If our ISP allocates a block public IP addresses for us, then we may use the public IP address with IP Routed Subnet or Routing Usage LAN. This article describes how to use a public iP address with Routing Usage LAN.
Suppose ISP provides a public IP subnet 126.96.36.199/255.255.255.248 for us, and the gateway IP is 188.8.131.52. The public IP addresses we can use are between 184.108.40.206 to 220.127.116.11. The following shows how to set up a non-NAT subnet so that the server behind Vigor Router can use the public IP address 18.104.22.168.
1. Go to LAN >> VLAN,
Enable VLAN Configuration
Set up a VLAN for LAN2 Subnet
Specify the LAN ports that belongs to LAN2 subnet (which is port 5 and 6 in this example), note that these are the ports to which the host should connect
2. Go to LAN >> General Setup, click on Details Page for LAN 2.
3. Set up TCP/IP details for LAN 2,
4. For DHCP Server Configuration, we may either:
After finishing the above configurations, PC or Server that connects to Port 5 or Port 6 with IP settings as IP 22.214.171.124/ mask 255.255.255.252/ Gateway IP 126.96.36.199 will be able to access Internet through Vigor Router.