The Altiga L2TP Statistics MIB models counters and objects that are
of management interest for L2TP tunnels.

Acronyms
The following acronyms are used in this document:

AVP:        Attribute/Value Pair

CLID:       Calling Line ID

DNIS:       Dialed Number Identification Service

L2TP:       Layer 2 Tunnel Protocol

LAC:        L2TP Access Concentrator

LNS:        L2TP Network Server

MIB:        Management Information Base

RWS:        Receive Window Size

The compliance statement for agents which
implement the Altiga L2TP Statistics MIB.    

Values are:


alL2tpStatsLocalProtVers, 
alL2tpStatsVendorName, 
alL2tpStatsFirmwareRev, 
alL2tpStatsTotalTunnels, 
alL2tpStatsFailedTunnels, 
alL2tpStatsFailedAuthentications, 
alL2tpStatsActiveTunnels, 
alL2tpStatsMaxTunnels, 
alL2tpStatsTotalSessions, 
alL2tpStatsFailedSessions, 
alL2tpStatsActiveSessions, 
alL2tpStatsMaxSessions, 
alL2tpStatsControlRecvOctets, 
alL2tpStatsControlRecvPackets, 
alL2tpStatsControlRecvDiscards, 
alL2tpStatsControlSendOctets, 
alL2tpStatsControlSendPackets, 
alL2tpStatsPayloadRecvOctets, 
alL2tpStatsPayloadRecvPackets, 
alL2tpStatsPayloadRecvDiscards, 
alL2tpStatsPayloadSendOctets, 
alL2tpStatsPayloadSendPackets, 
alL2tpStatsTunnelRowStatus, 
alL2tpStatsTunnelPeerIpAddr, 
alL2tpStatsTunnelLocalTID, 
alL2tpStatsTunnelRemoteTID, 
alL2tpStatsTunnelState, 
alL2tpStatsTunnelInitiated, 
alL2tpStatsTunnelRemoteHostName, 
alL2tpStatsTunnelRemoteVendorName, 
alL2tpStatsTunnelRemoteFirmwareRevision, 
alL2tpStatsTunnelRemoteProtocolVersion, 
alL2tpStatsTunnelInitialRemoteRWS, 
alL2tpStatsTunnelBearerCapabilities, 
alL2tpStatsTunnelFramingCapabilities, 
alL2tpStatsTunnelControlRecvPackets, 
alL2tpStatsTunnelControlRecvDiscards, 
alL2tpStatsTunnelControlRecvZLB, 
alL2tpStatsTunnelControlOutOfSequence, 
alL2tpStatsTunnelControlOutOfWindow, 
alL2tpStatsTunnelControlSendPackets, 
alL2tpStatsTunnelControlSendZLB, 
alL2tpStatsTunnelControlAckTimeouts, 
alL2tpStatsTunnelCurrentRemoteRWS, 
alL2tpStatsTunnelSendSeq, 
alL2tpStatsTunnelSendSeqAck, 
alL2tpStatsTunnelRecvSeq, 
alL2tpStatsTunnelRecvSeqAck, 
alL2tpStatsTunnelTotalSessions, 
alL2tpStatsTunnelFailedSessions, 
alL2tpStatsTunnelActiveSessions, 
alL2tpStatsTunnelLastResultCode, 
alL2tpStatsTunnelLastErrorCode, 
alL2tpStatsTunnelLastErrorMessage, 
alL2tpStatsSessionRowStatus, 
alL2tpStatsSessionIfIndex, 
alL2tpStatsSessionTID, 
alL2tpStatsSessionLocalCID, 
alL2tpStatsSessionRemoteCID, 
alL2tpStatsSessionUserName, 
alL2tpStatsSessionState, 
alL2tpStatsSessionCallType, 
alL2tpStatsSessionCallSerialNumber, 
alL2tpStatsSessionTxConnectSpeed, 
alL2tpStatsSessionRxConnectSpeed, 
alL2tpStatsSessionCallBearerType, 
alL2tpStatsSessionFramingType, 
alL2tpStatsSessionPhysChanId, 
alL2tpStatsSessionDNIS, 
alL2tpStatsSessionCLID, 
alL2tpStatsSessionSubAddress, 
alL2tpStatsSessionPrivateGroupID, 
alL2tpStatsSessionProxyLcp, 
alL2tpStatsSessionAuthMethod, 
alL2tpStatsSessionRemotePPD, 
alL2tpStatsSessionSequencingState, 
alL2tpStatsSessionRecvOctets, 
alL2tpStatsSessionRecvPackets, 
alL2tpStatsSessionRecvDiscards, 
alL2tpStatsSessionOutSequence, 
alL2tpStatsSessionSendOctets, 
alL2tpStatsSessionSendPackets, 
alL2tpStatsSessionReassemblyTimeouts, 
alL2tpStatsSessionSendSeq, 
alL2tpStatsSessionSendSeqAck, 
alL2tpStatsSessionRecvSeq, 
alL2tpStatsSessionRecvSeqAck, 
alL2tpStatsSessionTunnelPeerIpAddr

Values are:


alL2tpStatsSessionLocalRWS, 
alL2tpStatsSessionRemoteInitialRWS, 
alL2tpStatsSessionRecvZLB, 
alL2tpStatsSessionSendZLB, 
alL2tpStatsSessionOutOfWindow, 
alL2tpStatsSessionAckTimeouts, 
alL2tpStatsSessionCurrentRemoteRWS, 
alL2tpStatsSessionSendSeqResets, 
alL2tpStatsSessionRecvSeqResets

DEPRECATED
The deprecated objects for L2TP statistics.    

This object describes the protocol version and
revision of the local implementation. The
first octet contains the protocol version. The
second octet contains the protocol revision.    

This object returns the number of sessions that
failed to reach the established state for this
tunnel domain.    

This object returns the number of sessions that
are currently active.    

The maximum number of simultaneously active L2TP sessions
since the system was booted.    

This object returns the number of control channel
octets received.    

This object returns the number of control packets
received.    

This object returns the number of control packets
received that were discarded.    

This object returns the number of control channel
octets that were transmitted to tunnel endpoints.    

This object returns the number of control packets
that were transmitted to tunnel endpoints.    

This object returns the number of payload channel
octets that were received.    

This object returns the number of payload packets
that were received.    

This object returns the number of received payload
packets that were discarded.    

This object returns the number of payload channel
octets that were transmitted to tunnel peers.    

This object returns the number of payload packets
that were transmitted to tunnel peers.    

This object returns the total number of tunnels
that have successfully reached the established
state.    

This object returns the number of tunnels that
failed to reach the established state.    

This object returns the number of failed tunnel
connection attempts because the tunnel peer
failed authentication.    

This object returns the number of tunnels that
are currently active.    

The maximum number of simultaneously active L2TP tunnels
since the system was booted.    

This object returns the total number of sessions
that have successfully reached the established state.    

The status of this row. Used to terminate the tunnel,
cannot be used to create a tunnel.    

This object describes the protocol version and
revision of the tunnel peers implementation. The
first octet contains the protocol version. The
second octet contains the protocol revision.    

This object contains the initial remote peer's
receive window size as indicated by the tunnel peer
(in the RWS AVP) during the tunnel establishment
phase. If the tunnel is idle this object should
maintain its value from the last time it was
connected.    

Possible values are:


sync, async, syncAsync
                

This object describes the Bearer Capabilities of
the tunnel peer. If the tunnel is idle this object
should maintain its value from the last time it was
connected.    

Possible values are:


digital, analog, digitalAnalog
                

This object describes the Framing Capabilities of
the tunnel peer. If the tunnel is idle this object
should maintain its value from the last time it was
connected.    

This object contains the number of control packets
received on the tunnel.    

This object returns the number of received payload
packets that were discarded.    

This object returns a count of the number of Zero
Length Body control packet acknowledgement packets
that were received.    

This object returns a count of the number of
control packets that were not received in the
correct order (as per the sequence number) on
this tunnel.    

This object contains the number of control
packets that were received outside of the
offered receive window. It is implementation
specific as to whether these packets are queued
or discarded.    

This object contains the number of control
packets that were transmitted to the tunnel
peer.    

This object contains the number of Zero Length
Body control packets that were transmitted to
the tunnel peer.    

This object returns a count of the number of
control packet timeouts due to the lack of a
timely acknowledgement from the tunnel peer.    

This object contains the current remote receive
window size as determined by the local flow
control mechanism employed.    

This object contains the next send sequence number
for the control channel.    

This object contains the send sequence number that
the tunnel peer has acknowledged for the control
channel. The flow control state can be determined
by subtracting the l2tpTunnelStatsSendSeq from
alL2tpStatsTunnelSendSeqAck and comparing this value
to l2tpTunnelStatsCurrentRemoteRWS.    

This object contains the next receive sequence
number expected to be received on this control
channel.    

This object contains the last receive sequence
number that was acknowledged back to the tunnel
peer for the control channel.    

This object contains the total number of sessions
that this tunnel has successfully connected through
to its tunnel peer since this tunnel was created.    

This object contains the total number of sessions
that were initiated but failed to reach the
established phase.    

This object contains the total number of sessions
for this tunnel.    

This object contains the local tunnel Identifier.    

This object contains the last value of the result
code as described in the Result Code AVP which
caused the tunnel to disconnect.    

This object contains the last value of the error
code as described in the Result Code AVP which
caused the tunnel to disconnect.    

This object contains the last value of the optional
message as described in the Result Code AVP which
caused the tunnel to disconnect.    

This object contains the remote tunnel Identifier.    

Possible values are:


tunnelIdle, tunnelConnecting, 
tunnelEstablished, tunnelDisconnecting

This field contains the current state of the control
tunnel.    

Possible values are:


locally, remotely
                

This object indicates whether the tunnel was
initiated locally or by the remote tunnel peer.    

