Timing Defects and Event Management on Routing Platforms

date_range 20-Dec-24

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Junos OS supports defect and event management capabilities for timing features. Defects and events are notified in the form of SNMP traps. These SNMP traps are logged into the system log-file (var/log/snmpd).

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).

Starting Junos Evolved release version 24.2R1, ACX7332 and ACX7348 devices support additional defect management capability for the SYNCE, PTP MIB (SNMP traps) and display error messages for timing features. For details, see SNMP MIB for Timing on Routing Platforms.

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 (Set, Clear)	Set denotes loss of signal Clear denotes loss of signal is cleared
jnxTimingFaultEFD	Defects (Set, Clear)	Denotes exceeded frequency deviation
jnxTimingFaultLOESMC	Defects (Set, Clear)	Denotes loss of Ethernet Synchronization Message Channel (ESMC)
jnxTimingFaultQLFail	Defects (Set, Clear)	Denotes failure in quality level
jnxTimingFaultLTI	Defects (Set, Clear)	Denotes loss of timing information
jnxTimingFaultPriSrcFailed	Defects	Denotes the failure of timeTransmitter source
jnxTimingFaultSecSrcFailed	Defects	Denotes the failure of secondary source
jnxTimingFaultPtpUniNegRateReject	Defects	When acting as timeTransmitter, this SNMP trap denotes failure or rejects timeReceivers for signaling messages. When acting as a timeReceiver, this SNMP trap denotes failure or timeReceiver stops receiving signaling messages
jnxTimingEventPriSrcRecovered	Events	Denotes the recovery of timeTransmitter source
jnxTimingEventSecSrcRecovered	Events	Denotes the recovery of secondary source
jnxTimingEventPriRefChanged	Events	Denotes a change in timeTransmitter 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
jnxTimingEventQLChangedRx (ACX7332, ACX7348)	Events	Denotes a change in quality level at Receiver SSM/ESMC
jnxTimingEventQLChangedTx (ACX7332, ACX7348)	Events	Denotes a change in quality level at Transmitter SSM/ESMC
jnxTimingEventDpllStatus	Events	Denotes the DPLL status (SyncE, BITS, Hybrid)
jnxTimingEventSynceDpllStatus (ACX7332, ACX7348)	Events	Denotes the following SyncE DPLL states: jnxClksyncIfIndex: Frequency is derived from this interface index. jnxClksyncIntfName: Frequency is derived from this interface name. jnxClksyncDpllState: DPLL status. jnxClksyncDpllStateStr: DPLL status in string format.
jnxTimingEventPtpServoStatus	Events	Denotes the following PTP Servo states: INITIALIZING ACQUIRING (TimeTransmitter is elected and servo starts acquiring lock) PHASE ALIGNED (Locked to TimeTransmitter) 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 grandmaster clock
jnxTimingEventHybridStatus	Events	Denotes the following hybrid states: INITIALIZING ACQUIRING (TimeTransmitter 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:

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[edit]
snmp {
    trap-group <group-name> {
       categories {
          timing-events;
        }
    }
} 

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

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snmp {
    trap-options {
        source-address 10.216.66.139;
    }
    trap-group timingGroup {
        version v2;
        destination-port 8999;
        categories {
            timing-events;
        }                               
        targets {
            192.168.120.129;
        }
    }
    traceoptions {
        flag all;
    }
}

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Timing and Synchronization Guide

Timing Defects and Event Management on Routing Platforms

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