Configuring Point-to-Point Protocol over Ethernet

The Point-to-Point Protocol over Ethernet (PPPoE) connects multiple hosts on an Ethernet LAN to a remote site through a single customer premises equipment (CPE) device—a J-series Services Router. Hosts share a common digital subscriber line (DSL), a cable modem, or a wireless connection to the Internet. To use PPPoE, you must configure the Services Router as a PPPoE client, encapsulate PPP packets over Ethernet, and initiate a PPPoE session.

NOTE: J4300 and J6300 Services Routers with asymmetrical DSL (ADSL) Physical Interface Modules (PIMs) and symmetrical high-speed DSL (SHDSL) PIMs can use PPPoE over Asynchronous Transfer Mode (ATM) to connect through DSL lines only, not for direct ATM connections. For information about configuring ADSL and SHDSL interfaces, see Configuring ATM-over-ADSL Interfaces and Configuring ATM-over-SHDSL Interfaces.

To configure physical interface properties, include the encapsulation statement at the [edit interfaces interface-name] hierarchy level:

[edit interfaces interface-name]

    encapsulation ethernet-over-atm;

To configure logical interface encapsulation properties, include the encapsulation statement:

encapsulation ppp-over-ether;

You can include this statement at the following hierarchy levels:

• [edit interfaces interface-name unit logical-unit-number]
• [edit logical-routers logical-router-name interfaces interface-name unit logical-unit-number]

To configure PPPoE session properties, include the underlying-interface statement at the [edit interfaces interface-name unit logical-unit-number pppoe-options] hierarchy level:

[edit interfaces interface-name}

unit logical-unit-number;

    pppoe-options {

        underlying-interface interface-name;

        encapsulation ppp-over-ether;

    {

{

To configure additional PPPoE session properties, include the access-concentrator 
statement, auto-reconnect statement, and service statement to specify the access 
concentrator, type of service provided by the access concentrator, and the 
reconnection time:

unit logical-unit-number 

    pppoe-options {

        access-concentrator name;

        auto-reconnect seconds;

        service-name name;

        }

    }

}

To configure the PPPoE interface source and destination address, do one of the following:

• Include the address and destination statements:

address address destination address;

• Include the unnumbered-address and destination statements to derive the source address from a specified interface:

unnumbered-address interface-name destination address;

• Include the negotiate-address statement to obtain an IP address by negotiation with the remote end:

negotiate-address;

You can include these statements at the following hierarchy levels:

• [edit interfaces pp0.0 family inet]
• [edit logical-routers logical-router-name interfaces pp0.0 family inet]

To configure the maximum transmission unit (MTU) of the protocol, include the mtu statement at the [edit interfaces pp0] hierarchy level:

[edit interfaces pp0]

mtu bytes;

To disable the sending of keepalives on a logical interface, include the no-keepalives statement:

no-keepalives;

You can include this statement at the following hierarchy levels:

• [edit interfaces pp0.0 unit logical-unit-number]
• [edit logical-routers logical-router-name interfaces pp0 unit logical-unit-number]

This chapter includes the following topics:

• PPPoE Overview
• Configuring PPPoE
• Verifying a PPPoE Configuration