Symmetricom SyncServer S100 User Manual page 37

th the e s s ta tate te st stor orag age e ca can n be be re reus used ed whe
higher hig
Symme Sym
(hi (high ghes est t st strat
ta tain ined ed wi with th two
so so th the e rat
me mess ssage
leap indicator (LI): leap indicator (LI):
The e Le Leap ap In Indi dic c at ator or (L (LI) I) is is a a two Th
following informat following
n n
n n
L L I I V V a a l l u u e e
0 0 0 0
01 01
10 10
1 1 1 1
When en th the e Sy Wh
the al alarm the
an an NTP
so sour urce ces. s. On
in indi dica cato tor r to to an an app
pag page e ca can n be be co confi nfigur
cat cator or cha
stratum: stratum:
Th This is is is an an ei eigh ght- t-bi bit t in inte tege ger r th that at in indi dica cate tes s th the e po posi siti tion on of of an an NTP
hi hier erar arch chy. y. It It is is ca calc lcul ulat ated ed by by ad addi ding ng 1 1 to to th the e s s tr trat atum
For For th the e Syn
0 0
1 1
2 2 - - 1 1 5 5
16 16-2 -255 55
For ex exam For
her str stratum atum lev level el and and thus thus ine
metri tric c ac acti tive ve mo mode de is is in inte tende
ratum um) ) of of the the sy sync nchro
two pe peer ers s at at th the e ne nex x t t lo lower
rate e of of on ongoi going ng pol polls ls is is us usua uall lly y no not t si sign gnif ific icant
ages s are are be bein ing g ret return urned ed fo for r ev every
information: ion:
Adv Advanc ance e warn warnin ing g th that at a a le leap ap se seco cond nd adj
en end d of of th the e cu curren rrent t da day. y. Lea Leap p se seco cond nds s are
(BIP (BIPM) M) in in ord order er to to sy sync nchro hroni nize ze the
Whe Wheth ther er th the e NTP NTP da daem emon on is is sy sync nchro
(o (on n pa page ge 33 33) ) pa page ge af affe fec c t t LI LI be beha havi vior or. .
- Prefs - Prefs
0 0 N N o w o wa a r r n n i i n n g g . .
1 1 Le Leap ap se seco cond nd in inse ser r tio tion: n: L L as ast t mi min n ut ute e o o f f th the e da day y h h as as 61 61 se seco cond nds. s.
2 2 Le Leap ap se seco cond nd de dele letio tion: n: L L as ast t mi min n ut ute e of of th the e da day y ha has s 59 59 se seco con n ds ds. .
3 3 Al Ala a r r m m co con n d d it itio ion n ( ( No
Sync ncSer Serve ver r or or NTP NTP da daem
arm co cond ndit itio ion. n. Thi This s al alarm
NTP s s er erve ver r (t (the he Sy Sync ncSer Serve ver) r) is is pr pres esen ent, t, bu but t th that at it it ha has s ye yet t to to v v al alid idat ate e it its s ti time
Once ce th the e Sy Sync ncSe Serv rver er fi find nds s a a va vali lid d so sour urce ce of of ti time
approp ropria riate te va valu lue. e. The
gured ed to to gen genera
changes nges sta state. te.
SyncSe cServ rver, er, th the e st strat ratum
S S t t r r a a t t u u m m
H H a a r r d d w w a a r r e C l e C lo o c c k k w w h h e e n n l l o o c c k k e e d d . .
P P r r i i m m a a r r y y s s e e r r v v e e r r
S S e e co con n d d a a r r y y se ser r v v e e r r
Unsynchr Unsyn chron onize ized, d, un unre reach
ampl ple, e, th the e Syn SyncSe cServe rver r is is: :
99 997-0 7-0152 1520-0 0-03 3 Rev Rev. . A A ..........................................................................
when n th the e pe peer er be beco come
inelig ligibl ible e as as a a sy synch nchroni ronizat
nded d fo for r us use e by by ti time me se serve
hroni niza zati tion on su subn bnet. et. Rel Relia iabl ble e ti time
wer st stra ratu tum m le lev v el el an and d on one e pe peer er at at th the e sa same
ant, , ev even en whe
ery pol poll. l.
two-b -bit it bi bina nary ry nu numb mber er in in th the e NTP
adjus ustm tmen ent t wil
are ev even ents ts ma
the UTC UTC ti time me sc scal ale e wit
hroni nize zed d to to a a ti timi ming ng ref
M M e e a a n n i i n n g g
Not t sy syn n ch chr r o o n n iz ize e d d ) )
emon on is is st star arte ted d or or re rest star arte ted, d, th the e le leap ap in indi dica cato tor r is is s s et et to to "1 "11" 1", ,
arm co condi nditi tion on ma make kes s it it po poss ssib ible le fo for r NTP
The NTP Leap Change Alarm NTP Leap Change Alarm on
erate te an an al alarm arm an and d se send nd no noti tifi fica cati tions
um of of th the e NTP
um va valu lues es are are de defi fine ned d as as fo foll llows
D D e e f f i i n n i i t t i i o o n n
achab able le. .
..........................................................................
mes s un unre reac acha habl ble e or or is is op oper erat atin ing g at at a a
zation ion sou source rce. .
rvers rs op opera erati ting ng ne near ar th the e en end d nod
me se servi rvice ce ca can n us usual ually ly be be ma
me st stra ratu tum m le lev v el el, ,
when n co conne nnect ctiv ivit ity y is is lo lost st and
NTP pa pack cket et he head ader er th that at pr prov ovid ides es th the e
will l be be ma made de to to the the UTC UTC ti time
manda ndate ted d by by the the worl world d ti time me aut
with h the the ear earth th's 's rot rotat atio ion. n.
refere erenc nce. e. The The se sett ttin ings gs on on th the e
NTP cl clie ient nts s to to rec recog ogni nize ze tha
me fr from
me an and d se sets ts it its s c c lo lock ck, , it it se sets ts th the e le leap ap
on th the e ADMIN - Alarms
ADMIN - Alarms
ons ea each ch ti time me the
NTP no node de wi with thin in an an NTP
NTP . .
system sys tem peer peer
ows: :
NTP NTP - - Sy Sysi sinf nfo o
nodes es
main in- -
and erro error r
mesc scal ale e at at the the
autho horit rity y
NTP NTP
that t
om it its s ti time me
the le leap ap in indi di- -
NTP ti timi ming ng
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