ieee8021AsDefaultDSOffsetScaledLogVariance
IEEE8021-AS-MIB ·
.1.3.111.2.802.1.1.20.1.1.5
Object
scalar
Unsigned32
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.
Context
- MIB
- IEEE8021-AS-MIB
- OID
.1.3.111.2.802.1.1.20.1.1.5- Type
- scalar
- Access
- readonly
- Status
- current
- Parent
- ieee8021AsDefaultDS
- Siblings
- 14
Syntax
Unsigned32
Values & Constraints
Object Constraints
range: 0-65535
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| ieee8021AsDefaultDSClockIdentity Globally unique manufacturer-assigned clock identifier
for the local clock. The identifier is based on an
EUI-64. | scalar | ClockIdentity | .1.3.111.2.802.1.1.20.1.1.1 |
| ieee8021AsDefaultDSCurrentUTCOffsetValid True (1) if ieee8021AsDefaultDSCurrentUTCOffset is known
to be correct; false (2) otherwise. | scalar | SNMPv2-TCTruthValue | .1.3.111.2.802.1.1.20.1.1.10 |
| ieee8021AsDefaultDSLeap59 A true (1) value indicates that the last minute of the
current UTC day, relative to the ClockMaster entity of
this time-aware system, will contain 59 seconds. It is
equal to … | scalar | SNMPv2-TCTruthValue | .1.3.111.2.802.1.1.20.1.1.11 |
| ieee8021AsDefaultDSLeap61 A true (1) value indicates that the last minute of the
current UTC day, relative to the ClockMaster entity of
this time-aware system, will contain 59 seconds. It is
equal to … | scalar | SNMPv2-TCTruthValue | .1.3.111.2.802.1.1.20.1.1.12 |
| ieee8021AsDefaultDSTimeTraceable The value is set to true (1) if the timescale and the
value of Ieee8021AsCurrentUtcOffset, relative to the
ClockMaster entity of this time-aware system, are
traceable to a prima… | scalar | SNMPv2-TCTruthValue | .1.3.111.2.802.1.1.20.1.1.13 |
| ieee8021AsDefaultDSFrequencyTraceable The value is set to true (1) if the frequency determining
the timescale of the ClockMaster Entity of this time-
aware system is traceable to a primary reference
standard; otherw… | scalar | SNMPv2-TCTruthValue | .1.3.111.2.802.1.1.20.1.1.14 |
| ieee8021AsDefaultDSTimeSource 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 val… | scalar | IEEE8021ASTimeSourceValue | .1.3.111.2.802.1.1.20.1.1.15 |
| ieee8021AsDefaultDSNumberPorts The number of PTP ports on the device.
For an end station the value is 1. | scalar | Unsigned32 | .1.3.111.2.802.1.1.20.1.1.2 |
| ieee8021AsDefaultDSClockClass Denotes the traceability of the time or frequency of the
local clock. The value shall be selected as follows:
a) If the Default Parameter Data Set member gmCapable is
TRUE,… | scalar | IEEE8021ASClockClassValue | .1.3.111.2.802.1.1.20.1.1.3 |
| ieee8021AsDefaultDSClockAccuracy Characterizes local clock for the purpose of the best
master clock algorithm. The value shall be selected as
follows:
a) clockAccuracy is set to the value that reflects the
… | scalar | IEEE8021ASClockAccuracyValue | .1.3.111.2.802.1.1.20.1.1.4 |
| ieee8021AsDefaultDSPriority1 Most-significant priority declaration in the execution of
the best master clock algorithm. Lower values take
precedence. The value of priority1 shall be 255 for a
time-aware syst… | scalar | Unsigned32 | .1.3.111.2.802.1.1.20.1.1.6 |
| ieee8021AsDefaultDSPriority2 Least-significant priority declaration in the execution
of the best master clock algorithm. Lower values take
precedence. The default value is 248 | scalar | Unsigned32 | .1.3.111.2.802.1.1.20.1.1.7 |
| ieee8021AsDefaultDSGmCapable True (1) if master clock capable; false (2)
otherwise. | scalar | SNMPv2-TCTruthValue | .1.3.111.2.802.1.1.20.1.1.8 |
| ieee8021AsDefaultDSCurrentUTCOffset The value is the offset between TAI and UTC, relative to
the ClockMaster entity of this time-aware system. It is
equal to the global variable sysCurrentUtcOffset (see
10.3.8.16… | scalar | seconds Integer32 | .1.3.111.2.802.1.1.20.1.1.9 |