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NTP is showing unsyncronized in cisco 3650

Noovi
Level 1
Level 1

KABZ1016#sh run | i ntp

ntp source Vlan260

ntp server 10.162.251.72

ntp server 10.162.251.71

KABZ1016#

 

KABZ1016#sh 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

ntp uptime is 16310500 (1/100 of seconds), resolution is 4000

reference time is 00000000.00000000 (00:00:00.000 GMT Mon Jan 1 1900)

clock offset is 0.0000 msec, root delay is 0.00 msec

root dispersion is 0.58 msec, peer dispersion is 0.00 msec

loopfilter state is 'NSET' (Never set), drift is 0.000000000 s/s

system poll interval is 64, never updated.

KABZ1016#sh ntp ass

 

  address         ref clock       st   when   poll reach  delay  offset   disp

 ~10.162.251.72   10.162.251.71    2     49     64   377  0.996 3567718  1.923

 ~10.162.251.71   .LOCL.           1     45     64     7  0.997 3567717  1.692

 * sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured

KABZ1016#

 

KABZ1016#ping 10.162.251.71

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.162.251.71, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/2 ms

KABZ1016#ping 10.162.251.72

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.162.251.72, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

 

Please help me to resolve this, i have attached debugs logs too

19 Replies 19

I implement NTP with same scenario and it worked for me on first attempt.

 

I just configure all the switches to get time from master not from peers.

 

Hi, Are you running the VMs on Hyper-V? If so, then check that time sync(under integration .services) is disabled on the host. Could be your VMs are syncing with a host that has no time source. Thanks John
**Please rate posts you find helpful**

Hello John,

 

My VMs are running on Esxi hosts .

 

My switches are getting time sync from my DC. My Dc is also getting time sync from External Time server and acting as a internal time server.

 

Thanks

Hi,

 

What is the output of the following command on both VMs:

 

w32tm  /query /status

 

Thank

John

**Please rate posts you find helpful**

On DC Vm, It show me the external servers that its syncing, On other servers it shows My DC's IP.

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