HH3C-L2TP-MIB

All MIBs › HH3C-L2TP-MIB

Organization: Hangzhou H3C Tech. Co., Ltd.

Last Updated: 2013-07-05

Category: Protocol: L2TP, VPN and Security, Vendor: H3C/HH3C

Description: Manages L2TP tunnel and session configuration, statistics, and control messages on H3C VPN access devices.

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What Is HH3C-L2TP-MIB?

This is a proprietary H3C MIB for managing Layer 2 Tunneling Protocol (L2TP) tunnels and sessions used for VPN access, exposing global scalar statistics such as total tunnel and session counts plus a session establishment rate. It is primarily a scalar-statistics MIB providing a system-wide view of L2TP tunnel/session load on a VPN access device acting as LAC or LNS. Its monitoring value is in tracking software/service load and health: total tunnel/session counts reveal capacity utilization, and session rate indicates connection churn that could signal a flood of new VPN connections or instability in tunnel establishment. No explicit external MIB dependency is stated, though L2TP tunnels typically ride over the standard IP/UDP stack monitored via IF-MIB/IP-MIB on the same device. It is typically deployed on H3C routers/VPN gateways acting as L2TP Access Concentrators (LAC) or L2TP Network Servers (LNS) for remote-access VPN services. Engineers can download the HH3C-L2TP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in HH3C-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

H3C router/VPN gateway (L2TP LAC/LNS)

Monitoring Examples

Polling hh3cL2tpStatsTotalTunnels and hh3cL2tpStatsTotalSessions gives a real-time count of active L2TP tunnels and sessions on the device, useful for capacity trending. A sudden spike in hh3cL2tpSessionRate could indicate a wave of new VPN connection attempts, potentially normal remote-access ramp-up or, if unexpected, a sign of connection-flood activity against the LNS/LAC.

What Can Be Monitored

total active L2TP tunnels
total active L2TP sessions
L2TP session establishment rate

Imported Objects

From HH3C-OID-MIB

hh3cCommon

OBJECT-IDENTITY

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

How to Use in IPNetwork Monitor

Example using hh3cL2tpStatsTotalTunnels OID:

Select an H3C router/VPN gateway acting as L2TP LAC/LN 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 hh3cL2tpStatsTotalTunnels into the Find box to locate it in the OID tree, then select it and click OK. The total number of tunnels at the time of querying. 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

OID symbolic	OID numeric	Type	Access	Description
hh3cL2tp	1.3.6.1.4.1.25506.2.139			This MIB contains objects to manage configuration of L2TP. There are no constraints on this MIB.
hh3cL2tpObjects	1.3.6.1.4.1.25506.2.139.1
hh3cL2tpScalar	1.3.6.1.4.1.25506.2.139.1.1
hh3cL2tpStats	1.3.6.1.4.1.25506.2.139.1.1.1
C32 hh3cL2tpStatsTotalTunnelsEx	1.3.6.1.4.1.25506.2.139.1.1.1.1	Counter32	read-only	The total number of tunnels at the time of querying.
C32 hh3cL2tpStatsTotalSessions	1.3.6.1.4.1.25506.2.139.1.1.1.2	Counter32	read-only	The total number of sessions at the time of querying.
I32 hh3cL2tpSessionRate	1.3.6.1.4.1.25506.2.139.1.1.1.3	Integer32	read-only	The number of sessions that were created in the previous second.

RFC description

H3C vendor-private MIB for Layer 2 Tunneling Protocol (L2TP) tunnel configuration and status monitoring.

Start monitoring H3C router/VPN gateway acting as L2TP LAC/LNS 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 HH3C-L2TP-MIB