# pppoe duplicate-protection

#### Syntax

[ no ] pppoe duplicate-protection

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Sets up the router to prevent a client from establishing more than one session using the same MAC address. The no version disables this feature, and is the default setting for PPPoE sessions that do not contain the IWF-Session DSL VSA (26–254) in the PPPoE Active Discovery Request (PADR) packet sent from PPPoE clients to the access concentrator.

#### Mode

Profile Configuration, Subinterface Configuration