products on Demand

If a device needs an independent and stable network environment and none of the above products meets the requirement, an independent EIP is the best choice for the user.

There are no absolutely applicable scenarios for the above network products. Users should flexibly opt for and combine the products according to business requirements. ECSs can be grouped for management by making the ECSs with similar service characteristics use the same network bandwidth product, so as to attain the optimal service at the lowest cost.

Elastic IP

Select SDP, SBW or NAT Gateway