USR-PPPOE-MIB

All MIBs › USR-PPPOE-MIB

Organization: CommWorks Corporation, a 3Com Company

Last Updated: 2002-05-01

Category: CommWorks/3Com Access Equipment

Description: Manages PPPoE session discovery, authentication, and subscriber statistics on CommWorks/3Com equipment.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock 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.

What Is USR-PPPOE-MIB?

USR-PPPoE-MIB is a CommWorks/3Com enterprise MIB for managing PPP over Ethernet (PPPoE) session discovery, authentication, and subscriber statistics on their broadband access equipment. It exposes per-interface PPPoE configuration (enable/disable, config file name) along with session counters covering active and total historical sessions, and discovery-phase packet statistics (PADI/PADR requests and rejections). This is chiefly a software/protocol status MIB used to monitor subscriber session health: how many PPPoE sessions are currently active, whether discovery packets are being rejected (indicating authentication or capacity problems), and whether an interface's PPPoE service is administratively enabled. It builds on standard PPPoE (RFC 2516) concepts and complements the broader PPP-related MIBs used on the same subscriber access platform. It is typically deployed on 3Com/CommWorks broadband remote access servers (BRAS) terminating DSL or cable subscriber PPPoE sessions. Engineers can download the USR-PPPOE-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in USR-PPPOE-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

3Com/CommWorks broadband remote access server (BRAS)

Monitoring Examples

An admin would poll usrPPPoENumberSessions against usrPPPoETotalNumberSessions on usrPPPoEInterfaceTable entries to see current versus cumulative subscriber session counts, watching for a sudden drop indicating a mass session failure. Rising usrPPPoENumberPADIRejected or usrPPPoENumberPADRRejected counters would reveal that new subscriber connection attempts are being refused, often due to capacity limits or authentication issues, while usrPPPoEInterfaceEnabled confirms whether the service is administratively active on a given interface.

What Can Be Monitored

active PPPoE session count
total historical session count
PADI requests received/rejected
PADR requests received/rejected
per-interface PPPoE enable status

Imported Objects

From SNMPv2-SMI

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

From SNMPv2-TC

DisplayString
TruthValue

From USR-DEFINITIONS-MIB

UsrConfigStatus
UsrDisplayString
common	OBJECT-IDENTITY

How to Use in IPNetwork Monitor

Example using usrPPPoENumberSessions OID:

Select a 3Com/CommWorks broadband remote access server (BRAS) (PPPoE session count/discovery-packet status) 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 usrPPPoENumberSessions into the Find box to locate it in the OID tree, then select it and click OK. The number of Active PPPoE Sessions. 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
usrPPPoE	1.3.6.1.4.1.429.4.79			The commWorks enterprise defined MIB objects for PPP over Ethernet.
usrPPPoEInterfaceTable	1.3.6.1.4.1.429.4.79.1		not-accessible	The table listing the interfaces on which PPPoE is enabled.
usrPPPoEInterfaceEntry	1.3.6.1.4.1.429.4.79.1.1		not-accessible	An entry representing an interface on which PPPoE is enabled.
STR usrPPPoEInterfaceName	1.3.6.1.4.1.429.4.79.1.1.1	DisplayString	not-accessible	The interface name for which PPPoE is enabled.
T/F usrPPPoEInterfaceEnabled	1.3.6.1.4.1.429.4.79.1.1.2	TruthValue	read-write	Whether PPPoE is enabled or not.
STR usrPPPoEConfigFileName	1.3.6.1.4.1.429.4.79.2	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 PPPoE process uses the default name `@file://PPPoEProcess.cfg'.
USR usrPPPoECFMStatusFlag	1.3.6.1.4.1.429.4.79.3	UsrConfigStatus	read-write	CFM Config Flag
C32 usrPPPoENumberSessionsEx	1.3.6.1.4.1.429.4.79.4	Counter32	read-only	The number of Active PPPoE Sessions
C32 usrPPPoETotalNumberSessions	1.3.6.1.4.1.429.4.79.5	Counter32	read-only	The total number of PPPoE Sessions since reboot
C32 usrPPPoENumberPADIRejected	1.3.6.1.4.1.429.4.79.6	Counter32	read-only	The number of PADI discarded
C32 usrPPPoENumberPADIReceived	1.3.6.1.4.1.429.4.79.7	Counter32	read-only	The number of PPPoE PADI received
C32 usrPPPoENumberPADRRejected	1.3.6.1.4.1.429.4.79.8	Counter32	read-only	The number of PPPoE PADR discarded
C32 usrPPPoENumberPADRReceived	1.3.6.1.4.1.429.4.79.9	Counter32	read-only	The number of PPPoE PADR received
C32 usrPPPoENumberPADOTransmitted	1.3.6.1.4.1.429.4.79.10	Counter32	read-only	The number of PPPoE PADO transmitted
C32 usrPPPoENumberPADSTransmitted	1.3.6.1.4.1.429.4.79.11	Counter32	read-only	The number of PPPoE PADS transmitted
C32 usrPPPoENumberPADT	1.3.6.1.4.1.429.4.79.12	Counter32	read-only	The number of PPPoE PADT exchanged
C32 usrPPPoENumberBadPackets	1.3.6.1.4.1.429.4.79.13	Counter32	read-only	The number of bad PPPoE packets
U32 usrPPPoECounterResetTime	1.3.6.1.4.1.429.4.79.14	Unsigned32	read-write	The last time PPPoE counters were reset. This value is UCT based.
I32 usrPPPoEMaxTotalSessions	1.3.6.1.4.1.429.4.79.15	Integer32	read-write	The number of maximum allowed PPPoE sessions
I32 usrPPPoEMaxSessionsPerHost	1.3.6.1.4.1.429.4.79.16	Integer32	read-write	The number of maximum allowed PPPoE sessions to a peer
usrPPPoESession	1.3.6.1.4.1.429.4.79.17			The root of PPPoE Session Table
usrPPPoESessionTable	1.3.6.1.4.1.429.4.79.17.1		not-accessible
usrPPPoESessionEntry	1.3.6.1.4.1.429.4.79.17.1.1		not-accessible	Table of PPPoE sessions in the Access Concentrator
I32 usrPPPoESessionID	1.3.6.1.4.1.429.4.79.17.1.1.1	Integer32	read-only	This object contains the session identifier for this session
STR usrPPPoEPeerAddress	1.3.6.1.4.1.429.4.79.17.1.1.2	DisplayString	read-only	This object contains the MAC address for the session peer.
usrPPPoEServiceNameTable	1.3.6.1.4.1.429.4.79.18		not-accessible	The table listing the service names configured for PPPoE.
usrPPPoEServiceNameEntry	1.3.6.1.4.1.429.4.79.18.1		not-accessible	An entry representing service name enabled for PPPoE
STR usrPPPoEServiceName	1.3.6.1.4.1.429.4.79.18.1.1	DisplayString	not-accessible	The service name enabled for PPPoE.
T/F usrPPPoEServiceNameStatus	1.3.6.1.4.1.429.4.79.18.1.2	TruthValue	read-write	Whether pppoe service name is enabled or not.

RFC description

PPP over Ethernet (PPPoE) session management and configuration for CommWorks/3Com network access devices.

Start monitoring 3Com/CommWorks broadband remote access server (BRAS) (PPPoE session count/discovery-packet 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-PPPOE-MIB