HPN-ICF-L2TP-MIB

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Last Updated: 2013-07-05

Category: Protocol: L2TP, Vendor: H3C/HH3C, Vendor: HP/HPE

Description: Manages L2TP tunnel and session configuration for broadband aggregation on HP/Comware access routers.

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What Is HPN-ICF-L2TP-MIB?

HPN-ICF-L2TP-MIB is an HP/H3C (Comware) MIB for managing Layer 2 Tunneling Protocol (L2TP) configuration used in broadband aggregation on HP/Comware access routers, exposing scalar statistics for tunnel and session activity along with a session establishment rate. It provides system-wide L2TP status objects rather than a per-tunnel table, giving a coarse view of the L2TP service's overall load. This MIB is used to monitor the software/service status of the L2TP tunneling subsystem, letting an operator track hpnicfL2tpStatsTotalTunnels and hpnicfL2tpStatsTotalSessions to see overall subscriber tunnel/session load, and watch hpnicfL2tpSessionRate to detect an abnormal surge or collapse in new session establishment that could indicate a broadband access outage or a mass reconnect event. It is a vendor-specific HP/Comware MIB and, being an implementation of the IETF L2TP protocol, is conceptually tied to the L2TP standard though no explicit MIB dependency is stated. It is typically deployed on HP/Comware broadband remote access servers (BRAS) or aggregation routers terminating L2TP tunnels from DSL/PPPoE access networks. Engineers can download the HPN-ICF-L2TP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in HPN-ICF-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

HP/Comware broadband access router (BRAS/aggregation)

Monitoring Examples

An operator would poll hpnicfL2tpStatsTotalTunnels and hpnicfL2tpStatsTotalSessions to confirm the expected number of subscriber tunnels and sessions are currently established on the access router. A sudden drop in hpnicfL2tpSessionRate combined with a falling hpnicfL2tpStatsTotalSessions count would indicate subscribers are failing to establish new L2TP sessions, pointing to an upstream authentication or tunnel-server problem.

What Can Be Monitored

total active L2TP tunnels
total active L2TP sessions
session establishment rate

Imported Objects

From HPN-ICF-OID-MIB

hpnicfCommon

OBJECT-IDENTITY

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

How to Use in IPNetwork Monitor

Example using hpnicfL2tpStatsTotalTunnels OID:

Select a HP/Comware broadband access router (BRAS/aggregation, L2TP) 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 hpnicfL2tpStatsTotalTunnels 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
hpnicfL2tp	1.3.6.1.4.1.11.2.14.11.15.2.139			This MIB contains objects to manage configuration of L2TP. There are no constraints on this MIB.
hpnicfL2tpObjects	1.3.6.1.4.1.11.2.14.11.15.2.139.1
hpnicfL2tpScalar	1.3.6.1.4.1.11.2.14.11.15.2.139.1.1
hpnicfL2tpStats	1.3.6.1.4.1.11.2.14.11.15.2.139.1.1.1
C32 hpnicfL2tpStatsTotalTunnelsEx	1.3.6.1.4.1.11.2.14.11.15.2.139.1.1.1.1	Counter32	read-only	The total number of tunnels at the time of querying.
C32 hpnicfL2tpStatsTotalSessions	1.3.6.1.4.1.11.2.14.11.15.2.139.1.1.1.2	Counter32	read-only	The total number of sessions at the time of querying.
I32 hpnicfL2tpSessionRate	1.3.6.1.4.1.11.2.14.11.15.2.139.1.1.1.3	Integer32	read-only	The number of sessions that were created in the previous second.

RFC description

HP/Huawei HP-ICF (Intelligent Converged Fabric) vendor-private MIB managing Layer 2 Tunneling Protocol (L2TP) tunnel configuration and session statistics.

Start monitoring HP/Comware broadband access router (BRAS/aggregation, L2TP) 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 HPN-ICF-L2TP-MIB