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RFC 3371

 
 
 

Layer Two Tunneling Protocol "L2TP" Management Information Base

Part 3 of 3, p. 35 to 70
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   l2tpTunnelConfigTransport OBJECT-TYPE
           SYNTAX          INTEGER {
                              other(1),
                              none(2),
                              udpIp(3),
                              frameRelay(4),
                              atm(5)
                           }
           MAX-ACCESS      read-write
           STATUS          current
           DESCRIPTION
              "This object defines the underlying transport media
               that is in use for this tunnel entry. Different tunnel
               transports may define MIB extensions to the L2TP tunnel
               table to realize the transport layer. For example if the
               value of this object is 'udpIp' then the value of ifIndex
               for this table may be used to determine state from the
               l2tpUdpStatsTable. This object cannot be modified when
               the tunnel is in a connecting or connected state."
           ::= { l2tpTunnelConfigEntry 13 }

   l2tpTunnelConfigDrainTunnel OBJECT-TYPE
           SYNTAX          TruthValue
           MAX-ACCESS      read-write
           STATUS          current
           DESCRIPTION
              "Setting this object to 'true' will prevent any new
               session from being either initiated or accepted but
               does NOT disconnect any active sessions for this
               tunnel. Note that when this occurs the
               l2tpTunnelStatsDrainingTunnel status object of
               this tunnel should reflect that it is 'draining'.
               To cancel a drain this object should be set to
               false(2).  Setting this object to false(2) when
               the L2TP objects l2tpDrainTunnels or
               l2tpDomainConfigDrainTunnels is true(1) has
               no affect, this tunnels will continue to drain."
           DEFVAL { false }
           ::= { l2tpTunnelConfigEntry 14 }

   l2tpTunnelConfigProxyPPPAuth OBJECT-TYPE
           SYNTAX          TruthValue
           MAX-ACCESS      read-write
           STATUS          current
           DESCRIPTION
              "This object is used to configure the sending
               or acceptance of the session PPP Proxy
               Authentication AVP's on the LAC or LNS."

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           DEFVAL { true }
           ::= { l2tpTunnelConfigEntry 15 }

   --
   --      The L2TP Tunnel Status and Statisticss Table
   --


   l2tpTunnelStatsTable    OBJECT-TYPE
           SYNTAX          SEQUENCE OF L2tpTunnelStatsEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "The L2TP tunnel status and statistics table. This
               table contains objects that can be used to describe
               the current status and statistics of a single L2TP
               tunnel. There is a 1-1 correspondence between
               conceptual rows of this table and conceptual rows of
               the l2tpTunnelConfigTable."
           ::= { l2tpObjects 5 }

   l2tpTunnelStatsEntry    OBJECT-TYPE
           SYNTAX          L2tpTunnelStatsEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "An L2TP tunnel interface stats entry."
           AUGMENTS { l2tpTunnelConfigEntry }
           ::= { l2tpTunnelStatsTable 1 }

   L2tpTunnelStatsEntry ::=
           SEQUENCE {
               l2tpTunnelStatsLocalTID
                   Integer32,
               l2tpTunnelStatsRemoteTID
                   Integer32,
               l2tpTunnelStatsState
                   INTEGER,
               l2tpTunnelStatsInitiated
                   INTEGER,
               l2tpTunnelStatsRemoteHostName
                   SnmpAdminString,
               l2tpTunnelStatsRemoteVendorName
                   SnmpAdminString,
               l2tpTunnelStatsRemoteFirmwareRev
                   Integer32,
               l2tpTunnelStatsRemoteProtocolVer
                   OCTET STRING,

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               l2tpTunnelStatsInitialRemoteRWS
                   Integer32,
               l2tpTunnelStatsBearerCaps
                   INTEGER,
               l2tpTunnelStatsFramingCaps
                   INTEGER,
               l2tpTunnelStatsControlRxPkts
                   Counter32,
               l2tpTunnelStatsControlRxZLB
                   Counter32,
               l2tpTunnelStatsControlOutOfSeq
                   Counter32,
               l2tpTunnelStatsControlOutOfWin
                   Counter32,
               l2tpTunnelStatsControlTxPkts
                   Counter32,
               l2tpTunnelStatsControlTxZLB
                   Counter32,
               l2tpTunnelStatsControlAckTO
                   Counter32,
               l2tpTunnelStatsCurrentRemoteRWS
                   Gauge32,
               l2tpTunnelStatsTxSeq
                   Integer32,
               l2tpTunnelStatsTxSeqAck
                   Integer32,
               l2tpTunnelStatsRxSeq
                   Integer32,
               l2tpTunnelStatsRxSeqAck
                   Integer32,
               l2tpTunnelStatsTotalSessions
                   Counter32,
               l2tpTunnelStatsFailedSessions
                   Counter32,
               l2tpTunnelStatsActiveSessions
                   Gauge32,
               l2tpTunnelStatsLastResultCode
                   Integer32,
               l2tpTunnelStatsLastErrorCode
                   Integer32,
               l2tpTunnelStatsLastErrorMessage
                   SnmpAdminString,
               l2tpTunnelStatsDrainingTunnel
                   TruthValue
           }

   l2tpTunnelStatsLocalTID OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)

