All MIBs › Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB › mscLpEDS1RxAisAlarm
mscLpEDS1RxAisAlarm
Module: Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB
OID (symbolic): Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB::mscLpEDS1RxAisAlarm
OID (numeric): 1.3.6.1.4.1.562.36.2.1.12.28.16.1.3
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-only
Description: This attribute indicates whether an AIS (Alarm Indication Signal) alarm has been entered. The AIS Alarm state is entered when AIS defects have been observed and accumulated for 2.5 seconds +/- 0.5 second. An AIS defect is detected after having received less than 3 zeros in a 2048 bit period. If the AIS defects are intermittently occurring, the AIS defect accumulator is decremented at a rate of 1/ 10 of the incrementing rate (alarm integration ratio of 1/10), with all measurement based on a 200 ms polling cycle. The port goes into an operational state of disabled for the duration of an AIS alarm state. The AIS alarm state is cleared when AIS defects are absent for 10 seconds +/- 0.5 second.
What is mscLpEDS1RxAisAlarm?
This object reports whether an Alarm Indication Signal (AIS) alarm is currently active on the EDS1 timing line, declared when the received signal shows fewer than 3 zeros in a 2048-bit period for about 2.5 seconds, indicating the upstream source is sending an all-ones keep-alive pattern rather than real data. Admins recognize this as a signal that an upstream device is itself reporting a failure further up the chain. For example, mscLpEDS1RxAisAlarm reporting on(0) suggests the equipment feeding this timing line detected its own upstream fault and is relaying an AIS indication downstream.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.562.36.2.1.12.28.16.1.3 snmpwalk -v2c -c public <target> Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB::mscLpEDS1RxAisAlarm
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.562.36.2.1.12.28.16.1.3.1 snmpget -v2c -c public <target> Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB::mscLpEDS1RxAisAlarm.1
SNMPv3 example:
snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> mscLpEDS1RxAisAlarm.1
Start monitoring Nortel MsCarrier MscPassport (Passport) carrier switch, CPeD Control Processor (external DS1 timing) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB::mscLpEDS1RxAisAlarm OID value, configure state conditions and alerts, and monitor any Nortel MsCarrier MscPassport (Passport) carrier switch, CPeD Control Processor (external DS1 timing) from a single console.
OID Breakdown
Upper-level ancestors (11 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.562 | nortel | CPM-NORTEL-MIB |
| 1.3.6.1.4.1.562.36 | msCarrier | Nortel-MsCarrier-MscPassport-UsefulDefinitionsMIB |
| 1.3.6.1.4.1.562.36.2 | mscPassport | Nortel-MsCarrier-MscPassport-UsefulDefinitionsMIB |
| 1.3.6.1.4.1.562.36.2.1 | mscComponents | Nortel-MsCarrier-MscPassport-UsefulDefinitionsMIB |
| 1.3.6.1.4.1.562.36.2.1.12 | mscLp | Nortel-MsCarrier-MscPassport-LogicalProcessorMIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.562.36.2.1.12.28 | mscLpEDS1 | Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB |
| 1.3.6.1.4.1.562.36.2.1.12.28.16 | mscLpEDS1OperTable | Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB |
| 1.3.6.1.4.1.562.36.2.1.12.28.16.1 | mscLpEDS1OperEntry | Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB |
| 1.3.6.1.4.1.562.36.2.1.12.28.16.1.3 | mscLpEDS1RxAisAlarm | Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB |