All MIBs › IEEE8021-AS-MIB › ieee8021AsDefaultDSOffsetScaledLogVariance
ieee8021AsDefaultDSOffsetScaledLogVariance
Module: IEEE8021-AS-MIB
OID (symbolic): IEEE8021-AS-MIB::ieee8021AsDefaultDSOffsetScaledLogVariance
OID (numeric): 1.3.111.2.802.1.1.20.1.1.5
Node type: OBJECT-TYPE
Type: Unsigned32
Access: read-only
Description: The offsetScaledLogVariance is scaled, offset representation of an estimate of the PTP variance. The PTP variance characterizes the precision and frequency stability of the ClockMaster. The PTP variance is the square of PTPDEV (see B.1.3.2). The value shall be selected as follows: a) offsetScaledLogVariance is set to the value that reflects the combination of the LocalClock and ClockSource entities; else b) if the value that reflects these entities is not specified or not known, offsetScaledLogVariance is set to 16640 (0x4100). This value corresponds to the value of PTPDEV for observation interval equal to the default Sync message transmission interval (i.e., observation interval of 0.125 s, see 11.5.2.3 and B.1.3.2).
A value of 65535 (0xFFFF) indicates value is too large to be represented or has not been computed.
What is ieee8021AsDefaultDSOffsetScaledLogVariance?
A scaled, offset representation of the local clock's estimated frequency stability (PTP variance); 65535 means the value is unknown or too large to represent. Mainly consumed internally by the best master clock algorithm rather than read directly during day-to-day troubleshooting.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.111.2.802.1.1.20.1.1.5 snmpwalk -v2c -c public <target> IEEE8021-AS-MIB::ieee8021AsDefaultDSOffsetScaledLogVariance
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.111.2.802.1.1.20.1.1.5.1 snmpget -v2c -c public <target> IEEE8021-AS-MIB::ieee8021AsDefaultDSOffsetScaledLogVariance.1
SNMPv3 example:
snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> ieee8021AsDefaultDSOffsetScaledLogVariance.1
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OID Breakdown
Upper-level ancestors (3 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.111.2.802.1.1 | ieee802dot1mibs | IEEE8021-TC-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.111.2.802.1.1.20 | ieee8021AsTimeSyncMib | IEEE8021-AS-MIB |
| 1.3.111.2.802.1.1.20.1 | ieee8021AsMIBObjects | IEEE8021-AS-MIB |
| 1.3.111.2.802.1.1.20.1.1 | ieee8021AsDefaultDS | IEEE8021-AS-MIB |
| 1.3.111.2.802.1.1.20.1.1.5 | ieee8021AsDefaultDSOffsetScaledLogVariance | IEEE8021-AS-MIB |