# 2.11BSD#431 - /usr/man/cat8/ntpdc.0

    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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