Symmetricom Time Server, User Manual

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6000-100AppD.fm Rev. D TimeVault™ User’s Manual
D-117
Symmetricom SNMP Enterprise MIB Appendix D: SNMP – Simple Network Management Protocol
ntpSysRootDelay OBJECT-TYPE
SYNTAX Counter
MAX-ACCESS read-only
STATUS current
DESCRIPTION
“This is a raw 32 bit number representing a signed fixed point 32-bit
number indicating the total round-trip delay to the primary
synchronization clock source in seconds with the fraction point
between bits 15 and 16. Note that this variable can take on both
positive and negative values, depending on clock precision and skew.
Note: a primary time server’s outgoing NTP packet will have its root
delay field set to ntpSysRootDelay.”
::= { ntp 12 }
ntpSysRootDisp OBJECT-TYPE
SYNTAX Counter
MAX-ACCESS read-only
STATUS current
DESCRIPTION
“This is a raw 32 bit number representing a signed 32-bit fixed-point
number indicating the maximum error relative to the primary reference
source, in seconds with fraction point between bits 15 and 16. Only
positive values greater than zero are possible. Note: a primary time
server’s outgoing NTP packet will have its root dispersion field set
to ntpSysRootDisp.”
::= { ntp 13 }
ntpSysRefClockIdent OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..4))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
“This is a four byte ASCII string identifying the particular reference
clock. In the case of stratum 0 (unspecified) or stratum 1 (primary
reference), this is a four-octet, left-justified, zero-padded ASCII
string. While not enumerated as part of the NTP specification, the
following are suggested ASCII identifiers:
Stratum Code Meaning
------- ---- -------
0 DCN DCN routing protocol
0 NIST NIST public modem
0 TSP TSP time protocol
0 DTS Digital Time Service
1 ATOM Atomic clock (calibrated)
1 VLF VLF radio (OMEGA, etc.)
1 callsign Generic radio
1 LORC LORAN-C radionavigation
1 GOES GOES UHF environment satellite
1 GPS GPS UHF satellite positioning
1 ACTS ACTS telephone modem dial-up
1 IRIG Inter-Range Instrumentation Group signal