IEEE8021-AS-MIB :: ieee8021AsDefaultDSTimeSource

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › IEEE8021-AS-MIB › ieee8021AsDefaultDSTimeSource

ieee8021AsDefaultDSTimeSource

Module: IEEE8021-AS-MIB

OID (symbolic): IEEE8021-AS-MIB::ieee8021AsDefaultDSTimeSource

OID (numeric): 1.3.111.2.802.1.1.20.1.1.15

Node type: OBJECT-TYPE

Type: IEEE8021ASTimeSourceValue

Access: read-only

Description: The timeSource is an information-only attribute indicating the type of source of time used by a ClockMaster. The value is not used in the selection of the grandmaster. The values shall be as specified in Table 8-3. These represent categories. For example, the GPS entry would include not only the GPS system of the U.S. Department of Defense but the European Galileo system and other present and future satellite-based timing systems. All unused values in Table 8-3 are reserved.

The initialization value is selected as follows: a) If the timeSource (8.6.2.7 and Table 8-3), is known at the time of initialization, the value is derived from the table, else b) The value is set to INTERNAL_OSCILLATOR (160).

What is ieee8021AsDefaultDSTimeSource?

Identifies the category of time source feeding this clock, e.g. GPS, NTP, atomic clock, or internal oscillator (the default). Informational only; useful for confirming a device is actually locked to an external reference rather than free-running on its own oscillator.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.111.2.802.1.1.20.1.1.15
snmpwalk -v2c -c public <target> IEEE8021-AS-MIB::ieee8021AsDefaultDSTimeSource

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.111.2.802.1.1.20.1.1.15.1
snmpget -v2c -c public <target> IEEE8021-AS-MIB::ieee8021AsDefaultDSTimeSource.1

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OID Breakdown

Upper-level ancestors (3 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.111.2.802.1.1ieee802dot1mibsIEEE8021-TC-MIB
Numeric OIDNameModule
1.3.111.2.802.1.1.20ieee8021AsTimeSyncMibIEEE8021-AS-MIB
1.3.111.2.802.1.1.20.1ieee8021AsMIBObjectsIEEE8021-AS-MIB
1.3.111.2.802.1.1.20.1.1ieee8021AsDefaultDSIEEE8021-AS-MIB
1.3.111.2.802.1.1.20.1.1.15ieee8021AsDefaultDSTimeSourceIEEE8021-AS-MIB