Wan Technical Reference; Encapsulation - ZyXEL Communications AMG1302-T series User Manual

Chapter 6 Broadband
Table 15 Network Setting > Broadband > More Connections: Edit: Advanced Setup (continued)
LABEL
MTU
Apply
Cancel

6.4 WAN Technical Reference

This section provides some technical background information about the topics covered in this
chapter.

6.4.1 Encapsulation

Be sure to use the encapsulation method required by your ISP. The AMG1302/AMG1202-TSeries
supports the following methods.
6.4.1.1 ENET ENCAP
The MAC Encapsulated Routing Link Protocol (ENET ENCAP) is only implemented with the IP
network protocol. IP packets are routed between the Ethernet interface and the WAN interface and
then formatted so that they can be understood in a bridged environment. For instance, it
encapsulates routed Ethernet frames into bridged ATM cells. ENET ENCAP requires that you specify
a gateway IP address in the Gateway IP Address field in the wizard or WAN screen. You can get
this information from your ISP.
6.4.1.2 PPP over Ethernet
The AMG1302/AMG1202-TSeries supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is
an IETF Draft standard (RFC 2516) specifying how a personal computer (PC) interacts with a
broadband modem (DSL, cable, wireless, etc.) connection. The PPPoE option is for a dial-up
connection using PPPoE.
For the service provider, PPPoE offers an access and authentication method that works with existing
access control systems (for example RADIUS).
One of the benefits of PPPoE is the ability to let you 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 individuals.
Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as it requires no
specific configuration of the broadband modem at the customer site.
By implementing PPPoE directly on the AMG1302/AMG1202-TSeries (rather than individual
computers), the computers on the LAN do not need PPPoE software installed, since the AMG1302/
86
DESCRIPTION
The Maximum Transmission Unit (MTU) defines the size of the largest packet allowed on an
interface or connection. Enter the MTU in this field.
For ENET ENCAP, the MTU value is 1500.
For PPPoE, the MTU value is 1492.
For PPPoA and RFC, the MTU is 100-1500.
Click this to save your changes.
Click this to restore your previously saved settings.
AMG1302/AMG1202-TSeries User's Guide