NTPDC(8)						      System Manager'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 internet addresses.

       Default is a terse, table-style report.	The -t switch generates 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 cur-
	      rently being used for synchronization.

       (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 synchronization 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 milliseconds 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.

       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 pre-
	      cision 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 ???
	      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)

								   10 March 1989							  NTPDC(8)