Chapter 5 WAN Setup
VMG1312-T10C User’s Guide
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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.
5.5.1.2 PPP over Ethernet
The Device supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE specifies how a personal
computer (PC) interacts with a broadband modem (DSL, cable, wireless, etc.) connection. The
PPPoE option provides 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).
PPPoE lets 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 Device (rather than individual computers), the computers on
the LAN do not need PPPoE software installed, since the Device does that part of the task.
Furthermore, with NAT, all of the LANs’ computers will have access.
5.5.1.3 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 Device encapsulates the PPP session based on RFC
1483 and sends it through an ATM PVC (Permanent Virtual Circuit) to the Internet Service
Provider’s (ISP) DSLAM (Digital Subscriber Line (DSL) Access Multiplexer). Please refer to RFC 2364
for more information on PPPoA. Refer to RFC 1661 for more information on PPP.
5.5.1.4 RFC 1483
RFC 1483 describes two methods for Multiprotocol Encapsulation over ATM Adaptation Layer 5
(AAL5). The first method allows multiplexing of multiple protocols over a single ATM virtual circuit
(LLC-based multiplexing) and the second method assumes a separate ATM virtual circuit (VC-based
multiplexing) carries each protocol. Please refer to RFC 1483 for more detailed information.
5.5.2 Multiplexing
There are two conventions to identify what protocols the virtual circuit (VC) carries. Use the
multiplexing method required by your ISP.
VC-based Multiplexing
In this case, by prior mutual agreement, each protocol uses a specific virtual circuit; for example,
VC1 carries IP, etc. VC-based multiplexing may be dominant in environments where dynamic
creation of large numbers of ATM VCs is fast and economical.
Summary of Contents for VMG1312-T10C
Page 4: ...Contents Overview VMG1312 T10C User s Guide 4 ...
Page 12: ...Table of Contents VMG1312 T10C User s Guide 12 ...
Page 13: ...13 PART I User s Guide ...
Page 14: ...14 ...
Page 20: ...Chapter 1 Introduction VMG1312 T10C User s Guide 20 ...
Page 28: ...28 ...
Page 34: ...Chapter 4 Connection Status and System Info VMG1312 T10C User s Guide 34 ...
Page 106: ...Chapter 7 Home Networking VMG1312 T10C User s Guide 112 ...
Page 144: ...Chapter 13 Filter VMG1312 T10C User s Guide 152 ...
Page 164: ...Chapter 15 Parental Control VMG1312 T10C User s Guide 172 ...
Page 172: ...Chapter 16 Certificates VMG1312 T10C User s Guide 180 ...
Page 178: ...Chapter 17 System Monitor VMG1312 T10C User s Guide 186 ...
Page 180: ...Chapter 18 User Account VMG1312 T10C User s Guide 188 ...
Page 184: ...Chapter 20 System VMG1312 T10C User s Guide 192 ...
Page 190: ...Chapter 22 Log Setting VMG1312 T10C User s Guide 198 ...
Page 196: ...Chapter 24 Backup Restore VMG1312 T10C User s Guide 204 ...
Page 214: ...Chapter 26 Diagnostic VMG1312 T10C User s Guide 222 ...
Page 232: ...Appendix B Legal Information VMG1312 T10C User s Guide 240 ...