Application Scenarios for PPP

Application Environment

When a FW functions as the enterprise egress gateway, the LAN-side interface connects to a host on the intranet and the WAN-side interface connects to a carrier's device. The carrier's device can be a digital subscriber line access multiplexer (DSLAM), an optical line terminal (OLT), or a wireless base station, depending on the WAN-side interface type.

Typical Application

PPP can be used in the following scenarios:

• FW_A connects to the WAN-side interface of FW_B using a PPP link. FW_A obtains the IP address allocated by a carrier's device, through IPCP negotiation in the PPP link establishment process, and connects to the WAN. PPP links are widely used for communication between enterprise branches and the headquarters.

  Figure 1 Communication over a PPP link
  

• PPP can be used with other technologies to provide various services. such as PPPoE.