3.1 Quick Installation Wizard
3.1.1 WAN Parameters
ESG-103 provides three ways to get an IP address in its WAN interface- Fixed IP, DHCP, and PPPoE. There are three radio boxes in this configuration page and you can choose one of which is suitable for your access environment. If you are assigned a Static IP setting in your WAN port by the ISP provider, you have to choose Fixed IP mode and enter the settings, such as the IP address, IP subnet mask, and ISP gateway address, which you can get from the ISP provider. If you have a DHCP server coexisting in your WAN port or your ISP (NSP) provides DHCP services for you, then you can choose DHCP Client mode to acquire an IP address to access the Internet. Most of the ADSL service providers not only provide their customers dedicated IP address but also provide dial-in service. If you apply for dial-in service from your ISP, you can choose PPPoE to access Internet unless your ISP provider does not provide PPPoE as its dial-in solution.
In brief, most ADSL users use PPPoE mode to get an IP from their ISP or NSP and cable modem users use DHCP mode to connect with ISP. Finally, if you ISP or NSP assign you a fixed IP address, you should configure it in Fixed IP mode.
IP Address - This is WAN interface's IP address.
Netmask - This is WAN interface's subnet mask.
Default Gateway - When ESG-103 has no idea where it can forward packets, it deliver those packets to its default gateway.
Chapter 3 Configuration - 9