A3COM-HUAWEI-T1-MIB

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Organization: Hangzhou H3C Technologies Co., Ltd.

Last Updated: 2009-06-08

Category: Network Interfaces, Vendor: H3C/HH3C

Description: Manages T1 (DS1) interface configuration and performance monitoring on H3C/3Com routers, including framing, line coding, and circuit status objects.

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What Is A3COM-HUAWEI-T1-MIB?

A3COM-HUAWEI-T1-MIB is an H3C/3Com private MIB supplying T1 (DS1) interface objects not covered by the standard RFC 1213 and RFC 2233 interface MIBs, targeting T1 WAN circuit configuration and error monitoring on routers. It exposes a per-interface status table with detailed line-error counters covering CRC errors, alignment errors, framing errors, overruns, runts, giants, dribble errors, aborted sequences, and buffer exhaustion. This is a classic hardware/circuit-health monitoring MIB: rising error counters on a T1 span directly indicate physical-layer problems such as a degraded copper/fiber circuit, clocking mismatch, or carrier-side line fault before the circuit fully fails. It explicitly supplements RFC 1213 (MIB-II) and RFC 2233 (IF-MIB) rather than duplicating them, so it is meant to be read together with standard interface tables. It is deployed on H3C/3Com routers with T1/DS1 WAN interface cards used for leased-line or PRI connectivity. Engineers can download the A3COM-HUAWEI-T1-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM-HUAWEI-T1-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/3Com routers with T1/DS1 WAN interfaces

Monitoring Examples

An operator polls t1InterfaceStatusTable/t1InterfaceStatusEntry and watches t1InterfaceInCrcErrs and t1InterfaceInFramingErrs climb over time, which points to a T1 line-coding or clock-source mismatch with the carrier. A spike in t1InterfaceInOverRunsErrs or t1InterfaceInNoBufferErrs suggests the router is dropping incoming T1 frames due to local buffer exhaustion rather than a line problem. Rising t1InterfaceInAlignErrs alongside t1InterfaceInAbortedSeqErrs would further narrow the fault to framing/synchronization issues on that circuit.

What Can Be Monitored

T1 interface status
CRC error count
framing error count
alignment error count
overrun/buffer errors
runts/giants/dribble errors

Imported Objects

From A3COM-HUAWEI-OID-MIB

h3cCommon

OBJECT-IDENTITY

From RFC1213-MIB

ifIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using t1InterfaceInErrs OID:

Select an H3C/3Com T1/DS1 router 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 t1InterfaceInErrs 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 total number of error received on this interface. 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 between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
h3cT1	1.3.6.1.4.1.43.45.1.10.2.29			This MIB provides T1 interface information that are excluded by RFC 1213 and RFC 2233
t1InterfaceStatusTable	1.3.6.1.4.1.43.45.1.10.2.29.1		not-accessible	This table contains interface packet statistics
t1InterfaceStatusEntry	1.3.6.1.4.1.43.45.1.10.2.29.1.1		not-accessible	This entry contains interface packet statistics. The index of this Entry is ifIndex defined in ifTable of RFC1213-MIB
C32 t1InterfaceInErrsEx	1.3.6.1.4.1.43.45.1.10.2.29.1.1.1	Counter32	read-only	The total number of error received on this interface
C32 t1InterfaceInRuntsErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.2	Counter32	read-only	The number of Runts Error(too short packet) received on this interface
C32 t1InterfaceInGiantsErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.3	Counter32	read-only	The number of Giants Error(too long packet) received on this interface
C32 t1InterfaceInCrcErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.4	Counter32	read-only	The number of CRC Error received on this interface
C32 t1InterfaceInAlignErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.5	Counter32	read-only	The number of Align Error received on this interface
C32 t1InterfaceInOverRunsErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.6	Counter32	read-only	The number of Over Runs Error received on this interface
C32 t1InterfaceInDribblesErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.7	Counter32	read-only	The number of dribble packets received
C32 t1InterfaceInAbortedSeqErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.8	Counter32	read-only	The number of AbortedSeq Error received on this interface
C32 t1InterfaceInNoBufferErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.9	Counter32	read-only	The number of Error (no buffer available)
C32 t1InterfaceInFramingErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.10	Counter32	read-only	The number of framing Errors
C32 t1InterfaceOutputErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.11	Counter32	read-only	The number of total Error transmited on this interface
C32 t1InterfaceOutUnderRunErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.12	Counter32	read-only	The number of UnderRun Error transmited on this interface
C32 t1InterfaceOutCollisonsErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.13	Counter32	read-only	The number of Collisions Error transmited on this interface
C32 t1InterfaceOutDeferedErrs	1.3.6.1.4.1.43.45.1.10.2.29.1.1.14	Counter32	read-only	The number of Deferred Error transmited on this interface
h3ct1Table	1.3.6.1.4.1.43.45.1.10.2.29.2		not-accessible	A list of T1 interface entries.
h3ct1Entry	1.3.6.1.4.1.43.45.1.10.2.29.2.1		not-accessible	This entry contains T1 interface management information.
BIT h3ct1Type	1.3.6.1.4.1.43.45.1.10.2.29.2.1.1	Bits	read-only	Specifies the type of the T1 interface.
INT h3ct1Clock	1.3.6.1.4.1.43.45.1.10.2.29.2.1.2	INTEGER	read-write	Specifies the clock type used on the T1 interface.
INT h3ct1FrameFormat	1.3.6.1.4.1.43.45.1.10.2.29.2.1.3	INTEGER	read-write	Specifies the frame format used on the T1 interface.
INT h3ct1LineCode	1.3.6.1.4.1.43.45.1.10.2.29.2.1.4	INTEGER	read-write	Specifies the line code type used on the T1 interface.
H3C h3ct1PriSetTimeSlot	1.3.6.1.4.1.43.45.1.10.2.29.2.1.5	H3cT1TimeSlot	read-write	This is a bit-map of PRI time slots used on the T1 interface. It needs to administratively shut down the D channel of the T1 interface before cancelling PRI time slots.
I32 h3ct1DChannelIndex	1.3.6.1.4.1.43.45.1.10.2.29.2.1.6	Integer32	read-only	This is the ifIndex of the D channel of the T1 interface.
I32 h3ct1SubScribLineChannelIndex	1.3.6.1.4.1.43.45.1.10.2.29.2.1.7	Integer32	read-only	This is the ifIndex of the subscriber-line channel of the T1 interface.
h3ct1InterfaceTable	1.3.6.1.4.1.43.45.1.10.2.29.3		not-accessible	A list of channels of T1 interface entries. Including D channels and subscriber-line channels.
h3ct1InterfaceEntry	1.3.6.1.4.1.43.45.1.10.2.29.3.1		not-accessible	This entry contains channels of T1 interface management information. Including D channels and subscriber-line channels.
I32 h3ct1ControllerIndex	1.3.6.1.4.1.43.45.1.10.2.29.3.1.1	Integer32	read-only	Which T1 interface is this channel belonged to.

RFC description

Manages T1 interface statistics and configuration on H3C/3Com/Huawei network equipment.

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Download A3COM-HUAWEI-T1-MIB