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Understanding Timing Defects and Event Management on ACX Series

Junos OS for ACX Universal Metro Routers supports defect and event management capabilities for timing features. Defects and events are notified in the form of SNMP traps and these SNMP traps are logged into the system log-file (var/log/snmpd). For each of the SNMP traps (timing defects and timing events) that are generated, a message is logged in the clksyncd file (var/log/clksyncd).

Table 1 shows the list of SNMP trap notifications for timing defects and events supported in ACX Universal Metro Routers.

Table 1: SNMP trap notifications for timing defects and events

SNMP Trap

Notification Type

Description

jnxTimingFaultLOS

Defects

Denotes loss of signal

jnxTimingFaultEFD

Defects

Denotes exceeded frequency deviation

jnxTimingFaultLOESMC

Defects

Denotes loss of Ethernet Synchronization Message Channel (ESMC)

jnxTimingFaultQLFailed

Defects

Denotes failure in quality level

jnxTimingFaultLTI

Defects

Denotes loss of timing information

jnxTimingFaultPriSrcFailed

Defects

Denotes the failure of primary source

jnxTimingFaultSecSrcFailed

Defects

Denotes the failure of secondary source

jnxTimingFaultPtpUniNegRateReject

Defects

When acting as primary, this SNMP trap denotes failure or rejects clients for signaling messages. When acting as a client, this SNMP trap denotes failure or client stops receiving signaling messages

jnxTimingEventPriSrcRecovered

Events

Denotes the recovery of primary source

jnxTimingEventSecSrcRecovered

Events

Denotes the recovery of secondary source

jnxTimingEventPriRefChanged

Events

Denotes a change in primary reference such as a change in logical interface or a change from SyncE to BITS/external interface)

jnxTimingEventSecRefChanged

Events

Denotes a change in secondary reference such as a change in logical interface

jnxTimingEventQLChanged

Events

Denotes a change in quality level

jnxTimingEventDpllStatus

Events

Denotes the DPLL status (SyncE, BITS, Hybrid)

jnxTimingEventPtpServoStatus

Events

Denotes the following PTP Servo states:

  • INITIALIZING

  • ACQUIRING (Primary is elected and servo starts acquiring lock)

  • PHASE ALIGNED (Locked to Primary)

  • FREERUN (no PTP source available)

  • HOLDOVER (Member locked to PTP for more than 12 hours and then loses all the PTP sources)

jnxTimingEventPtpClockClassChange

Events

Denotes a change in PTP clock class

jnxTimingEventPtpClockAccuracyChange

Events

Denotes a change in PTP accuracy

jnxTimingEventPtpGMChange

Events

Denotes a change in PTP reference clock

jnxTimingEventHybridStatus

Events

Denotes the following hybrid states:

  • INITIALIZING

  • ACQUIRING (Primary is elected and servo starts acquiring lock)

  • FREQUENCY LOCKED (Frequency locked but acquiring phase)

  • PHASE ALIGNED (Frequency and phase locked)

To configure and generate timing defects and events trap notifications, include the timing-events statement at the [edit snmp trap-group trap-group-name categories] hierarchy level as shown below:

The following is a sample configuration for SNMP timing in ACX Series routers: