2.11BSD/man/cat8/ntpdc.0
NTPDC(8) UNIX Programmer's Manual NTPDC(8)
NAME
ntpdc - monitor operation of ntp daemon
SYNOPSIS
ntpdc [-n] [-v] _h_o_s_t_s...
DESCRIPTION
_n_t_p_d_c 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 _n_t_p_d_c 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 _n_t_p_d_c.
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: _n_n
Reachability in response to last 8 polls (octal value
of shift register)
stratum: _n
Stratum level.
poll interval: _t_i_m_e
precision: _n_n
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: _n_n
Dispersion.
flags: _n_n
leap: _f_l_a_g
The leap second indicator. Non-zero if there is to be
a leap second added or subtracted at the new year.
Reference clock ID: [_a_d_d_r_e_s_s]
timestamp: _n_n
Poll interval: _t_i_m_e
threshold: _n_n
timer: _n_n
send: _n_n
The number of ntp packets sent to this neighbor.
received: _n_n
The number of ntp packets received from this neighbor.
samples: _n_n
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: _a_v_g-_d_e_l_a_y offset: _a_v_g-_o_f_f_s_e_t 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-???? _N_e_t_w_o_r_k _T_i_m_e _P_r_o_t_o_c_o_l(1), Dave Mills and ...
ntpd(8), ntp(8)
Printed 4/11/100 10 March 1989 4