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           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the local tunnel Identifier."
           REFERENCE "RFC 2661, Section 3.1"
           ::= { l2tpTunnelStatsEntry 1 }

   l2tpTunnelStatsRemoteTID OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the remote tunnel Identifier."
           REFERENCE "RFC 2661, Section 3.1"
           ::= { l2tpTunnelStatsEntry 2 }

   l2tpTunnelStatsState    OBJECT-TYPE
           SYNTAX          INTEGER {
                               tunnelIdle(1),
                               tunnelConnecting(2),
                               tunnelEstablished(3),
                               tunnelDisconnecting(4)
                           }
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This field contains the current state of the
               control tunnel."
           ::= { l2tpTunnelStatsEntry 3 }

   l2tpTunnelStatsInitiated OBJECT-TYPE
           SYNTAX          INTEGER {
                               locally(1),
                               remotely(2)
                           }
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object indicates whether the tunnel was
               initiated locally or by the remote tunnel peer."
           ::= { l2tpTunnelStatsEntry 4 }

   l2tpTunnelStatsRemoteHostName OBJECT-TYPE
           SYNTAX          SnmpAdminString
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the host name as discovered

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               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."
           ::= { l2tpTunnelStatsEntry 5 }

   l2tpTunnelStatsRemoteVendorName OBJECT-TYPE
           SYNTAX          SnmpAdminString
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpTunnelStatsEntry 6 }

   l2tpTunnelStatsRemoteFirmwareRev OBJECT-TYPE
           SYNTAX          Integer32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpTunnelStatsEntry 7 }

   l2tpTunnelStatsRemoteProtocolVer OBJECT-TYPE
           SYNTAX          OCTET STRING (SIZE(2))
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpTunnelStatsEntry 8 }

   l2tpTunnelStatsInitialRemoteRWS OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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

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               maintain its value from the last time it was
               connected."
           ::= { l2tpTunnelStatsEntry 9 }

   l2tpTunnelStatsBearerCaps OBJECT-TYPE
           SYNTAX          INTEGER {
                               none(1),
                               digital(2),
                               analog(3),
                               digitalAnalog(4)
                           }
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpTunnelStatsEntry 10 }

   l2tpTunnelStatsFramingCaps OBJECT-TYPE
           SYNTAX          INTEGER {
                               none(1),
                               sync(2),
                               async(3),
                               syncAsync(4)
                           }
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpTunnelStatsEntry 11 }

   l2tpTunnelStatsControlRxPkts OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the number of control packets
               received on the tunnel."
           ::= { l2tpTunnelStatsEntry 12 }

   l2tpTunnelStatsControlRxZLB OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only

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           STATUS          current
           DESCRIPTION
              "This object returns a count of the number of Zero
               Length Body control packet acknowledgement packets
               that were received."
           ::= { l2tpTunnelStatsEntry 13 }

   l2tpTunnelStatsControlOutOfSeq OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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 including out of window
               packets."
           ::= { l2tpTunnelStatsEntry 14 }

   l2tpTunnelStatsControlOutOfWin OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpTunnelStatsEntry 15 }

   l2tpTunnelStatsControlTxPkts OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the number of control
               packets that were transmitted to the tunnel
               peer."
           ::= { l2tpTunnelStatsEntry 16 }

   l2tpTunnelStatsControlTxZLB OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the number of Zero Length
               Body control packets transmitted to the tunnel

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               peer."
           ::= { l2tpTunnelStatsEntry 17 }

   l2tpTunnelStatsControlAckTO OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object returns a count of the number of
               control packet timeouts due to the lack of a
               timely acknowledgement from the tunnel peer."
           ::= { l2tpTunnelStatsEntry 18 }

   l2tpTunnelStatsCurrentRemoteRWS OBJECT-TYPE
           SYNTAX          Gauge32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the current remote receive
               window size as determined by the local flow
               control mechanism employed."
           ::= { l2tpTunnelStatsEntry 19 }

   l2tpTunnelStatsTxSeq  OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the next send sequence number
               for the control channel."
           ::= { l2tpTunnelStatsEntry 20 }

   l2tpTunnelStatsTxSeqAck OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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 l2tpTunnelStatsTxSeq from
               l2tpTunnelStatsTxSeqAck and comparing this value
               to l2tpTunnelStatsCurrentRemoteRWS (taking into
               consideration sequence number wraps)."
           ::= { l2tpTunnelStatsEntry 21 }

   l2tpTunnelStatsRxSeq  OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)

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           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the next receive sequence
               number expected to be received on this control
               channel."
           ::= { l2tpTunnelStatsEntry 22 }

   l2tpTunnelStatsRxSeqAck OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the last receive sequence
               number that was acknowledged back to the tunnel
               peer for the control channel."
           ::= { l2tpTunnelStatsEntry 23 }

   l2tpTunnelStatsTotalSessions OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the total number of sessions
               that this tunnel has successfully connected through
               to its tunnel peer since this tunnel was created."
           ::= { l2tpTunnelStatsEntry 24 }

   l2tpTunnelStatsFailedSessions OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the total number of sessions
               that were initiated but failed to reach the
               established phase."
           ::= { l2tpTunnelStatsEntry 25 }

   l2tpTunnelStatsActiveSessions OBJECT-TYPE
           SYNTAX          Gauge32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the total number of sessions
               in the established state for this tunnel."
           ::= { l2tpTunnelStatsEntry 26 }

   l2tpTunnelStatsLastResultCode OBJECT-TYPE

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           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the last value of the result
               code as described in the Result Code AVP which
               caused the tunnel to disconnect."
           ::= { l2tpTunnelStatsEntry 27 }

   l2tpTunnelStatsLastErrorCode OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the last value of the error
               code as described in the Result Code AVP which
               caused the tunnel to disconnect."
           ::= { l2tpTunnelStatsEntry 28 }

   l2tpTunnelStatsLastErrorMessage OBJECT-TYPE
           SYNTAX          SnmpAdminString
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the last value of the optional
               message as described in the Result Code AVP which
               caused the tunnel to disconnect."
           ::= { l2tpTunnelStatsEntry 29 }

   l2tpTunnelStatsDrainingTunnel OBJECT-TYPE
           SYNTAX          TruthValue
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object indicates if this tunnel is draining
               off sessions. This object will return false(2) when
               the tunnel is not draining sessions or after the
               last session has disconnected when the tunnel is in
               the draining state."
           ::= { l2tpTunnelStatsEntry 30 }

