ZyXEL Communications P8802T, Руководство пользователя

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Chapter 4 WAN
Basic Home Station VDSL2 P8802T User’s Guide
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4.6 Technical Reference
The following section contains additional technical information about the VDSL Router features
described in this chapter.
Encapsulation
Be sure to use the encapsulation method required by your ISP. The VDSL Router can work in bridge
mode or routing mode. When the VDSL Router 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 VDSL Router 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.
PPP over Ethernet (PPPoE)
Point-to-Point Protocol over Ethernet (PPPoE) provides access control and billing functionality in a
manner similar to dial-up services using PPP. PPPoE is an IETF standard (RFC 2516) specifying how
a personal computer (PC) interacts with a broadband modem (DSL, cable, wireless, etc.)
connection.
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.
Secondary DNS
server
Enter the second DNS server address assigned by the ISP.
Apply Click Apply to save your changes back to the VDSL Router.
Cancel Click Cancel to return to the previous configuration.
Table 27
3G Backup (continued)
LABEL DESCRIPTION