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CHAPTER 6
Configuring PPPoE-Based
Radio-to-Router Protocols
PPPoE-Based Radio-to-Router Protocols Overview
Copyright © 2010, Juniper Networks, Inc.
This chapter includes the following topics:
PPPoE-Based Radio-to-Router Protocols Overview on page 35
Configuring PPPoE-Based Radio-to-Router Protocols on page 36
Example: Configuring the PPPoE-Based Radio-to-Router Protocol on page 37
Configuring a Gigabit Ethernet Interface on page 39
Verifying PPPoE Interfaces on page 40
Displaying Statistics for PPPoE on page 41
Credit Flow Control for PPPoE on page 41
Example: PPPoE Credit-Based Flow Control Configuration on page 42
Verifying Credit-Flow Control on page 42
Setting Tracing Options for PPPoE on page 43
Support for PPPoE-based radio-to-router protocols includes the following extensions
to the PPPoE protocol:
Messages that define how an external device provides the router with timely information
about the quality of a link connection
A flow control mechanism that indicates how much data the router can forward
The router uses the information provided in these PPPoE messages to dynamically adjust
the interface speed. When OSPF is notified of this change, it adjusts the cost of the link
and updates the routing tables accordingly.
The radio provides ground-to-ground or ground-to-air communications with like devices.
When the radio picks up a signal from another device, it initiates a PPPoE session with a
directly connected router. The PPPoE session encapsulates the packets that are relayed
over a PPP link between the local and remote routers. The remote radio then forwards
traffic over an independent PPPoE session between the remote radio and the router to
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