NTP clock synchronize


we are having Cisco CISCO2921/K9 VG router in office. Its unable synchronize with NTP. Below are the out puts ..Any help will be much appreciated.

INBUPPVG501#sh ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 250.0000 Hz, actual freq is 249.9984 Hz, precision is 2**24
reference time is 00000000.00000000 (05:30:00.000 IST Mon Jan 1 1900)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 21.24 msec, peer dispersion is 0.00 msec
loopfilter state is 'FSET' (Drift set from file), drift is 0.000006402 s/s
system poll interval is 64, never updated.

INBUPPVG501#sh run | sec ntp
ntp authentication-key 10 md5 097A1F5C292928300A02032624362D 7
ntp authenticate
ntp trusted-key 10
ntp access-group peer 10
ntp update-calendar
ntp server key 10

INBUPPVG501#sh ntp associations detail configured, authenticated, insane, invalid, unsynced, stratum 16
ref ID .INIT., time 00000000.00000000 (05:30:00.000 IST Mon Jan 1 1900)
our mode client, peer mode unspec, our poll intvl 64, peer poll intvl 1024
root delay 0.00 msec, root disp 0.00, reach 0, sync dist 15940.24
delay 0.00 msec, offset 0.0000 msec, dispersion 15937.50
precision 2**24, version 4
org time 00000000.00000000 (05:30:00.000 IST Mon Jan 1 1900)
rec time 00000000.00000000 (05:30:00.000 IST Mon Jan 1 1900)
xmt time DE520F2F.5A63DFE1 (14:19:51.353 IST Tue Mar 13 2018)
filtdelay =     0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00
filtoffset =    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00
filterror =  16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0
minpoll = 6, maxpoll = 10
Mohammed SaleemAsked:
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I think that in order to the router clock to syncronize you have to first set it manually since  NTP won't reset the local clock and sync if it is not reasonably close to begin with (I don't recall if it is 3 hours or 30 minutes).

Now your clock is off by 118 years...

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Andy BartkiewiczNetwork AnalystCommented:
Doesn't look like ntp is setup correctly or the NTP server is unreachable. Under the show ntp status it should show the ntp server as a reference if it's working correctly. Commands should look something like this:

clock timezone PACIFIC -8
clock summer-time SUMMER recurring 2 Sun Mar 3:00 1 Sun Nov 3:00

ntp update-calendar
ntp server
atlas_shudderedSr. Network EngineerCommented:
zvitam is on the right path.  The only thing to add is to pull out your NTP config before you manually update the time/time zone/etc.  Leaving it in after already failing can lead to NTP flaking out and still not working as expected.  Add it back in after you have updated the time.
atlas_shudderedSr. Network EngineerCommented:
Question appears to have been abandoned.  Suggest close and distribution.
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