NAT Gateway Specifications¶
The NAT gateway performance is determined by the maximum number of SNAT connections supported.
Public NAT Gateway¶
An SNAT connection consists of a source IP address, source port, destination IP address, destination port, and a transport layer protocol. The source IP address is the EIP, and the source port is the EIP port. An SNAT connection uniquely identifies a session.
Throughput is the total bandwidth of all EIPs in DNAT rules. For example, a public NAT gateway has two DNAT rules. The EIP bandwidth in the first DNAT rule is 10 Mbit/s, and that in the second DNAT rule is 5 Mbit/s. The throughput of the public NAT gateway will be 15 Mbit/s.
Select a public NAT gateway based on your service requirements. Table 1 lists the public NAT gateway specifications.
Specifications | Maximum Number of SNAT Connections | Bandwidth |
|---|---|---|
Small | 10,000 | 20 Gbit/s |
Medium | 50,000 | 20 Gbit/s |
Large | 200,000 | 20 Gbit/s |
Extra-large | 1,000,000 | 20 Gbit/s |