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Aruba Employee
Posts: 5
Registered: ‎02-02-2016

Server 2012R2 NTP to controller fails

Does anyone have a controller running 6.4.3.5 getting time via NTP from Windows Server 2012R2? - Ours will not get the time. Here are a couple commands which show to me, it is configured right. The Server does supply time to a Hewlett Packard 2920al switch, but the controller will not sychronize.

 

(ControllerA) #show ntp peer 10.1.21.100

remote ::, local ::
hmode client, pmode client, stratum 16, precision -19
leap 11, refid [73.78.73.84], rootdistance 0.00000, rootdispersion 5.19585
ppoll 10, hpoll 10, keyid 0, version 4, association 47521
reach 000, unreach 236, flash 0x1620, boffset 0.00000, ttl/mode 0
timer 0s, flags config, bclient
reference time:      00000000.00000000  Thu, Feb  7 2036  1:28:16.000
originate timestamp: 00000000.00000000  Thu, Feb  7 2036  1:28:16.000
receive timestamp:   da636016.b5f10a60  Mon, Feb  8 2016 13:42:30.710
transmit timestamp:  da636016.b5f10a60  Mon, Feb  8 2016 13:42:30.710
filter delay:  0.00000  0.00000  0.00000  0.00000
               0.00000  0.00000  0.00000  0.00000
filter offset: 0.000000 0.000000 0.000000 0.000000
               0.000000 0.000000 0.000000 0.000000
filter order:  0        1        2        3
               4        5        6        7
offset 0.000000, delay 0.00000, error bound 3.99217, filter error 0.00000
remote host:          10.1.21.100
local interface:      10.1.11.100
time last received:   554s
time until next send: 520s
reachability change:  237788s
packets sent:         236
packets received:     236
bad authentication:   0
bogus origin:         0
duplicate:            0
bad dispersion:       236
bad reference time:   0
candidate order:      0
flags:   config, bclient


(ControllerA) #show ntp server

NTP Server Table Entries

------------------------

 

Flags:     * Selected for synchronization

           + Included in the final selection set

           # Selected for synchronization but distance exceeds maximum

           - Discarded by the clustering algorithm

           = mode is client

 

  remote                                  local                                    st   poll   reach    delay     offset      disp

=========================================================================================================================================

=10.1.21.100                              10.1.11.100                              16 1024       0    0.00000     0.000000    3.99217

Guru Elite
Posts: 21,261
Registered: ‎03-29-2007

Re: Server 2012R2 NTP to controller fails

What is the difference in time between the controller and the NTP server?  Do you have the Timezone as well as the clock summer-time parameter set?

 



Colin Joseph
Aruba Customer Engineering

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Aruba Employee
Posts: 5
Registered: ‎02-02-2016

Re: Server 2012R2 NTP to controller fails

The time difference is 47 seconds. Both are set to Eastern Standard time, both have summer-time set.

 

Guru Elite
Posts: 21,261
Registered: ‎03-29-2007

Re: Server 2012R2 NTP to controller fails

You should let it sit to see if it gets closer.



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Contributor II
Posts: 36
Registered: ‎03-21-2011

Re: Server 2012R2 NTP to controller fails

Hi,

 

Did you solve the problem? What's the solution? I have the same issue.

 

Regards,

Patrick

Contributor II
Posts: 36
Registered: ‎03-21-2011

Re: Server 2012R2 NTP to controller fails

Don't worry. I found the solution.

 

If the Windows Server has no Internet, you can make the Windows Server more trustworthy by reduce the Dispersion to 0 (in Registry).

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