I have a small backbone test lab that has an NTP setup:
NTP Source ---> ROUTER1 --> Router2 and other routers reference to ROUTER1 as the server.
show ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 190.7348 Hz, actual freq is 190.7263 Hz, precision is 2**18
reference time is zxcvb.zxcvb (13:50:07.729 EST Sat Jan 24 2015)
clock offset is 0.0620 msec, root delay is 1.56 msec
root dispersion is 999.74 msec, peer dispersion is 0.12 msec
show ntp associations
address ref clock st when poll reach delay offset disp
~172.x.x.x 192.168.1.1 2 462 1024 377 1.1 -155.5 2.0
* master (synced), # master (unsynced), + selected, - candidate, ~ configured
#show ntp associations detail
172.x.x.x configured, insane, invalid, stratum 2
ref ID 192.168.1.1, time D8732173.58302E63 (16:50:59.344 EST Wed Jan 28 2015)
our mode client, peer mode server, our poll intvl 1024, peer poll intvl 1024
root delay 0.60 msec, root disp 6295.41, reach 377, sync dist 6298.248
delay 1.10 msec, offset -155.5497 msec, dispersion 2.00
precision 2**22, version 3
org time zxcvb.zxcvb1 (16:51:23.581 EST Wed Jan 28 2015)
rcv time zxcvb.zxcvb2 (16:51:23.737 EST Wed Jan 28 2015)
xmt time zxcvb.zxcvb3 (16:51:23.736 EST Wed Jan 28 2015)
filtdelay = 1.10 1.43 1.04 1.05 1.04 1.01 1.04 0.99
filtoffset = -155.55 -154.43 -153.66 -152.62 -151.48 -150.40 -149.14 -147.00
filterror = 0.02 15.64 31.27 46.89 62.52 78.14 93.77 109.39
I do not have access to the NTP Source as there is a separate team managing it.
For some reasons all other routers that is running NTP V3 is not syncing with ROUTER1.
(ROUTER1 is in V4. Other routers in V4 are working fine.)
NTP Source ---> ROUTER1 --> Router2 and other routers reference to ROUTER1 as the server.
Is it possible that the NTP Source had done some update? or server changes that can affect the routers which is under NTP v3?
Is there anyway to force NTP to sync? to the ROUTER1? as per our checking there is reachability.
