VSG-1200 User’s Guide

Table 7 System Setting: WAN/LAN: WAN IP (continued)

FIELD

DESCRIPTION

 

 

Use fixed IP address

Select this option to set the VSG to use a static (or fixed) IP address. This is

 

the default setting.

IP Address

Enter the static IP address in dotted decimal notation. The default WAN IP

 

address is 192.168.1.1.

Subnet Mask

Enter the subnet mask in dotted decimal notation.

 

 

Default IP Gateway

Enter the IP address of the default gateway device.

 

 

Primary/Secondary

Enter the IP addresses of the primary and/or secondary DNS servers.

DNS Server

 

MTU Setting

Enter the MTU (Maximum Transfer Unit) size.

 

 

4.7.4 PPPoE

Point-to-Point Protocol over Ethernet (PPPoE) functions as a dial-up connection. PPPoE is an IETF (Internet Engineering Task Force) draft standard specifying how a host personal computer interacts with a broadband modem (for example DSL, cable, wireless, etc.) to achieve access to high-speed data networks. It preserves the existing Microsoft Dial-Up Networking experience and requires no new learning or procedures.

For the service provider, PPPoE offers an access and authentication method that works with existing access control systems (for instance, RADIUS). For the user, PPPoE provides a login and authentication method that the existing Microsoft Dial-Up Networking software can activate, and therefore requires no new learning or procedures for Windows users.

One of the benefits of PPPoE is the ability to let end users access one of multiple network services, a function known as dynamic service selection. This enables the service provider to easily create and offer new IP services for specific users.

Operationally, PPPoE saves significant effort for both the subscriber and the ISP/carrier, as it requires no specific configuration of the broadband modem at the subscriber’s site.

By implementing PPPoE directly on the VSG (rather than individual computers), the computers on the LAN do not need PPPoE software installed, since the VSG does that part of the task. Furthermore, with NAT, all of the LAN's computers will have Internet access.

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Chapter 4 LAN, WAN and Server Setup