Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - LINK LAYER CONFIGURATION GUIDE 2010-10-13 Configuration Manual page 616

JunosE 11.3.x Link Layer Configuration Guide
pppoe duplicate-protection
pppoe log pppoeControlPacket
pppoe mtu
584
Use the no version to disable this feature.
See pppoe always-offer.
Use to prevent a client from establishing more than one session using the same MAC
address.
This feature is disabled by default.
Example
host1(config-profile)#pppoe duplicate-protection
Use the no version to disable duplicate protection.
For PPPoE sessions that contain the IWF-Session DSL Forum VSA (26-254) in the
PADR packets sent from the client to the PPPoE access concentrator, multiple
subscriber sessions with the same MAC address can originate. This behavior occurs
because the interworking functionality (IWF) causes a PPPoE over ATM or PPP over
ATM (PPPoA) session to be converted by the digital subscriber line access multiplexer
(DSLAM) into a PPPoE session. As a result of this conversion, the MAC addresses of
all IWF PPPoE sessions contain the MAC address of the DSLAM device.
For PPPoE sessions with the IWF-Session VSA, duplication of MAC addresses is
configured by default. Regardless of whether you enabled duplicate protection, multiple
IWF PPPoE sessions with the same MAC address (the address of the DSLAM device)
are not terminated until the limit on the maximum number of PPPoE sessions configured
on the major interface is reached.
See "Guidelines for Configuring Duplicate Protection for IWF PPPoE Sessions" on
page 391 for a list of considerations to be observed when you use the duplicate protection
feature for IWF PPPoE sessions
See pppoe duplicate-protection
Use to enable packet trace logging on PPPoE dynamic interfaces created with this
profile. Packet trace information is logged to the pppoeControlPacket log.
Example
host1(config-profile)#pppoe log pppoeControlPacket
Use the no version to turn off packet trace logging.
See pppoe log pppoeControlPacket.
Use to cause the PPPoE application to send the string to the new client created when
the profile is dynamically attached to an IP interface.
The message string is saved in nonvolatile storage (NVS).
Example
host1(config-profile)#pppoe motm string
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