Configuring Point-To-Point Protocol Over Ethernet; Session; Pppoe Service Name Tables - Juniper JUNOSE SOFTWARE 11.2.X - LINK LAYER CONFIGURATION GUIDE 7-7-2010 Configuration Manual

PPPoE Service Name Tables

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The host sends a unicast PPPoE Active Discovery Request (PADR) packet to the AC
3.
to which it wants to connect.
The selected AC sends a PPPoE Active Discovery Session (PADS) packet to confirm
4.
the session.

Session

When Discovery is successfully completed, both the host and the selected remote AC
have the information they need to build their point-to-point connection over Ethernet.
The only parameter that you can configure is the number of PPPoE sessions.
NOTE: The router supports dynamic PPPoE interfaces. Also, profiles support PPPoE
interfaces. See "Configuring Dynamic Interfaces" on page 511 and "Configuring Dynamic
Interfaces Using Bulk Configuration" on page 619, for more information.
PPPoE clients use service name tags, as defined in RFC 2516, to request that an AC
support certain services. The client includes a custom service name tag in the PADI packet
that it broadcasts to remote ACs. Alternatively, the client can include an empty service
name tag of zero length to indicate that any service is acceptable, or an unknown service
name tag to represent a service not yet configured in the PPPoE service name table.
On receipt of a PADI packet that it can serve, the AC responds with a PADO packet. The
PADO packet contains a service name tag that is identical to the one in the PADI, as well
as one or more additional service name tags indicating other services that the AC offers.
A PPPoE service name table consists of one or more service name entries and their
associated action. The PPPoE service name table can include three types of service name
tags:
Custom service name tag (serviceName) — A service entry that represents a specific
client service that an AC can support. The length of the custom service name tag can
be up to 31 alphanumeric characters; for example, myQoSClass or my ISPService. You
can optionally associate an action (drop or terminate) with a custom service. The
default action for a custom service is terminate.
Empty service name tag (empty-service-name) — A service entry of zero length that
is used to represent any service. The router either responds with a PADO packet to all
PADI requests containing an empty service name tag, or denies (drops) all PADI requests
based on the action configured for the service.
Unknown service name tag (unknown-service-name) — A service entry that has not
been configured in the PPPoE service name table. When a PPPoE client includes an
unknown service name tag in the PPPoE service name table, the router responds based
on the action (drop or terminate) associated with the unknown service name entry.
The default action associated with the unknown service name tag depends on the
PPPoE service name table configuration. If all the services in the table are configured
to drop, the default action for the unknown service name tag is terminate. If all the
Chapter 12: Configuring Point-to-Point Protocol over Ethernet
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