Foundation Summary

Configuration of PPPoE is similar to most other LAN/WAN configurations in that it requires multiple, dependent pieces to be assembled. Only the most basic configuration parameters are discussed in this chapter. Options such as PPP authentication, VPN options, quality of service (QoS), network management, and security are all still on the to-do list with regard to teleworker solution deployments and can be found in detail in the Business Ready Teleworker SRND found at

Table 5-2 is provided to review the basic configuration elements. Table 5-2 PPPoE Configuration Elements



Ethernet interface

Physical interface, typically subscriber-facing but may be both subscriber-

and provider-facing if two exist.

ATM interface

Physical interface, typically provider-facing and carries data traffic to the DSLAM then on to the aggregation router.

Dialer interface

Logical interface bound to a physical interface (usually ATM or second Ethernet) to establish PPPoE session to aggregation router.


Services allowing one-to-one and one-to-many IP address translation capabilities in the CPE router. PAT is also known as NAT with Overload.

Inside local address

Configured IP address assigned to a host on the inside network.

Inside global address

The IP address of an inside host as it appears to the outside network.

Outside local address

The IP address of an outside host as it appears to the inside network.

Outside global address

The configured IP address assigned to a host in the outside network.

DHCP server

Service configured to allocate IP address, gateway, and other relevant information to IP hosts on a particular subnet.

Static default route

A route to a gateway of last resort. In teleworker deployments, no routing protocol is necessary because there is typically only a single subnet. The static default route takes any traffic destined to nonlocal destinations and directs it to the aggregation router.

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