ZyXEL Communications EMG6726-B10A, Руководство пользователя, Страница: 74 / 323

Chapter 6 Broadband
EMG6726/8726-B10A User’s Guide
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6.3 Technical Reference
The following section contains additional technical information about the EMG features described in this
chapter.
Encapsulation
Be sure to use the encapsulation method required by your ISP. The EMG can work in bridge mode or
routing mode. When the EMG 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 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.
By implementing PPPoE directly on the EMG (rather than individual computers), the computers on the
LAN do not need PPPoE software installed, since the EMG does that part of the task. Furthermore, with
NAT, all of the LANs’ computers will have access.
Active Select Enable to enable VLAN on this WAN interface.
802.1p IEEE 802.1p defines up to 8 separate traffic types by inserting a tag into a MAC-layer frame that
contains bits to define class of service.
Select the IEEE 802.1p priority level (from 0 to 7) to add to traffic through this connection. The greater
the number, the higher the priority level.
802.1q Type the VLAN ID number (from 0 to 4094) for traffic through this connection.
OK Click OK to save your changes.
Cancel Click Cancel to exit this screen without saving.
Table 13 Network Setting > Broadband > Add New WAN Interface/Edit (Ethernet-Bridge) (continued)
LABEL DESCRIPTION