   --
   --      { l2tpObjects 6 } reserved for future use
   --

   --
   --      The L2TP Session Status and Statistics Table
   --

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   l2tpSessionStatsTable   OBJECT-TYPE
           SYNTAX          SEQUENCE OF L2tpSessionStatsEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "The L2TP session status and statistics table. This
               table contains the objects that can be used to
               describe the current status and statistics of a
               single L2TP tunneled session."
           ::= { l2tpObjects 7 }

   l2tpSessionStatsEntry   OBJECT-TYPE
           SYNTAX          L2tpSessionStatsEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "An L2TP session interface stats entry."
           INDEX { l2tpSessionStatsTunnelIfIndex,
                   l2tpSessionStatsLocalSID }
           ::= { l2tpSessionStatsTable 1 }

   L2tpSessionStatsEntry ::=
           SEQUENCE {
               l2tpSessionStatsTunnelIfIndex
                   InterfaceIndex,
               l2tpSessionStatsIfIndex
                   InterfaceIndex,
               l2tpSessionStatsLocalSID
                   Integer32,
               l2tpSessionStatsRemoteSID
                   Integer32,
               l2tpSessionStatsUserName
                   SnmpAdminString,
               l2tpSessionStatsState
                   INTEGER,
               l2tpSessionStatsCallType
                   INTEGER,
               l2tpSessionStatsCallSerialNumber
                   Unsigned32,
               l2tpSessionStatsTxConnectSpeed
                   Unsigned32,
               l2tpSessionStatsRxConnectSpeed
                   Unsigned32,
               l2tpSessionStatsCallBearerType
                   INTEGER,
               l2tpSessionStatsFramingType
                   INTEGER,
               l2tpSessionStatsPhysChanId

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                   Unsigned32,
               l2tpSessionStatsDNIS
                   SnmpAdminString,
               l2tpSessionStatsCLID
                   SnmpAdminString,
               l2tpSessionStatsSubAddress
                   SnmpAdminString,
               l2tpSessionStatsPrivateGroupID
                   SnmpAdminString,
               l2tpSessionStatsProxyLcp
                   TruthValue,
               l2tpSessionStatsAuthMethod
                   INTEGER,
               l2tpSessionStatsSequencingState
                   INTEGER,
               l2tpSessionStatsOutSequence
                   Counter32,
               l2tpSessionStatsReassemblyTO
                   Counter32,
               l2tpSessionStatsTxSeq
                   Integer32,
               l2tpSessionStatsRxSeq
                   Integer32
           }

   l2tpSessionStatsTunnelIfIndex OBJECT-TYPE
           SYNTAX          InterfaceIndex
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "This object identifies the session's associated
               L2TP tunnel ifIndex value."
           ::= { l2tpSessionStatsEntry 1 }

   l2tpSessionStatsIfIndex OBJECT-TYPE
           SYNTAX          InterfaceIndex
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object identifies the ifIndex value of the
               interface from which PPP packets are being tunneled.
               For example this could be a DS0 ifIndex on a
               LAC or it would be the PPP ifIndex on the LNS."
           ::= { l2tpSessionStatsEntry 2 }

   l2tpSessionStatsLocalSID OBJECT-TYPE
           SYNTAX          Integer32 (1..65535)
           MAX-ACCESS      not-accessible

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           STATUS          current
           DESCRIPTION
              "This object contains the local assigned session
               identifier for this session."
           REFERENCE "RFC 2661, Section 3.1"
           ::= { l2tpSessionStatsEntry 3 }

   l2tpSessionStatsRemoteSID OBJECT-TYPE
           SYNTAX          Integer32  (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the remote assigned session
               identifier for this session. When a session is
               starting this value may be zero until the remote
               tunnel endpoint has responded."
           REFERENCE "RFC 2661, Section 3.1"
           ::= { l2tpSessionStatsEntry 4 }

   l2tpSessionStatsUserName OBJECT-TYPE
           SYNTAX          SnmpAdminString
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpSessionStatsEntry 5 }

   l2tpSessionStatsState   OBJECT-TYPE
           SYNTAX          INTEGER {
                               sessionIdle(1),
                               sessionConnecting(2),
                               sessionEstablished(3),
                               sessionDisconnecting(4)
                           }
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the current state of the
               session."
           ::= { l2tpSessionStatsEntry 6 }

   l2tpSessionStatsCallType OBJECT-TYPE
           SYNTAX          INTEGER {
                               lacIncoming(1),

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                               lnsIncoming(2),
                               lacOutgoing(3),
                               lnsOutgoing(4)
                           }
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpSessionStatsEntry 7 }

   l2tpSessionStatsCallSerialNumber OBJECT-TYPE
           SYNTAX          Unsigned32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the serial number that has
               been assigned to this  session."
           ::= { l2tpSessionStatsEntry 8 }

   l2tpSessionStatsTxConnectSpeed OBJECT-TYPE
           SYNTAX          Unsigned32
           UNITS           "bits per second"
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object returns the last known transmit
               baud rate for this session."
           ::= { l2tpSessionStatsEntry 9 }

   l2tpSessionStatsRxConnectSpeed OBJECT-TYPE
           SYNTAX          Unsigned32
           UNITS           "bits per second"
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object returns the last known receive
               baud rate for this session established."
           ::= { l2tpSessionStatsEntry 10 }

   l2tpSessionStatsCallBearerType OBJECT-TYPE
           SYNTAX          INTEGER {
                               none(1),

