스위치 <-> 윈도우2008R2 NTP 서버

M1_RFC_C3850_SW_1#show ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 250.0000 Hz, actual freq is 250.0000 Hz, precision is 2**10
reference time is 00000000.00000000 (09:00:00.000 kst Mon Jan 1 1900)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 133.09 msec, peer dispersion is 0.00 msec
loopfilter state is 'FSET' (Drift set from file), drift is 0.000000000 s/s
system poll interval is 8, never updated.

M1_RFC_C3850_SW_1#show ntp associations detail
192.167.0.30 configured, insane, invalid, stratum 1
ref ID .LOCL., time DC0DEA9C.2089D932 (16:39:08.127 kst Wed Dec 28 2016)
our mode client, peer mode server, our poll intvl 64, peer poll intvl 64
root delay 0.00 msec, root disp 10041.03, reach 377, sync dist 10071.01
delay 9.00 msec, offset -85935674.3966 msec, dispersion 17.51
precision 2**6, version 4
org time 00000000.00000000 (09:00:00.000 kst Mon Jan 1 1900)
rec time DC0DF331.A29622EC (17:15:45.635 kst Wed Dec 28 2016)
xmt time DC0DF331.A29622EC (17:15:45.635 kst Wed Dec 28 2016)
filtdelay =     9.00    8.00    7.00    4.00    8.00    7.00    7.00    4.00
filtoffset = -859356 -859356 -859356 -859356 -859356 -859356 -859356 -859356
filterror =    16.60   17.60   18.64   19.66   20.68   21.70   22.69   23.69
minpoll = 6, maxpoll = 10

M1_RFC_C3850_SW_1#show clock
*17:09:31.477 kst Thu Dec 29 2016

show ntp associations detail 명령에서는 시간을 받아오는데요

show clock 에선 시간변경이 안되어있습니다.

show ntp status 에서는 unsync 로 나오는데요....

도무지 이유를 모르겠습니다...

윈도우 2008 에서 window time 서비스 올려주고...

구글링해서 레지스트리나 여러가지 설정을 해보았는데 안되네요....

도와주세요....