Juniper JUNOSE SOFTWARE 11.2.X - BROADBAND ACCESS CONFIGURATION GUIDE 7-20-2010 Configuration Manual page 437

Copyright © 2010, Juniper Networks, Inc.
Termination of a tunneled session can result from PPP termination, L2TP shutdown,
subscriber logout, or lower layer down events. When the session is terminated through
PPP, the software counts both the PPP terminate-request and the PPP
terminate-acknowledgement packets.
Accounting statistics reported in RADIUS octet counts (Acct-Input-Octets and
Acct-Output-Octets) for tunneled PPP customers at the L2TP LAC include the following
data:
All upper layer control traffic, including IPCP, IPCPv6, OSICP, and MPLSNCP
All data traffic, including IP, IPv6, MPLS, and OSI
PPP PAP or CHAP acknowledgments. and also retransmission of PAP or CHAP that
take place after the session is active (even when proxy authentication is accepted)
All PPP PAP or CHAP negotiations in the case where proxy authentication is disabled
or required to renegotiate at the LNS
All LCP traffic when proxy LCP is disabled or required to renegotiate at the LNS
All PPP LCP echo requests and their responses
PPP LCP terminate-request or terminate-acknowledgement packets from the client
or LNS when PPP initiates termination of the session
If present, the two PPP header bytes (Address Field 0xFF and Control Field 0x03)
as part of the L2TP payload
Accounting statistics reported in RADIUS octet counts (Acct-Input-Octets and
Acct-Output-Octets) for tunneled PPP customers at the L2TP LAC exclude the
following data:
LCP when Proxy LCP is enabled and accepted at the LNS
Initial PPP PAP request
Initial PPP CHAP challenge and response
Accounting statistics reported in RADIUS packet counts (Acct-Input-Packets and
Acct-Output-Packets) for tunneled PPP customers at the L2TP LAC are based on
packets delivered to or received from the L2TP session. These statistics exclude L2TP
control traffic and L2TP hello messages.
For information on accounting statistics for terminated PPP sessions, see the PPP
Accounting Statistics section in JunosE Link Layer Configuration Guide .
Chapter 13: Configuring an L2TP LNS
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