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                               digital(2),
                               analog(3)
                           }
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object describes the bearer type of this
               session."
           ::= { l2tpSessionStatsEntry 11 }

   l2tpSessionStatsFramingType OBJECT-TYPE
           SYNTAX          INTEGER {
                               none(1),
                               sync(2),
                               async(3)
                           }
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object describes the framing type of this
               session."
           ::= { l2tpSessionStatsEntry 12 }

   l2tpSessionStatsPhysChanId OBJECT-TYPE
           SYNTAX          Unsigned32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the physical channel
               identifier for the session."
           ::= { l2tpSessionStatsEntry 13 }

   l2tpSessionStatsDNIS    OBJECT-TYPE
           SYNTAX          SnmpAdminString
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpSessionStatsEntry 14 }

   l2tpSessionStatsCLID    OBJECT-TYPE
           SYNTAX          SnmpAdminString
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION

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              "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."
           ::= { l2tpSessionStatsEntry 15 }

   l2tpSessionStatsSubAddress OBJECT-TYPE
           SYNTAX          SnmpAdminString
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpSessionStatsEntry 16 }

   l2tpSessionStatsPrivateGroupID OBJECT-TYPE
           SYNTAX          SnmpAdminString
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpSessionStatsEntry 17 }

   l2tpSessionStatsProxyLcp OBJECT-TYPE
           SYNTAX          TruthValue
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "Indicates whether the LAC performed proxy LCP
               for this session."
           ::= { l2tpSessionStatsEntry 18 }

   l2tpSessionStatsAuthMethod OBJECT-TYPE
           SYNTAX          INTEGER {
                               none(1),
                               text(2),
                               pppChap(3),
                               pppPap(4),
                               pppEap(5),
                               pppMsChapV1(6),
                               pppMsChapV2(7),
                               other(8)
                           }

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           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "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."
           ::= { l2tpSessionStatsEntry 19 }

   l2tpSessionStatsSequencingState OBJECT-TYPE
           SYNTAX          INTEGER {
                               none(1),
                               remote(2),
                               local(3),
                               both(4)
                           }
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object defines which tunnel peers have
               requested payload sequencing. The value of
               both(4) indicates that both peers have requested
               payload sequencing."
           ::= { l2tpSessionStatsEntry 20 }

   l2tpSessionStatsOutSequence OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object returns the total number of packets
               received for this session which were received out
               of sequence."
           ::= { l2tpSessionStatsEntry 21 }

   l2tpSessionStatsReassemblyTO OBJECT-TYPE
           SYNTAX          Counter32
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object returns the number of reassembly
               timeouts that have occurred for this session."
           ::= { l2tpSessionStatsEntry 22 }

   l2tpSessionStatsTxSeq OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current

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           DESCRIPTION
              "This object contains the next send sequence number
               for for this session."
           ::= { l2tpSessionStatsEntry 23 }

   l2tpSessionStatsRxSeq OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the next receive sequence
               number expected to be received on this session."
           ::= { l2tpSessionStatsEntry 24 }

   --
   --      The L2TP Tunnel Mapping Table
   --

   l2tpTunnelMapTable      OBJECT-TYPE
           SYNTAX          SEQUENCE OF L2tpTunnelMapEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "The L2TP Tunnel index mapping table. This table
               is intended to assist management applications
               to quickly determine what the ifIndex value is
               for a given local tunnel identifier."
           ::= { l2tpObjects 8 }

   l2tpTunnelMapEntry OBJECT-TYPE
           SYNTAX          L2tpTunnelMapEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "An L2TP tunnel index map entry."
           INDEX { l2tpTunnelMapLocalTID }
           ::= { l2tpTunnelMapTable 1 }

   L2tpTunnelMapEntry ::=
           SEQUENCE {
               l2tpTunnelMapLocalTID
                   Integer32,
               l2tpTunnelMapIfIndex
                   InterfaceIndex
           }

   l2tpTunnelMapLocalTID   OBJECT-TYPE
           SYNTAX          Integer32 (1..65535)

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           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "This object contains the local tunnel Identifier."
           REFERENCE "RFC 2661, Section 3.1"
           ::= { l2tpTunnelMapEntry 1 }

   l2tpTunnelMapIfIndex    OBJECT-TYPE
           SYNTAX          InterfaceIndex
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This value for this object is equal to the value
               of ifIndex of the Interfaces MIB for tunnel
               interfaces of type L2TP."
           ::= { l2tpTunnelMapEntry 2 }

   --
   --      The L2TP Session Mapping Table
   --

   l2tpSessionMapTable     OBJECT-TYPE
           SYNTAX          SEQUENCE OF L2tpSessionMapEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "The L2TP Session index mapping table. This table
               is intended to assist management applications
               to map interfaces to a tunnel and session
               identifier."
           ::= { l2tpObjects 9 }

   l2tpSessionMapEntry     OBJECT-TYPE
           SYNTAX          L2tpSessionMapEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "An L2TP Session index map entry."
           INDEX { l2tpSessionMapIfIndex }
           ::= { l2tpSessionMapTable 1 }

   L2tpSessionMapEntry ::=
           SEQUENCE {
               l2tpSessionMapIfIndex
                   InterfaceIndex,
               l2tpSessionMapTunnelIfIndex
                   InterfaceIndex,
               l2tpSessionMapLocalSID

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                   Integer32,
               l2tpSessionMapStatus
                   RowStatus
           }

   l2tpSessionMapIfIndex   OBJECT-TYPE
           SYNTAX          InterfaceIndex
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "This object identifies the ifIndex value of the
               interface which is receiving or sending its packets
               over an L2TP tunnel. For example this could be a DS0
               ifIndex on a LAC or a PPP ifIndex on the LNS."
           ::= { l2tpSessionMapEntry 1 }

   l2tpSessionMapTunnelIfIndex OBJECT-TYPE
           SYNTAX          InterfaceIndex
           MAX-ACCESS      read-create
           STATUS          current
           DESCRIPTION
              "This object identifies the sessions associated
               L2TP tunnel ifIndex value. When this object is
               set it provides a binding between a particular
               interface identified by l2tpSessionMapIfIndex
               to a particular tunnel."
           ::= { l2tpSessionMapEntry 2 }

   l2tpSessionMapLocalSID  OBJECT-TYPE
           SYNTAX          Integer32 (1..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object contains the local assigned session
               identifier for this session."
           REFERENCE "RFC 2661, Section 3.1"
           ::= { l2tpSessionMapEntry 3 }

   l2tpSessionMapStatus    OBJECT-TYPE
           SYNTAX          RowStatus
           MAX-ACCESS      read-create
           STATUS          current
           DESCRIPTION
              "The status of this session map entry."
           ::= { l2tpSessionMapEntry 4 }

   --
   --      { l2tpIpUdpObjects 1 } reserved for future use

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   --
   --      The L2TP UDP/IP Transport Status and Statistics Table
   --

   l2tpUdpStatsTable       OBJECT-TYPE
           SYNTAX          SEQUENCE OF L2tpUdpStatsEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "The L2TP UDP/IP transport stats table. This table
               contains objects that can be used to describe the
               current status and statistics of the UDP/IP L2TP
               tunnel transport."
           ::= { l2tpIpUdpObjects 2 }

   l2tpUdpStatsEntry       OBJECT-TYPE
           SYNTAX          L2tpUdpStatsEntry
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "An L2TP UDP/IP transport stats entry."
           INDEX { l2tpUdpStatsIfIndex }
           ::= { l2tpUdpStatsTable 1 }

   L2tpUdpStatsEntry ::=
           SEQUENCE {
               l2tpUdpStatsIfIndex
                   InterfaceIndex,
               l2tpUdpStatsPeerPort
                   Integer32,
               l2tpUdpStatsLocalPort
                   Integer32
           }

   l2tpUdpStatsIfIndex     OBJECT-TYPE
           SYNTAX          InterfaceIndex
           MAX-ACCESS      not-accessible
           STATUS          current
           DESCRIPTION
              "This value for this object is equal to the
               value of ifIndex of the Interfaces MIB for
               tunnel interfaces of type L2TP and which have
               a L2TP transport of UDP/IP."
           ::= { l2tpUdpStatsEntry 1 }

   l2tpUdpStatsPeerPort    OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only

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           STATUS          current
           DESCRIPTION
              "This object reflects the peer's UDP port number
               used for this tunnel. When not known a value of
               zero should be returned."
           ::= { l2tpUdpStatsEntry 2 }

   l2tpUdpStatsLocalPort   OBJECT-TYPE
           SYNTAX          Integer32 (0..65535)
           MAX-ACCESS      read-only
           STATUS          current
           DESCRIPTION
              "This object reflects the local UDP port number
               that this tunnel is bound to."
           ::= { l2tpUdpStatsEntry 3 }

   --
   --      Definition of generic L2TP notifications
   --

   l2tpTunnelAuthFailure NOTIFICATION-TYPE
           OBJECTS         {
                           l2tpTunnelStatsInitiated,
                           l2tpTunnelStatsRemoteHostName
                           }
           STATUS          current
           DESCRIPTION
              "A l2tpTunnelAuthFailure trap signifies that an
               attempt to establish a tunnel to a remote peer
               has failed authentication."
           ::= { l2tpNotifications 1 }

   --
   --      conformance information
   --

   l2tpGroups      OBJECT IDENTIFIER ::= { l2tpConformance 1 }
   l2tpCompliances OBJECT IDENTIFIER ::= { l2tpConformance 2 }

   --
   --      compliance statements
   --

   l2tpMIBFullCompliance MODULE-COMPLIANCE
           STATUS          current
           DESCRIPTION
              "When this MIB is implemented with support for
               read-create and read-write, then such an

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               implementation can claim full compliance. Such
               an implementation can then be both monitored
               and configured with this MIB."

           MODULE          -- this module

        -- unconditionally mandatory groups
           MANDATORY-GROUPS {
                               l2tpConfigGroup,
                               l2tpStatsGroup,
                               l2tpTrapGroup
                            }
        -- conditionally mandatory groups
           GROUP           l2tpIpUdpGroup
           DESCRIPTION
              "This group is mandatory for implementations that
               support L2TP over UDP/IP."

        -- optional groups
           GROUP           l2tpDomainGroup
           DESCRIPTION
              "This group is optional for L2TP devices that
               group tunnel endpoints into tunnel domains."

        -- optional Mapping Group
           GROUP           l2tpMappingGroup
           DESCRIPTION
              "This group is optional for L2TP devices that
               provide index mapping."

        -- optional Security Group
           GROUP           l2tpSecurityGroup
           DESCRIPTION
              "This group is optional for SNMP agents which support
               both authentication and privacy of SNMP messages for
               the management of L2TP keys."

        -- optional High Capacity Group
           GROUP           l2tpHCPacketGroup
           DESCRIPTION
              "This group is mandatory for implementations that
               support the l2tpDomainGroup AND could potentially
               overflow the L2TP Domain 32-bit counters is less
               than one hour."

          ::= { l2tpCompliances 1 }

   l2tpMIBReadOnlyCompliance MODULE-COMPLIANCE

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           STATUS          current
           DESCRIPTION
              "When this MIB is implemented without support for
               read-create and read-write (i.e. in read-only mode),
               then such an implementation can claim read-only
               compliance. Such an implementation can then be
               monitored but can not be configured with this MIB."

           MODULE          -- this module

        -- unconditionally mandatory groups
           MANDATORY-GROUPS {
                               l2tpConfigGroup,
                               l2tpStatsGroup,
                               l2tpTrapGroup
                            }

           OBJECT   l2tpAdminState
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDrainTunnels
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigDomainId
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigHelloInterval
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigIdleTimeout
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigControlRWS
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigControlMaxRetx

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           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigControlMaxRetxTO
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigPayloadSeq
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigReassemblyTO
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigTransport
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigDrainTunnel
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigProxyPPPAuth
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

        -- conditionally mandatory groups
           GROUP           l2tpIpUdpGroup
           DESCRIPTION
              "This group is mandatory for implementations that
               support L2TP over UDP/IP."

        -- optional groups
           GROUP           l2tpDomainGroup
           DESCRIPTION
              "This group is optional for L2TP devices that
               group tunnel endpoints into tunnel domains."

           OBJECT   l2tpDomainConfigAdminState
           MIN-ACCESS read-only

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           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigDrainTunnels
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigTunnelHelloInt
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigTunnelIdleTO
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigControlRWS
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigControlMaxRetx
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigControlMaxRetxTO
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigPayloadSeq
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigReassemblyTO
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigProxyPPPAuth
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

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           OBJECT   l2tpDomainConfigStorageType
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigStatus
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

        -- optional Mapping Group
           GROUP           l2tpMappingGroup
           DESCRIPTION
              "This group is optional for L2TP devices that
               provide index mapping."

           OBJECT   l2tpSessionMapTunnelIfIndex
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpSessionMapStatus
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

        -- optional Security Group
           GROUP           l2tpSecurityGroup
           DESCRIPTION
              "This group is optional for SNMP agents which support
               both authentication and privacy of SNMP messages for
               the management of L2TP keys."

           OBJECT   l2tpDomainConfigAuth
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigSecret
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpDomainConfigTunnelSecurity
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

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           OBJECT   l2tpTunnelConfigAuth
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigSecret
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

           OBJECT   l2tpTunnelConfigSecurity
           MIN-ACCESS read-only
           DESCRIPTION
              "Write access is not required."

        -- optional High Capacity Group
           GROUP           l2tpHCPacketGroup
           DESCRIPTION
              "This group is mandatory for implementations that
               support the l2tpDomainGroup AND could potentially
               overflow the L2TP Domain 32-bit counters is less
               than one hour."

           ::= { l2tpCompliances 2 }

   -- units of conformance

   l2tpConfigGroup OBJECT-GROUP
           OBJECTS {
               l2tpAdminState,
               l2tpDrainTunnels,
               l2tpTunnelConfigDomainId,
               l2tpTunnelConfigHelloInterval,
               l2tpTunnelConfigIdleTimeout,
               l2tpTunnelConfigControlRWS,
               l2tpTunnelConfigControlMaxRetx,
               l2tpTunnelConfigControlMaxRetxTO,
               l2tpTunnelConfigPayloadSeq,
               l2tpTunnelConfigReassemblyTO,
               l2tpTunnelConfigTransport,
               l2tpTunnelConfigDrainTunnel,
               l2tpTunnelConfigProxyPPPAuth
           }
           STATUS          current
           DESCRIPTION
              "A collection of objects providing configuration
               information of the L2TP protocol, tunnels and
               sessions."

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           ::= { l2tpGroups 1 }

   l2tpStatsGroup OBJECT-GROUP
           OBJECTS {
               l2tpProtocolVersions,
               l2tpVendorName,
               l2tpFirmwareRev,
               l2tpDrainingTunnels,
               l2tpTunnelStatsLocalTID,
               l2tpTunnelStatsRemoteTID,
               l2tpTunnelStatsState,
               l2tpTunnelStatsInitiated,
               l2tpTunnelStatsRemoteHostName,
               l2tpTunnelStatsRemoteVendorName,
               l2tpTunnelStatsRemoteFirmwareRev,
               l2tpTunnelStatsRemoteProtocolVer,
               l2tpTunnelStatsInitialRemoteRWS,
               l2tpTunnelStatsBearerCaps,
               l2tpTunnelStatsFramingCaps,
               l2tpTunnelStatsControlRxPkts,
               l2tpTunnelStatsControlRxZLB,
               l2tpTunnelStatsControlOutOfSeq,
               l2tpTunnelStatsControlOutOfWin,
               l2tpTunnelStatsControlTxPkts,
               l2tpTunnelStatsControlTxZLB,
               l2tpTunnelStatsControlAckTO,
               l2tpTunnelStatsCurrentRemoteRWS,
               l2tpTunnelStatsTxSeq,
               l2tpTunnelStatsTxSeqAck,
               l2tpTunnelStatsRxSeq,
               l2tpTunnelStatsRxSeqAck,
               l2tpTunnelStatsTotalSessions,
               l2tpTunnelStatsFailedSessions,
               l2tpTunnelStatsActiveSessions,
               l2tpTunnelStatsLastResultCode,
               l2tpTunnelStatsLastErrorCode,
               l2tpTunnelStatsLastErrorMessage,
               l2tpTunnelStatsDrainingTunnel,
               l2tpSessionStatsIfIndex,
               l2tpSessionStatsRemoteSID,
               l2tpSessionStatsUserName,
               l2tpSessionStatsState,
               l2tpSessionStatsCallType,
               l2tpSessionStatsCallSerialNumber,
               l2tpSessionStatsTxConnectSpeed,
               l2tpSessionStatsRxConnectSpeed,
               l2tpSessionStatsCallBearerType,
               l2tpSessionStatsFramingType,

