Juniper-L2TP-MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › Juniper-L2TP-MIB

Organization: Juniper Networks, Inc.

Last Updated: 2006-04-20

Category: Protocol: L2TP, Vendor: Juniper

Description: Provides managed objects for L2TP tunnel status, session counts, and statistics on Juniper Networks E-series broadband access routers.

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What Is Juniper-L2TP-MIB?

Juniper-L2TP-MIB is a Juniper Networks enterprise MIB that manages Layer 2 Tunneling Protocol (L2TP) functionality on Juniper's E-series broadband services routers, used for terminating subscriber PPP-over-L2TP tunnels in broadband access networks. It exposes system-wide L2TP configuration objects controlling tunnel behavior, such as timeouts, retransmission counts, and load-balancing/failover policy, alongside a notifications group for L2TP-related trap events. Its primary monitoring value is software/protocol-state oriented: juniL2tpSysConfigAdminState reflects whether L2TP processing is administratively enabled, and juniL2tpTraps deliver operational events (such as tunnel failures) that indicate service-affecting problems rather than physical hardware faults. It depends on the general L2TP protocol standard (RFC 2661) for the underlying tunneling semantics it configures and monitors. It is typically deployed by broadband/ISP operators running Juniper E-series edge routers that terminate large numbers of subscriber L2TP tunnels, where Juniper-L2TP-MIB SNMP monitoring tracks tunnel state at scale.

IPNetwork Monitor allows you to monitor SNMP objects defined in Juniper-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

  • Juniper Networks E-series broadband services routers

Monitoring Examples

An operator would poll juniL2tpSysConfigAdminState to confirm L2TP service is enabled, and check juniL2tpSysConfigTunnelIdleTimeout and juniL2tpSysConfigControlRetransmissions to verify tunnel-resilience settings are as expected during a troubleshooting session. Subscribing to juniL2tpTrapControl-governed notifications under juniL2tpTraps would alert the NOC to tunnel-switching events or failover activity, for example when juniL2tpSysConfigFailoverWithinPreference-driven failover kicks in unexpectedly, indicating a peer LNS/LAC reachability problem.

What Can Be Monitored

  • L2TP administrative state
  • tunnel idle timeout
  • control message retransmission counts
  • tunnel failover/load-balancing events
  • tunnel switching status
Imported Objects

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From Juniper-MIBs

juniMibsMODULE-IDENTITY

From Juniper-TC

JuniEnable

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using juniL2tpSysStatusTotalDestinations OID:

Select a Juniper Networks E-series broadband services router (L2TP tunnel termination) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type juniL2tpSysStatusTotalDestinations into the Find box to locate it in the OID tree, then select it and click OK. It reports the number of destination creations attempted. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

Juniper Layer 2 Tunneling Protocol MIB for monitoring and managing L2TP tunnels and sessions on Juniper devices. Enables SNMP-based monitoring of L2TP functionality in Juniper Junos OS.

Start monitoring Juniper Networks E-series broadband services router (L2TP tunnel termination) 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 Juniper-L2TP-MIB