CISCO-ATM-NETWORK-CLOCK-MIB :: cncSourceChangeReason

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › CISCO-ATM-NETWORK-CLOCK-MIB › cncSourceChangeReason

cncSourceChangeReason

Module: CISCO-ATM-NETWORK-CLOCK-MIB

OID (symbolic): CISCO-ATM-NETWORK-CLOCK-MIB::cncSourceChangeReason

OID (numeric): 1.3.6.1.4.1.9.9.121.1.1.7

Node type: OBJECT-TYPE

Type: INTEGER

Access: read-only

Description: The reason for the most recent change of a source of network clock, as indicated by the change in the value of cncSourceChangeTimeStamp.

'none' indicates that the source of network clock has not changed.

'lossOfLock' indicates that the clock source was changed because the network clocking hardware lost lock on the previous network clock source.

'lossOfActivity' indicates that the clock source was changed because the network clocking hardware detected a loss of activity on the previous network clock source.

'ncdpRestructure' indicates that the NCDP entity has changed the clock source as a result of a network-wide network clock distribution tree restructuring process.

When the reason for a clock switchover is none of the above, the value of this object is 'other'.

What is cncSourceChangeReason?

Reports the reason the device's active network clock source most recently changed (for example, loss of lock), as reflected by a change in cncSourceChangeTimeStamp; a value of 'none' means no change has occurred.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.9.9.121.1.1.7
snmpwalk -v2c -c public <target> CISCO-ATM-NETWORK-CLOCK-MIB::cncSourceChangeReason

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.9.9.121.1.1.7.1
snmpget -v2c -c public <target> CISCO-ATM-NETWORK-CLOCK-MIB::cncSourceChangeReason.1

SNMPv3 example:

snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> cncSourceChangeReason.1

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OID Breakdown

Upper-level ancestors (8 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.9ciscoCAT2600-MIB
1.3.6.1.4.1.9.9ciscoMgmtCISCO-SMI
Numeric OIDNameModule
1.3.6.1.4.1.9.9.121ciscoAtmNetworkClockMIBCISCO-ATM-NETWORK-CLOCK-MIB
1.3.6.1.4.1.9.9.121.1ciscoAtmNetworkClockMIBObjectsCISCO-ATM-NETWORK-CLOCK-MIB
1.3.6.1.4.1.9.9.121.1.1cncGlobalCISCO-ATM-NETWORK-CLOCK-MIB
1.3.6.1.4.1.9.9.121.1.1.7cncSourceChangeReasonCISCO-ATM-NETWORK-CLOCK-MIB