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               l2tpSessionStatsPhysChanId,
               l2tpSessionStatsDNIS,
               l2tpSessionStatsCLID,
               l2tpSessionStatsSubAddress,
               l2tpSessionStatsPrivateGroupID,
               l2tpSessionStatsProxyLcp,
               l2tpSessionStatsAuthMethod,
               l2tpSessionStatsSequencingState,
               l2tpSessionStatsOutSequence,
               l2tpSessionStatsReassemblyTO,
               l2tpSessionStatsTxSeq,
               l2tpSessionStatsRxSeq
           }
           STATUS          current
           DESCRIPTION
              "A collection of objects providing status and
               statistics of the L2TP protocol, tunnels and
               sessions."
           ::= { l2tpGroups 2 }

   l2tpIpUdpGroup OBJECT-GROUP
           OBJECTS {
               l2tpUdpStatsPeerPort,
               l2tpUdpStatsLocalPort
           }
           STATUS          current
           DESCRIPTION
              "A collection of objects providing status and
               statistics of the L2TP UDP/IP transport layer."
           ::= { l2tpGroups 3 }

   l2tpDomainGroup OBJECT-GROUP
           OBJECTS {
               l2tpDomainConfigAdminState,
               l2tpDomainConfigDrainTunnels,
               l2tpDomainConfigTunnelHelloInt,
               l2tpDomainConfigTunnelIdleTO,
               l2tpDomainConfigControlRWS,
               l2tpDomainConfigControlMaxRetx,
               l2tpDomainConfigControlMaxRetxTO,
               l2tpDomainConfigPayloadSeq,
               l2tpDomainConfigReassemblyTO,
               l2tpDomainConfigProxyPPPAuth,
               l2tpDomainConfigStorageType,
               l2tpDomainConfigStatus,
               l2tpDomainStatsTotalTunnels,
               l2tpDomainStatsFailedTunnels,
               l2tpDomainStatsFailedAuths,

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               l2tpDomainStatsActiveTunnels,
               l2tpDomainStatsTotalSessions,
               l2tpDomainStatsFailedSessions,
               l2tpDomainStatsActiveSessions,
               l2tpDomainStatsDrainingTunnels,
               l2tpDomainStatsControlRxOctets,
               l2tpDomainStatsControlRxPkts,
               l2tpDomainStatsControlTxOctets,
               l2tpDomainStatsControlTxPkts,
               l2tpDomainStatsPayloadRxOctets,
               l2tpDomainStatsPayloadRxPkts,
               l2tpDomainStatsPayloadRxDiscs,
               l2tpDomainStatsPayloadTxOctets,
               l2tpDomainStatsPayloadTxPkts
           }
           STATUS          current
           DESCRIPTION
              "A collection of objects providing configuration,
               status and statistics of L2TP tunnel domains."
           ::= { l2tpGroups 4 }

   l2tpMappingGroup OBJECT-GROUP
           OBJECTS {
               l2tpTunnelMapIfIndex,
               l2tpSessionMapTunnelIfIndex,
               l2tpSessionMapLocalSID,
               l2tpSessionMapStatus
           }
           STATUS          current
           DESCRIPTION
              "A collection of objects providing index mapping."
           ::= { l2tpGroups 5 }

   l2tpSecurityGroup OBJECT-GROUP
           OBJECTS {
               l2tpDomainConfigAuth,
               l2tpDomainConfigSecret,
               l2tpDomainConfigTunnelSecurity,
               l2tpTunnelConfigAuth,
               l2tpTunnelConfigSecret,
               l2tpTunnelConfigSecurity
           }
           STATUS          current
           DESCRIPTION
              "A collection of objects providing L2TP security
               configuration."
           ::= { l2tpGroups 6 }

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   l2tpTrapGroup NOTIFICATION-GROUP
           NOTIFICATIONS {
               l2tpTunnelAuthFailure
           }
           STATUS          current
           DESCRIPTION
              "A collection of L2TP trap events as specified
               in NOTIFICATION-TYPE constructs."
           ::= { l2tpGroups 7 }

   l2tpHCPacketGroup OBJECT-GROUP
           OBJECTS {
               l2tpDomainStatsControlHCRxOctets,
               l2tpDomainStatsControlHCRxPkts,
               l2tpDomainStatsControlHCTxOctets,
               l2tpDomainStatsControlHCTxPkts,
               l2tpDomainStatsPayloadHCRxOctets,
               l2tpDomainStatsPayloadHCRxPkts,
               l2tpDomainStatsPayloadHCRxDiscs,
               l2tpDomainStatsPayloadHCTxOctets,
               l2tpDomainStatsPayloadHCTxPkts
            }
           STATUS          current
           DESCRIPTION
              "A collection of objects providing High Capacity
               64-bit counter objects."
           ::= { l2tpGroups 8 }

   END

5.0 Security Considerations

   This MIB contains readable objects whose values provide information
   related to L2TP tunnel interfaces.  There are also a number of
   objects that have a MAX-ACCESS clause of read-write and/or read-
   create, such as those which allow an administrator to dynamically
   configure tunnels.

