RBN-X-AAL5-VCL-STAT-MIB

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Organization: RedBack Networks, Inc.

Last Updated: 1998-04-17

Category: ATM, Vendor: Ericsson

Description: Provides extended ATM AAL5 virtual channel link (VCL) performance statistics on Redback SmartEdge BRAS platforms.

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What Is RBN-X-AAL5-VCL-STAT-MIB?

RBN-X-AAL5-VCL-STAT-MIB is a Redback Networks (now Ericsson) enterprise MIB deployed on SmartEdge multi-service edge routers and BRAS platforms, providing extended performance statistics for ATM AAL5 virtual channel links (VCLs). It exposes packet- and octet-level traffic counters per VCL, mirroring the direction the IETF atommib working group was taking with the ATM2-MIB's atmAal5VclStatTable, positioned here as an experimental/vendor placeholder ahead of standardization. As a pure statistics MIB, it is primarily useful for performance monitoring rather than hardware/environmental health -- operators use it to verify ATM VCL throughput and detect traffic anomalies such as stalled or congested circuits, though it does not cover CPU, memory, temperature, or power status. It explicitly depends on/mirrors the IETF ATM2-MIB draft (draft-ietf-atommib-atm2-XX.txt) and is expected to be obsoleted once that standard is finalized. It is used in service-provider ATM access networks running Redback/Ericsson SmartEdge platforms that terminate AAL5-encapsulated ATM circuits, often for legacy DSL/ATM broadband aggregation. Network engineers evaluating or troubleshooting this functionality can download the RBN-X-AAL5-VCL-STAT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in RBN-X-AAL5-VCL-STAT-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

Redback/Ericsson SmartEdge BRAS with ATM interfaces

Monitoring Examples

An administrator would poll rbnXAtmAal5VclStatTable (rbnXAtmAal5VclStatEntry) for rbnXAtmAal5VclInPkts, rbnXAtmAal5VclOutPkts, rbnXAtmAal5VclInOctets, and rbnXAtmAal5VclOutOctets on a per-VCL basis to baseline normal traffic levels on a subscriber's ATM circuit. A sudden drop in rbnXAtmAal5VclInPkts/OutPkts while the underlying interface remains up would indicate a stalled AAL5 session or misconfigured VCL, prompting further investigation into the ATM PVC. Comparing octet counts across VCLs also helps identify circuits nearing their provisioned bandwidth.

What Can Be Monitored

AAL5 VCL inbound/outbound packet counts
AAL5 VCL inbound/outbound octet counts
per-VCL ATM traffic statistics

Imported Objects

From ATM-MIB

atmVclVci	OBJECT-TYPE
atmVclVpi	OBJECT-TYPE

From IF-MIB

ifIndex

OBJECT-TYPE

From RBN-SMI

rbnExperiment

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
OBJECT-TYPE

How to Use in IPNetwork Monitor

Example using rbnXAtmAal5VclInPkts OID:

Select a Redback/Ericsson SmartEdge BRAS with ATM interface (AAL5 VCL traffic statistics) 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 rbnXAtmAal5VclInPkts into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of AAL5 CPCS PDUs received on the AAL5 VCC at the interface identified by the ifIndex. 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
rbnXAal5VclStatMIB	1.3.6.1.4.1.2352.3.1			The MIB for instrumenting statistics associated with an ATM VCL. This MIB is positioned in the RedBack Networks experimental MIB space because it mirrors MIB objects currently being developed by the IETF atommib Working Group, namely the atmAal5VclStatTable objects found in the ATM2-MIB (draft-ietf-atommib-atm2-XX.txt). At such time as the ATM2-MIB is placed on the IETF standards track, this MIB will be obsoleted in favor of the IETF one
rbnXAal5VclStatMIBObjects	1.3.6.1.4.1.2352.3.1.1
rbnXAtmAal5VclStatTable	1.3.6.1.4.1.2352.3.1.1.1		not-accessible	This table provides a collection of objects providing AAL5 configuration and performance statistics of a VCL.
rbnXAtmAal5VclStatEntry	1.3.6.1.4.1.2352.3.1.1.1.1		not-accessible	Each entry in this table represents a VCL.
C32 rbnXAtmAal5VclInPktsEx	1.3.6.1.4.1.2352.3.1.1.1.1.1	Counter32	read-only	The number of AAL5 CPCS PDUs received on the AAL5 VCC at the interface identified by the ifIndex.
C32 rbnXAtmAal5VclOutPkts	1.3.6.1.4.1.2352.3.1.1.1.1.2	Counter32	read-only	The number of AAL5 CPCS PDUs transmitted on the AAL5 VCC at the interface identified by the ifIndex.
C32 rbnXAtmAal5VclInOctets	1.3.6.1.4.1.2352.3.1.1.1.1.3	Counter32	read-only	The number of octets contained in AAL5 CPCS PDUs received on the AAL5 VCC at the interface identified by the ifIndex.
C32 rbnXAtmAal5VclOutOctets	1.3.6.1.4.1.2352.3.1.1.1.1.4	Counter32	read-only	The number of octets contained in AAL5 CPCS PDUs transmitted on the AAL5 VCC at the interface identified by the ifIndex.
rbnXAal5VclStatMIBConformance	1.3.6.1.4.1.2352.3.1.2
rbnXAal5VclStatMIBGroups	1.3.6.1.4.1.2352.3.1.2.1
rbnXAal5VclStatGroup	1.3.6.1.4.1.2352.3.1.2.1.1			A collection of objects providing supplemental AAL5 VCL information beyond that supplied by IETF standards-track MIBs
rbnXAal5VclStatMIBCompliances	1.3.6.1.4.1.2352.3.1.2.2
rbnXAal5VclStatMIBCompliance	1.3.6.1.4.1.2352.3.1.2.2.1			The compliance statement for RedBack Networks SNMP entities which represent AAL5 VCL statistics

RFC description

Provides AAL5 (ATM Adaptation Layer 5) statistics for virtual circuit links on ATM networks, tracking packet and octet counters.

Start monitoring Redback/Ericsson SmartEdge BRAS with ATM interfaces (AAL5 VCL traffic statistics) 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 RBN-X-AAL5-VCL-STAT-MIB