NAT Easy IP and a GRE Tunnel Sharing an Interface IP Address
Service Overview
Public IP addresses on the Internet are limited. Especially on enterprise networks, enterprise users cannot obtain sufficient IP addresses. To conserve public IP address resources, interface addresses on the public network side can be used as both source addresses of GRE tunnels and public IP addresses of NAT Easy IP. In this way, both the GRE and NAT services can be deployed on the network.
Networking Description
As shown in Figure 1, GRE traffic from the user to the public network's server 1 and NAT traffic from the user to the public network's server 2 share the IP address of interface 1 on the public network side as a source IP address. GRE traffic from the public network's server 1 to the user and NAT traffic from the public network's server 2 to the user share the IP address of interface 1 on the public network side as a destination IP address.
Feature Deployment
- Configure the NAT service on the NAT device. Enable the Easy IP function to reuse the public network-side interface's IP address in a NAT address pool.
- Create a GRE tunnel between the NAT device and Device. Use the public network-side interface's IP address as the source IP address of the GRE tunnel.
Simplified NAT instance scenarios are supported.