This object contains the host name as discovered
during the tunnel establishment phase (via the Host
Name AVP) of the L2TP peer. If the tunnel is idle
this object should maintain its value from the last
time it was connected.    

This object identifies the vendor name of the peer's
L2TP implementation. If the tunnel is idle this
object should maintain its value from the last time
it was connected.    

This object contains the tunnel peer's firmware
revision number. If the tunnel is idle this object
should maintain its value from the last time it
was connected.    

The L2TP session status and statistics table.    

The status of this row. Used to terminate the session,
cannot be used to create a session.    

This object returns the last known transmit
baud rate for this session.    

This object returns the last known receive
baud rate for this session.    

Possible values are:


digital, analog
                

This object describes the bearer type of this
session.    

Possible values are:


asynchronous, synchronous
                

This object describes the framing type of this
session.    

This object contains the physical channel
identifier for the session.    

This object identifies the Dialed Number
Information String that the LAC obtained from
the network for the session. If no DNIS was
provided then a null string will be returned.    

This object identifies the Calling Line ID
that the LAC obtained from the network for
the session. If no CLID was provided then a
null string will be returned.    

This object identifies the Sub Address that
the LAC obtained from the network for the
session. If no Sub Address was provided then
a null string will be returned.    

This object identifies the Private Group
Identifier used for this tunneled session.
If no Private Group Identifier was provided
then a null string will be returned.    

Indicates whether the LAC performed proxy LCP
for this session.    

This value for this object is equal to the value
of ifIndex of the Interfaces MIB for session
interfaces of type L2TP.    

Possible values are:


none, text, pppChap, pppPap
                

This object contains the proxy authentication
method employed by the LAC for the session. If
l2tpSessionProxyLcp is false(2) this object should
not be interpreted.    

DEPRECATED
This object returns the local send window size
for this session. If the value of the object
alL2tpStatsSessionSequencingState is none(1)
then this object should not be interpreted.    

DEPRECATED
This object returns the initial remote send
window size for this session.  If the value
of the object alL2tpStatsSessionSequencingState
is none(1) then this object should not be
interpreted.    

This object contains the Packet Processing Delay
for the session.  If the value of the object
alL2tpStatsSessionSequencingState is none(1)
then this object should not be interpreted.    

Possible values are:


none, remote, local, both
                

This object defines which tunnel peers have
requested payload sequencing. The value of
both(4) indicates that both peers have requested
payload sequencing.    

This object returns the total number payload octets
received for this session.    

This object returns the total number of payload packets
received for this session.    

This object returns the total number of payload packets
received that were discarded for this session.    

DEPRECATED
This object returns the total number of Zero Length
Body acknowlegement payload packets received for
this session.    

This object returns the total number of packets
received for this session which were received out
of sequence.    

This object contains the control channel tunnel
identifier for this session.    

DEPRECATED
This object returns a count of the number of
payload packets that were received outside of the
expected window for this session.    

This object returns the total number of payload octets
transmitted for this session.    

This object returns the total number of payload packets
transmitted for this session.    

DEPRECATED
This object returns the total number of Zero
Length Body acknowledgement packets transmitted
for this session.    

DEPRECATED
This object returns the total number of
acknowledgement timeouts seen on payload
packets for this session.    

This object returns the number of reassembly
time outs that have occured for this session.    

DEPRECATED
This object contains the current remote receive
window size as determined by the local flow
control mechanism employed.    

This object contains the next send sequence number
for for this session.    

This object contains the send sequence number
that the tunnel peer has acknowledged for the
payload channel. The flow control state can be
determined by subtracting the alL2tpStatsSessionSendSeq
from alL2tpStatsSessionSendSeqAck and comparing this
value to l2tpSesssionStatsCurrentRemoteRWS.    

DEPRECATED
This object contains the total number of sequence
number resets (payload packets with the R-bit set)
sent on this session.    

This object contains the local call identifier
for the session.    

This object contains the next receive sequence
number expected to be received on this session.    

This object contains the last receive sequence
number that was acknowledged back to the tunnel
peer for the session.    

DEPRECATED
This object contains the total number of sequence
number resets (payload packets with the R-bit set)
received on this session.    

The peer's IP address for the tunnel to which this
session belongs.    

This object contains the remote call identifier
for the session.    

This object identifies the peer session name on
this interface. This is typically the login name
of the remote user. If the user name is unknown to
the local tunnel peer then this object will contain
a null string.    

Possible values are:


sessionIdle, sessionConnecting, 
sessionEstablished, 
sessionDisconnecting

This object contains the current state of the
session.    

Possible values are:


lacIncoming, lnsIncoming, lacOutgoing, 
lnsOutgoing

This object indicates the type of call and the
role this tunnel peer is providing for this
session. For example, lacIncoming(1) indicates
that this tunnel peer is acting as a LAC and
generated a Incoming-Call-Request to the tunnel
peer (the LNS). Note that tunnel peers can be
both LAC and LNS simultaneously.    

This object contains the serial number that has
been assigned to this session.