H3C-AAL5-MIB

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Organization: Hangzhou H3C Technologies Co., Ltd.

Last Updated: 2004-11-04

Category: ATM, Vendor: H3C/HH3C

Description: H3C MIB for managing ATM Adaptation Layer 5 (AAL5) virtual connections and associated performance counters.

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What Is H3C-AAL5-MIB?

H3C-AAL5-MIB is an H3C vendor MIB that extends ATM management by exposing AAL5 (ATM Adaptation Layer 5)-specific objects not covered by the standard ATM MIB (RFC 1695). It defines a table of AAL5 virtual channel connections (VCCs) identified by VPI/VCI pairs, tracking per-VCC packet and octet counters in both directions along with connection state. Its monitoring value is centered on interface/connection performance and fault status rather than physical hardware sensors: administrators can track h3cAal5VccInPkts/OutPkts and h3cAal5VccInOctets/OutOctets for throughput trending, and h3cAal5VccState to detect a VCC that has gone down or is not operating as expected. It explicitly complements RFC 1695 (the standard ATM MIB), filling gaps in AAL5-layer detail that the IETF standard does not cover. It is typically deployed on H3C routers and switches equipped with ATM interfaces in service-provider or enterprise WAN networks using ATM/AAL5 virtual circuits. Engineers can download the H3C-AAL5-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in H3C-AAL5-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/switch with ATM interfaces

Monitoring Examples

An administrator would poll the h3cAal5VccTable (h3cAal5VccEntry, indexed by h3cAal5VccVpi and h3cAal5VccVci) to check h3cAal5VccState for a given virtual channel connection, flagging any VCC that has transitioned out of an operational state. h3cAal5VccInPkts/OutPkts and h3cAal5VccInOctets/OutOctets would be trended over time to spot a sudden drop in traffic that could indicate an upstream ATM circuit fault or misconfiguration on that VPI/VCI pair.

What Can Be Monitored

AAL5 VCC operational state
per-VCC inbound/outbound packet counts
per-VCC inbound/outbound octet counts
VPI/VCI connection inventory

Imported Objects

From HUAWEI-3COM-OID-MIB

h3cAAL5

OBJECT-IDENTITY

From RFC1213-MIB

ifIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

How to Use in IPNetwork Monitor

Example using h3cAal5VccInPkts OID:

Select an H3C router/switch with ATM interface (AAL5 VCC stats) 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 h3cAal5VccInPkts 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 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
h3cAAL5MIB	1.3.6.1.4.1.2011.10.2.21.1			This MIB file provides AAL5 specific information that are excluded by RFC 1695
h3cAal5MIBTraps	1.3.6.1.4.1.2011.10.2.21.1.0
NTF h3cAal5VccStateChange	1.3.6.1.4.1.2011.10.2.21.1.0.1			The status of AAL5 VCC.
h3cAal5MIBObjects	1.3.6.1.4.1.2011.10.2.21.1.1
h3cAal5VccTable	1.3.6.1.4.1.2011.10.2.21.1.1.1		not-accessible	This table extends AAL5 VCC performance parameters which definded in aal5VccEntry of RFC1695.
h3cAal5VccEntry	1.3.6.1.4.1.2011.10.2.21.1.1.1.1		not-accessible	This list contains the additional AAL5 VCC performance parameters which are not definded in aal5VccEntry of RFC1695.
I32 h3cAal5VccVpi	1.3.6.1.4.1.2011.10.2.21.1.1.1.1.1	Integer32	not-accessible	The VPI value of the AAL5 VCC.
I32 h3cAal5VccVci	1.3.6.1.4.1.2011.10.2.21.1.1.1.1.2	Integer32	not-accessible	The VCI value of the AAL5 VCC.
C32 h3cAal5VccInPktsEx	1.3.6.1.4.1.2011.10.2.21.1.1.1.1.3	Counter32	read-only	The number of AAL5 CPCS PDUs received.
C32 h3cAal5VccOutPkts	1.3.6.1.4.1.2011.10.2.21.1.1.1.1.4	Counter32	read-only	The number of AAL5 CPCS PDUs transmitted.
C32 h3cAal5VccInOctets	1.3.6.1.4.1.2011.10.2.21.1.1.1.1.5	Counter32	read-only	The number of AAL5 CPCS PDU octets received.
C32 h3cAal5VccOutOctets	1.3.6.1.4.1.2011.10.2.21.1.1.1.1.6	Counter32	read-only	The number of AAL5 CPCS PDU octets transmitted.
INT h3cAal5VccState	1.3.6.1.4.1.2011.10.2.21.1.1.1.1.7	INTEGER	read-only	Indicates whether the particular virtual circuit is operational. 'Active' indicates the particular virtual circuit is operational. 'Inactive' indicates the circuit is temporarily disabled. 'Invalid' indicates the circuit is deleted
h3cAal5MIBConformance	1.3.6.1.4.1.2011.10.2.21.1.3
h3cAal5MIBCompliances	1.3.6.1.4.1.2011.10.2.21.1.3.1
h3cAal5MIBCompliance	1.3.6.1.4.1.2011.10.2.21.1.3.1.1			The compliance statement.
h3cAal5MIBGroups	1.3.6.1.4.1.2011.10.2.21.1.3.2
h3cAal5MIBGroup	1.3.6.1.4.1.2011.10.2.21.1.3.2.1			A collection of objects.
h3cAal5NotificationGroup	1.3.6.1.4.1.2011.10.2.21.1.3.2.2			Traps which may be used to enhance event driven management of the interface.

RFC description

AAL5 virtual circuit performance monitoring extending RFC 1695 for Huawei 3Com ATM equipment.

Start monitoring H3C router/switch with ATM interfaces (AAL5 VCC stats) 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 H3C-AAL5-MIB