Zyxel-communications 70 Series Manual de usuario descargar pdf (Pagina 703)

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ZyWALL 5/35/70 Series User’s Guide

703 Appendix F PPPoE

Figure 440 Single-Computer per Router Hardware Configuration

How PPPoE Works

The PPPoE driver makes the Ethernet appear as a serial link to the computer and the computer

runs PPP over it, while the modem bridges the Ethernet frames to the Access Concentrator

(AC). Between the AC and an ISP, the AC is acting as a L2TP (Layer 2 Tunneling Protocol)

LAC (L2TP Access Concentrator) and tunnels the PPP frames to the ISP. The L2TP tunnel is

capable of carrying multiple PPP sessions.

With PPPoE, the VC (Virtual Circuit) is equivalent to the dial-up connection and is between

the modem and the AC, as opposed to all the way to the ISP. However, the PPP negotiation is

between the computer and the ISP.

ZyWALL as a PPPoE Client

When using the ZyWALL as a PPPoE client, the computers on the LAN see only Ethernet and

are not aware of PPPoE. This alleviates the administrator from having to manage the PPPoE

clients on the individual computers.

Figure 441 ZyWALL as a PPPoE Client

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