Configuring PPPoE

To configure PPPoE on a J-series Services Router, perform the following tasks:

1. Configure PPPoE encapsulation for an Ethernet interface or Ethernet over ATM encapsulation for an ATM-over-ADSL interface.
2. If you are configuring ATM over ADSL, configure LLC encapsulation on the logical interface.
3. Specify the logical Ethernet interface or the logical ATM interface as the underlying interface for the PPPoE session.
4. Configure the operational mode as client.
5. Identify the access concentrator by a unique name.
6. Optionally, specify how many seconds to wait before attempting to reconnect.
7. Provide a name for the type of service provided by the access concentrator.
8. Optionally, configure the maximum transmission unit (MTU) of the interface.
9. Configure the PPPoE interface address.
10. Configure the destination PPPoE interface address.
11. Optionally, configure the MTU size for the protocol family.
12. Optionally, disable the sending of keepalive messages on the logical interface.

To configure PPPoE on an M120 Internet Router operating as an access concentrator, perform the following tasks:

1. Configure PPPoE encapsulation for an Ethernet interface.
2. Specify the logical Ethernet interface as the underlying interface for the PPPoE session.
3. Optionally, configure the maximum transmission unit (MTU) of the interface.
4. Configure the operational mode as server.
5. Configure the PPPoE interface address.
6. Configure the destination PPPoE interface address.
7. Optionally, configure the MTU size for the protocol family.

Setting the Appropriate Encapsulation on the PPPoE Interface

For PPPoE on an Ethernet interface, you must configure encapsulation on the logical interface and use PPP over Ethernet encapsulation.

For PPPoE on an ATM-over-ADSL interface, you must configure encapsulation on both the physical and logical interfaces. To configure encapsulation on an ATM-over-ADSL physical interface, use Ethernet over ATM encapsulation. To configure encapsulation on an ATM-over-ADSL logical interface, use PPPoE over AAL5 LLC encapsulation. LLC encapsulation allows a single ATM virtual connection to transport multiple protocols.

Note: PPPoE encapsulation is not supported on an M120 router on an ATM2 IQ interface.

When you configure a point-to-point encapsulation such as PPP on a physical interface, the physical interface can have only one logical interface (only one unit statement) associated with it.

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

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

You can include this statement at the following hierarchy levels:

• [edit interfaces interface-name unit logical-unit-number]
• [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number]

Perform the task appropriate for the interface on which you are using PPPoE:

• Configuring PPPoE Encapsulation on an Ethernet Interface
• Configuring PPPoE Encapsulation on an ATM-over-ADSL Interface

Configuring a PPPoE Interface

The following sections describe how to configure a PPPoE interface:

• Configuring the PPPoE Underlying Interface
• Identifying the Access Concentrator
• Configuring the PPPoE Automatic Reconnect Wait Timer
• Configuring the PPPoE Service Name
• Configuring the PPPoE Server Mode
• Configuring the PPPoE Client Mode
• Configuring the PPPoE Source and Destination Addresses
• Deriving the PPPoE Source Address From a Specified Interface
• Configuring the PPPoE IP Address by Negotiation
• Configuring the Protocol MTU PPPoE
• Example: Configuring a PPPoE Client Interface on a J-Series Services Router
• Example: Configuring a PPPoE Server Interface on an M120 Router

Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice.