USR-L2TP-MIB

All MIBs › USR-L2TP-MIB

Organization: CommWorks Corporation, a 3Com Company

Last Updated: 2002-08-12

Category: CommWorks/3Com Access Equipment

Description: Manages L2TP tunnel and session parameters for VPN services on CommWorks/3Com equipment.

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What Is USR-L2TP-MIB?

The USR-L2TP-MIB is a private enterprise MIB defined by CommWorks (formerly U.S. Robotics, later part of 3Com) for managing Layer 2 Tunneling Protocol (L2TP) tunnels and sessions that carry PPP-based VPN traffic across IP networks. It exposes tunnel configuration alongside tunnel/session state and traffic/error counters. For hardware/software status monitoring it is used to track tunnel and session uptime, session counts, and negotiation or authentication failures that indicate the health of the VPN concentrator's L2TP software stack. It complements the IETF's standard L2TP and PPP MIB conventions used elsewhere in remote-access management rather than replacing them. It is typically deployed on CommWorks/3Com/USR remote access concentrators and VPN gateways terminating dial-up or broadband L2TP tunnels for ISPs and enterprises. Engineers can download the USR-L2TP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in USR-L2TP-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

CommWorks/3Com/USR remote access concentrator
L2TP VPN gateway

Monitoring Examples

No sample objects were supplied for this MIB, so specific table or object names cannot be confirmed here. In general, an admin managing an L2TP VPN concentrator would poll tunnel and session count objects and per-session state to detect tunnels stuck in a non-established state or sessions dropping unexpectedly. Without concrete object names to ground it, a fully specific polling example cannot be honestly constructed.

What Can Be Monitored

L2TP tunnel status
active session count
tunnel establishment failures
PPP session state

Imported Objects

From SNMPv2-SMI

Counter32
Integer32
IpAddress
MODULE-IDENTITY
OBJECT-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

RowStatus
TruthValue

From USR-DEFINITIONS-MIB

UsrConfigStatus
UsrDisplayString
common	OBJECT-IDENTITY

OIDs

OID symbolic	OID numeric	Type	Access	Description
usrL2TP	1.3.6.1.4.1.429.4.55			The commWorks enterprise defined MIB objects for L2TP
usrL2TPGlobal	1.3.6.1.4.1.429.4.55.1			The root of the L2TP global Object-Identifiers.
usrL2TPConfigTable	1.3.6.1.4.1.429.4.55.1.1		not-accessible
usrL2tpConfigEntry	1.3.6.1.4.1.429.4.55.1.1.1		not-accessible	.
I32 usrL2tpConfigIndex	1.3.6.1.4.1.429.4.55.1.1.1.1	Integer32	read-only	A unique value for each l2tp protocol stack.
T/F usrL2tpLoadBalancing	1.3.6.1.4.1.429.4.55.1.1.1.2	TruthValue	read-write	Defines If Load Balancing is enabled or not.
OCT usrL2tpDialOut	1.3.6.1.4.1.429.4.55.1.1.1.3	OCTET STRING	read-write	This variable is set through the CLI when the user manually issues a L2TP dial-out.
INT usrL2tpLnsFlag	1.3.6.1.4.1.429.4.55.1.1.1.4	INTEGER	read-write	Setting this object to a value of enabled(1) will enable the L2TP lns enable feature. Setting this object to disabled(2) will disable the L2TP LNS feature.
INT usrL2tpPasswordEncryptStyle	1.3.6.1.4.1.429.4.55.1.1.1.5	INTEGER	read-write	Original labels were Draft-3 and Draft-6. This value defines the encryption style for tunnel password as retrieved from RADIUS. It indicates whether or not a salt or secret key value will be used to encrypt the password.
INT usrL2TPLcpRenegotiateAtLNS	1.3.6.1.4.1.429.4.55.1.1.1.6	INTEGER	read-write	This flag is used to enable/disable LCP renegotiation for calls when doing proxy LCP on LNS
T/F usrL2tpAuthenticationRequiredOnOutgoingTunnels	1.3.6.1.4.1.429.4.55.1.1.1.7	TruthValue	read-write	When set to a value of true(1) requires that all outgoing tunnels request tunnel authentication.
I32 usrL2tpNumberOfEchoRetransmissions	1.3.6.1.4.1.429.4.55.1.1.1.8	Integer32	read-write	This object defines the number of Hello retransmission's which the L2TP stack will attempt before assuming that the peer is no longer reachable. The default value for this object is five (5).
I32 usrL2tpEchoRetransmissionInterval	1.3.6.1.4.1.429.4.55.1.1.1.9	Integer32	read-write	This object defines the number of seconds between each retransmission.
usrL2tpTunnel	1.3.6.1.4.1.429.4.55.2
usrL2tpTunnelQueryTable	1.3.6.1.4.1.429.4.55.2.1		not-accessible	A table containing the READ ONLY propietary extension parameters for L2TP Tunnel MIB.
usrL2tpTunnelQueryEntry	1.3.6.1.4.1.429.4.55.2.1.1		not-accessible
I32 usrL2tpTunnelLogicalStackIndex	1.3.6.1.4.1.429.4.55.2.1.1.1	Integer32	read-only	This object contains a reference to the logical l2tp protocol stack and must be the same as the l2tpConfigIndex.
I32 usrL2tpTunnelLocalControlTunnelId	1.3.6.1.4.1.429.4.55.2.1.1.2	Integer32	read-only	This object contains the local tunnel Identifier.
INT usrL2tpTunnelSecurityLevel	1.3.6.1.4.1.429.4.55.2.1.1.3	INTEGER	read-only	This field contains the security level of the tunnel.
I32 usrL2tpTunnelDisconnect	1.3.6.1.4.1.429.4.55.2.1.1.4	Integer32	read-write	This object is used to disconnect a specific tunnel.
usrL2tpSession	1.3.6.1.4.1.429.4.55.3			The root of L2TP Session Module Object-identifiers.
usrL2tpSessionTable	1.3.6.1.4.1.429.4.55.3.1		not-accessible
usrL2tpSessionEntry	1.3.6.1.4.1.429.4.55.3.1.1		not-accessible	.
I32 usrL2tpSessionLogicalStackIndex	1.3.6.1.4.1.429.4.55.3.1.1.1	Integer32	read-only	This object contains a reference to the logical l2tp protocol stack and must be the same as the l2tpConfigIndex and l2tpTunelLogicalStackIndex.
I32 usrL2tpSessionTunnelID	1.3.6.1.4.1.429.4.55.3.1.1.2	Integer32	read-only	This object contains the control Channel Tunnel identifier for this session
I32 usrL2tpSessionLocalCallID	1.3.6.1.4.1.429.4.55.3.1.1.3	Integer32	read-only	This object contains the local call identifier for the session.
I32 usrL2tpSessionDisconnect	1.3.6.1.4.1.429.4.55.3.1.1.4	Integer32	read-write	This object is used to disconnect a specific tunnel.
usrL2tpHostTable	1.3.6.1.4.1.429.4.55.4		not-accessible	The table of L2TP LNSs.
usrL2tpHostEntry	1.3.6.1.4.1.429.4.55.4.1		not-accessible	A (conceptual) entry for one pptp Host.
I32 usrL2tpHostIndex	1.3.6.1.4.1.429.4.55.4.1.1	Integer32	not-accessible	The logical identifier of the Host Table.
IP usrL2tpHostAddress	1.3.6.1.4.1.429.4.55.4.1.2	IpAddress	read-write	The specified or resolved ip address of the named Host.
ROW usrL2tpHostStatus	1.3.6.1.4.1.429.4.55.4.1.3	RowStatus	read-write	The status of this row of the Host Table.
