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NTPDC(8) UNIX Programmer's Manual NTPDC(8) NAME ntpdc - monitor operation of ntp daemon SYNOPSIS ntpdc [-n] [-v] hosts... DESCRIPTION ntpdc sends an INFO_QUERY packet to an ntp daemon running on the given hosts. Each daemon responds with information about each of its peers, which ntpdc formats on the standard output. Normally, the name of the responding host and its peers are printed. The -n switch disables this, printing only inter- net addresses. Default is a terse, table-style report. The -t switch gen- erates an alternate form of the terse report. The -v switch generates a verbose report. TERSE REPORT A typical terse report looks like: (rem) Address (lcl) Strat Poll Reach Delay Offset Disp ========================================================================== -umd1 128.8.10.14 1 64 266 3.0 -65.0 0.0 *DCN1.ARPA 128.8.10.14 1 256 332 155.0 -4.0 0.0 128.8.251.92 128.8.10.14 2 64 367 -16.0 -61.0 0.0 idunno.Princeto 128.8.10.14 3 64 252 60.0 -53.0 0.0 leo 128.8.10.14 2 64 275 4.0 -273.0 1536.2 The alternate form is only slightly different; it looks like: Address Reference Strat Poll Reach Delay Offset Disp ========================================================================== -umd1 WWVB 1 64 266 3.0 -65.0 0.0 *DCN1.ARPA WWVB 1 256 332 155.0 -4.0 0.0 128.8.251.92 umd1 2 64 367 -16.0 -61.0 0.0 idunno.Prince trantor 3 64 252 60.0 -53.0 0.0 leo umd1 2 64 275 4.0 -273.0 1536.2 Fields are interpreted as follows: - or *: The - mark indicates a pre-configured peer (mentioned in ntp.conf). the * mark shows which pre-configured peer (if any) is currently being used for synchroniza- tion. Printed 4/11/100 10 March 1989 1 NTPDC(8) UNIX Programmer's Manual NTPDC(8) (rem) address: The remote host name or internet address of a peer. (lcl) address: The "local" host as specified as an argument to ntpdc. Reference: The reference time source being used for synchroniza- tion by the peer. Strat: The stratum level of the peer (as perceived by the local host). Poll: Current polling interval in seconds for this peer. Reach: Octal value of a shift register indicating which responses were received from the previous 8 polls to this peer (see RFC-????). Delay: Round-trip delay in milliseconds for this peer as of the latest poll. Disp: Current value of dispersion (see RFC-????) in mil- liseconds for this peer. VERBOSE REPORTS When the -v flag is given a series of verbose reports are presented. A typical one looks like this: Neighbor address 128.4.0.6 port:123 local address 192.35.201.47 Reach: 0376 stratum: 1 poll int(HPI): 10 precision: -10 Sync distance: 0 disp: 0.014000 flags: 0 leap: 0 Reference clock ID: WWV timestamp: a7c2832e.6f9d0000 Poll int(MPI): 10 threshold: 1024 timer: 1024 send: 266 received: 192 samples: 9 Delay(ms) 1144.00 1296.00 1118.00 1115.00 1225.00 1129.00 1086.00 1087.00 Offset(ms) 19.00 92.00 -17.00 12.00 41.00 4.00 -1.00 -14.00 delay: 1086.000000 offset: -1.000000 dsp 0.014000 Fields are interpreted as follows: Neighbor address...: The address and port number of this neighbor, followed by the local address. Printed 4/11/100 10 March 1989 2 NTPDC(8) UNIX Programmer's Manual NTPDC(8) Reach: nn Reachability in response to last 8 polls (octal value of shift register) stratum: n Stratum level. poll interval: time precision: nn The precision of this clock, given in seconds as a power of 2. e.g A clock derived from the power line frequency (60 Hz) has a precision of 1/60 second (about 2^-6) and would be indicated by a precision of -6. Syn distance: 0 Synchronizing distance. Always zero in the current implementation. disp: nn Dispersion. flags: nn leap: flag The leap second indicator. Non-zero if there is to be a leap second added or subtracted at the new year. Reference clock ID: [address] timestamp: nn Poll interval: time threshold: nn timer: nn send: nn The number of ntp packets sent to this neighbor. received: nn The number of ntp packets received from this neighbor. samples: nn Delay and Offset The round-trip delay and clock offset for the last eight ntp packet exchanges. If there are fewer than eight valid samples, the delay field will be zero. delay: avg-delay offset: avg-offset dsp ??? Printed 4/11/100 10 March 1989 3 NTPDC(8) UNIX Programmer's Manual NTPDC(8) Average delay, offset, and dispersion calculated from the above samples. Meanings...??? BUGS Probably a few. Report bugs to Louis A. Mamakos (louie@trantor.umd.edu). SEE ALSO RFC-???? Network Time Protocol(1), Dave Mills and ... ntpd(8), ntp(8) Printed 4/11/100 10 March 1989 4
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