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Cisco 3750X wont sync to ntp server

sh version

 

Switch Ports Model              SW Version            SW Image
------ ----- -----              ----------            ----------
*    1 30    WS-C3750X-24       15.0(2)SE5            C3750E-UNIVERSALK9-M

 

nsi.swcore01#sho ntp associations

  address         ref clock       st   when   poll reach  delay  offset   disp
 ~192.168.68.254  .INIT.          16      -   1024     0  0.000   0.000 15937.
 * sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured

 

 

nsi.swcore01#sh ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 119.2092 Hz, actual freq is 119.2092 Hz, precision is 2**17
reference time is 00000000.00000000 (08:00:00.000 GMT Mon Jan 1 1900)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 46985.14 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 64, never updated.

 

I tried to manually set the time so that the ntp server and the switch will have almost identical time, and btw NTP Server is a firewall, IP of the switch is allowed, and im actually seeing logs on the firewall side(watchguard) that it is trying to sync w/ the ntp server

 

 

7 REPLIES
Hall of Fame Super Gold

Out of curiosity, this NTP

Out of curiosity, this NTP server of yours, is this a Windows-based server? If it is, it ain't going to work. How MS defines NTP/SNTP is not the same as IEEE standard which Cisco is based on.
New Member

NTP server is watchguard

NTP server is watchguard firewall, other devices such as AD, ubuntu server is pointed on it and using its time sychronization and its working, i dont know why im having an issue w/ cisco 3750x

Hall of Fame Super Gold

Ok, so it's a non-Windows box

Ok, so it's a non-Windows box providing NTP/SNTP. Can I ask if you can downgrade the IOS to 15.0(2)SE4?
New Member

no i cant downgrade to a

no i cant downgrade to a lower version, is my current image causing the issue thats why it wont sync to NTP Server?  or is there something wrong w/ my commands?

Hall of Fame Super Gold

Not sure yet.  But if you can

Not sure yet.  But if you can downgrade to a more stable IOS, like 15.0(2)SE4, and NTP works then ...

Silver

Could you post how you did

Could you post how you did allow switch NTP access by IP?

HTH,

Dragan

HTH, Dragan
New Member

hi, i allowed that access by

hi, i allowed that access by adding the IP Address of my core swc to the NTP firewall rule therefore allowing it

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