OCT usrL2tpSharedSecret	1.3.6.1.4.1.429.4.55.4.1.4	OCTET STRING	read-write	The Shared Secret For This Host.
T/F usrL2tpSharedSecretStatus	1.3.6.1.4.1.429.4.55.4.1.5	TruthValue	read-write	The Shared Secret Status For This Host.
INT usrL2tpSecurityLevel	1.3.6.1.4.1.429.4.55.4.1.6	INTEGER	read-write	The Security Level For This Host.
STR usrL2TPConfigFileName	1.3.6.1.4.1.429.4.55.5	UsrDisplayString	read-only	The name of a ConfigFile to read/write permanent database records. If the value of this object is an empty string, then the L2TP process uses the default name `@file://L2tpProcess.cfg'.
USR usrL2TPCFMStatusFlag	1.3.6.1.4.1.429.4.55.6	UsrConfigStatus	read-write	CFM Config Flag
usrL2tpStatsTable	1.3.6.1.4.1.429.4.55.7		not-accessible	A table containing a single row containing new L2TP counters
usrL2tpStatsEntry	1.3.6.1.4.1.429.4.55.7.1		not-accessible
I32 usrL2tpStatsIndex	1.3.6.1.4.1.429.4.55.7.1.1	Integer32	read-only	Should be the same value as l2tpConfigIndex and l2tpStatsIndex to reference the same logical l2tp protocol stack. On HiPer ARC, this index is always 1
C32 usrL2tpStatsTunnelSetupAttempts	1.3.6.1.4.1.429.4.55.7.1.2	Counter32	read-only	Count of L2TP tunnel setup attempts. Discontinuity is indicated by usrL2tpStatsCountersResetTime.
C32 usrL2tpStatsTunnelSetupCompleteds	1.3.6.1.4.1.429.4.55.7.1.3	Counter32	read-only	Count of L2TP tunnel setups completed (L2TP tunnel setup attempts that reached the established state). Discontinuity is indicated by usrL2tpStatsCountersResetTime.
C32 usrL2tpStatsTunnelSetupFaileds	1.3.6.1.4.1.429.4.55.7.1.4	Counter32	read-only	Count of L2TP tunnel setups that failed (L2TP tunnel setup attempts that terminated without reaching the established state). Discontinuity is indicated by usrL2tpStatsCountersResetTime.
U32 usrL2tpStatsCountersResetTime	1.3.6.1.4.1.429.4.55.7.1.5	Unsigned32	read-write	Reading: Time the L2TP statistics counters were last reset. Resetting counters causes a discontinuity in the monotonically increasing value of the counters. Management stations that sample these counters need also to sample this object so that they can know that a discontinuity occured with respect to the previous sample. Its value is number of seconds since EPOCH. EPOCH is seconds since 00:00:00 UTC, Jan 1, 1970. Writing: Writing 0 causes the following global L2TP stats to be reset to 0: l2tpStatsFailedAuthentications l2tpStatsMalformedPackets l2tpStatsControlTunnelRecvPackets l2tpStatsControlTunnelWithDataRecvPackets l2tpStatsControlTunnelWithoutDataRecvPackets l2tpStatsProcessedControlTunnelRecvPackets l2tpStatsInSequenceControlTunnelRecvPackets l2tpStatsOutSequenceControlTunnelRecvPackets l2tpStatsInOrderControlTunnelRecvPackets l2tpStatsOutOfOrderControlTunnelRecvPackets l2tpStatsFlowDiscardedControlTunnelRecvPackets l2tpStatsOutOfOrderDiscardedControlTunnelRecvPackets l2tpStatsControlTunnelSendPackets l2tpStatsControlTunnelWithdataSendPackets l2tpStatsControlTunnelWithoutdataSendPackets l2tpStatsControlTunnelFlowControlTimeouts l2tpStatsLocalControlTunnelFlowControlEnables l2tpStatsRemoteControlTunnelFlowControlEnables l2tpStatsControlTunnelReassemblyTimeouts l2tpStatsDataTunnelRecvPackets l2tpStatsDataTunnelWithdataRecvPackets l2tpStatsDataTunnelWithoutdataRecvPackets l2tpStatsProcessedDataTunnelRecvPackets l2tpStatsInSequenceDataTunnelRecvPackets l2tpStatsOutSequenceDataTunnelRecvPackets l2tpStatsInOrderDataTunnelRecvPackets l2tpStatsOutOfOrderDataTunnelRecvPackets l2tpStatsFlowDiscardedDataTunnelRecvPackets l2tpStatsOutOfOrderDiscardedDataTunnelRecvPackets l2tpStatsDataTunnelSendPackets l2tpStatsDataTunnelWithdataSendPackets l2tpStatsDataTunnelWithoutdataSendPackets l2tpStatsDataTunnelFlowControlTimeouts l2tpStatsLocalDataTunnelFlowControlEnables l2tpStatsRemoteDataTunnelFlowControlEnables l2tpStatsDataTunnelReassemblyTimeouts usrL2tpStatsTunnelSetupAttempts usrL2tpStatsTunnelSetupCompleteds usrL2tpStatsTunnelSetupFaileds Writing other values are rejected.

RFC description

Layer 2 Tunneling Protocol configuration for 3Com CommWorks devices managing tunnel authentication and echo parameters.

Start monitoring CommWorks/3Com/USR remote access concentrator, L2TP VPN gateway (tunnel/session uptime and error-counter status) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download USR-L2TP-MIB

What Is USR-L2TP-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description