SL-SONET-ALARM-MIB

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Organization: Smartoptics AS

Last Updated: 2000-08-28

Description: MIB for SONET alarm management on SmartOptics SiteLight equipment, defining alarm types including LOS, LOF, LOP, AIS, RFI, UNEQ, TIM, SLM, and hardware failure

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What Is SL-SONET-ALARM-MIB?

SL-SONET-ALARM-MIB is a Smartoptics SiteLight MIB defining SONET-layer alarm management for the platform, covering the standard set of SONET failure conditions: Loss of Signal (LOS), Loss of Frame (LOF), Loss of Pointer (LOP), Alarm Indication Signal (AIS), Remote Failure Indication (RFI), Unequipped (UNEQ), Trace Identifier Mismatch (TIM), Signal Label Mismatch (SLM), and hardware failure. It exposes a per-interface alarm configuration table with alarm type, mask, current status, severity, and a service-affecting flag, plus a set of alarm traps. This is squarely a fault/alarm-monitoring MIB for the transport hardware and signal path: an operator uses alarm status and severity to see exactly which SONET-layer fault is present on a given interface and whether it is service-affecting, which is central to root-causing an optical transport outage. It implements the well-established SONET/SDH alarm taxonomy defined by Telcordia/ITU-T standards, and complements the platform's optical (SL-OPT-MIB) and Ethernet/FC service MIBs by supplying the underlying transport-layer fault detail. It is deployed on Smartoptics SiteLight SONET/optical transport network elements wherever line-level fault visibility is required. Engineers can download the SL-SONET-ALARM-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in SL-SONET-ALARM-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

Smartoptics SiteLight SONET/optical transport equipment

Monitoring Examples

An administrator would poll slSonetAlarmConfigTable/slSonetAlarmConfigEntry (indexed by slSonetAlarmIfIndex) to check slSonetAlarmStatus and slSonetAlarmType, identifying, for example, an active LOS or AIS condition on a specific interface. slSonetAlarmSeverity and slSonetAlarmServiceAffect together tell the operator whether the fault is merely informational or is actively degrading customer service, guiding whether to escalate immediately. slSonetAlarmMask lets an operator suppress alarms not relevant to a given deployment, and slSonetAlarmTraps notify the NMS in real time when a new SONET alarm is raised or cleared.

What Can Be Monitored

SONET alarm type (LOS/LOF/LOP/AIS/RFI/UNEQ/TIM/SLM)
alarm current status and severity
service-affecting flag
alarm mask configuration

Imported Objects

From IF-MIB

InterfaceIndex

From PerfHist-TC-MIB

PerfCurrentCount
PerfIntervalCount
PerfTotalCount

From SL-SONET-MIB

slSonetMib

MODULE-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

DisplayString
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using slSonetAlarmSeverity OID:

Select a Smartoptics SiteLight SONET/optical transport equipment (SONET-layer alarm 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 slSonetAlarmSeverity into the Find box to locate it in the OID tree, then select it and click OK. The alarm severity. 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 an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the value is anything other than 'noAlarm', since that indicates the condition this object reports has changed to one worth investigating. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
slSonetAlarmMib	1.3.6.1.4.1.4515.1.6.4			This MIB module describes the SONET ALARMS.
slSonetAlarmConfig	1.3.6.1.4.1.4515.1.6.4.1
slSonetAlarmConfigTable	1.3.6.1.4.1.4515.1.6.4.1.1		not-accessible	This table contains objects to configure the SONET Alarms.
slSonetAlarmConfigEntry	1.3.6.1.4.1.4515.1.6.4.1.1.1		not-accessible	An entry exist for each type of alarm. The entry describes the alarm properties.
NUM slSonetAlarmIfIndex	1.3.6.1.4.1.4515.1.6.4.1.1.1.1	InterfaceIndex	read-only	The corresponding SONET interface index. The interface type may be of sonet(39), sonetPath(50) or sonetVT(51).
SON slSonetAlarmType	1.3.6.1.4.1.4515.1.6.4.1.1.1.2	SonetAlarmType	read-only	The alarm type.
T/F slSonetAlarmMask	1.3.6.1.4.1.4515.1.6.4.1.1.1.3	TruthValue	read-write	The alarm mask. If True - enable alarm, otherwise - disable alarm.
T/F slSonetAlarmStatus	1.3.6.1.4.1.4515.1.6.4.1.1.1.4	TruthValue	read-only	The Alarm status. If True the alarm state is ON. Otherwise the alarm state is OFF. The states shown here are the stabilized state.
slSonetAlarmTraps	1.3.6.1.4.1.4515.1.6.4.2
INT slSonetAlarmSeverityEx	1.3.6.1.4.1.4515.1.6.4.2.1	INTEGER	read-only	The alarm severity.
T/F slSonetAlarmServiceAffect	1.3.6.1.4.1.4515.1.6.4.2.2	TruthValue	read-only	The alarm service affecting Yes/No.
NTF slSonetAlarmTrap	1.3.6.1.4.1.4515.1.6.4.2.3			An slSonetAlarmTrap notification is sent when an alarm occures.

RFC description

Smartoptics SONET alarm configuration and monitoring for synchronous network interfaces.

Start monitoring Smartoptics SiteLight SONET/optical transport equipment (SONET-layer alarm 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 SL-SONET-ALARM-MIB