Chapter 8 Broadband
AX/DX/EX/PX Series User’s Guide
232
Figure 105 Network Setting > Broadband > Backup WAN
The following table describes the fields in this screen.
8.7 Technical Reference
The following section contains additional technical information about the Zyxel Device features
described in this chapter.
Encapsulation
Be sure to use the encapsulation method required by your ISP. The Zyxel Device can work in bridge
mode or routing mode. When the Zyxel Device is in routing mode, it supports the following methods.
IP over Ethernet
IP over Ethernet (IPoE) is an alternative to PPPoE. IP packets are being delivered across an Ethernet
network, without using PPP encapsulation. They 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 Ethernet cells.
PPP over ATM (PPPoA)
PPPoA stands for Point to Point Protocol over ATM Adaptation Layer 5 (AAL5). A PPPoA connection
functions like a dial-up Internet connection. The Zyxel Device encapsulates the PPP session based on
RFC1483 and sends it through an ATM PVC (Permanent Virtual Circuit) to the Internet Service Provider’s
(ISP) DSLAM (digital access multiplexer). Please refer to RFC 2364 for more information on PPPoA. Refer
to RFC 1661 for more information on PPP.
Table 53 Network Setting > Broadband > Backup WAN
LABEL DESCRIPTION
State: Click this switch to enable backup WAN to have the LAN/WAN port act as an Ethernet WAN port.
Otherwise, the LAN/WAN port remains as a LAN port.
Cancel Click Cancel to exit this screen without saving any changes.
Apply Click Apply to save your changes.
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