   While unauthorized access to the readable objects is relatively
   innocuous, unauthorized access to the write-able objects could cause
   a denial of service, or could cause unauthorized creation and/or
   manipulation of tunnels.  Hence, the support for SET operations in a
   non-secure environment without proper protection can have a negative
   effect on network operations.

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   SNMPv1 by itself is such an insecure environment.  Even if the
   network itself is secure (for example by using IPSec [RFC2401]), even
   then, there is no control as to who on the secure network is allowed
   to access and SET (change/create/delete) the objects in this MIB.

   If the agent allows configuring keys (for example the
   l2tpDomainConfigSecret object) via SNMP, for use by L2TP, then the
   security of L2TP is at best only as secure as SNMP.  For this reason,
   all objects in the l2tpSecurityGroup MUST NOT be accessible via
   unencrypted messages.  It is also recommended that keys not be made
   visible through SNMP GET (or GET-NEXT or GET-BULK) messages, even if
   encryption is used.

   It is recommended that the implementers consider the security
   features as provided by the SNMPv3 framework.  Specifically, the use
   of the User-based Security Model RFC 2574 [RFC2574] and the View-
   based Access Control Model RFC 2575 [RFC2575] is recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity giving access to this MIB, is properly configured to give
   access to those objects only to those principals (users) that have
   legitimate rights to access them.

6.0 Acknowledgements

   Many thanks to the L2TP working group members who provided valuable
   input into the content and structure of this MIB.

7.0 References

   [RFC2571] Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture
             for Describing SNMP Management Frameworks", RFC 2571, April
             1999.

   [RFC1155] Rose, M. and K. McCloghrie, "Structure and Identification
             of Management Information for TCP/IP-based Internets", STD
             16, RFC 1155, May 1990.

   [RFC1212] Rose, M. and K. McCloghrie, "Concise MIB Definitions",
             STD 16, RFC 1212, March 1991.

   [RFC1215] Rose, M., "A Convention for Defining Traps for use with
             the SNMP", RFC 1215, March 1991.

   [RFC2578] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
             Rose, M. and S. Waldbusser, "Structure of Management
             Information Version 2 (SMIv2)", STD 58, RFC 2578, April
             1999.

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   [RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
             Rose, M. and S. Waldbusser, "Textual Conventions for
             SMIv2", STD 58, RFC 2579, April 1999.

   [RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
             Rose, M. and S. Waldbusser, "Conformance Statements for
             SMIv2", STD 58, RFC 2580, April 1999.

   [RFC1157] Case, J., Fedor, M., Schoffstall, M. and J. Davin,
             "Simple Network Management Protocol", STD 15, RFC 1157,
             May 1990.

   [RFC1901] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
             "Introduction to Community-based SNMPv2", RFC 1901,
             January 1996.

   [RFC1906] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
             "Transport Mappings for Version 2 of the Simple Network
             Management Protocol (SNMPv2)", RFC 1906, January 1996.

   [RFC2572] Case, J., Harrington D., Presuhn R. and B. Wijnen,
             "Message Processing and Dispatching for the Simple
             Network Management Protocol (SNMP)", RFC 2572, April
             1999.

   [RFC2574] Blumenthal, U. and B. Wijnen, "User-based Security Model
             (USM) for version 3 of the Simple Network Management
             Protocol (SNMPv3)", RFC 2574, April 1999.

   [RFC1905] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
             "Protocol Operations for Version 2 of the Simple Network
             Management Protocol (SNMPv2)", RFC 1905, January 1996.

   [RFC2573] Levi, D., Meyer, P. and B. Stewart, "SNMPv3 Applications",
             RFC 2573, April 1999.

   [RFC2575] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based
             Access Control Model (VACM) for the Simple Network
             Management Protocol (SNMP)", RFC 2575, April 1999.

   [RFC2570] Case, J., Mundy, R., Partain, D. and B. Stewart,
             "Introduction to Version 3 of the Internet-standard
             Network Management Framework", RFC 2570, April 1999.

   [RFC2661] Townsley, W., Valencia, A., Rubens, A., Pall, G., Zorn, G.
             and B. Palter, "Layer Two Tunneling Protocol - L2TP", RFC
             2661, August 1999.

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   [RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group
             MIB", RFC 2863, June 2000.

   [RFC2667] Thaler, D., "IP Tunnel MIB", RFC 2667, August 1999.

   [RFC2401] Kent, S. and R. Atkinson,  "Security Architecture for the
             Internet Protocol", RFC 2401, November 1998.

8.0 Authors' Addresses

   Evan Caves
   Occam Networks Inc.
   77 Robin Hill Road
   Santa Barbara, CA 93117

   EMail: evan@occamnetworks.com


   Pat Calhoun
   Black Storm Networks
   110 Nortech Parkway
   San Jose, CA 95134

   EMail: pcalhoun@bstormnetworks.com


   Ross Wheeler
   DoubleWide Software, Inc.
   2953 Bunker Hill Lane
   Suite 101
   Santa Clara, CA 95054

   Email: ross@doublewidesoft.com

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9.0  Full Copyright Statement

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

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   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
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Acknowledgement

   Funding for the RFC Editor function is currently provided by the
   Internet Society.