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Aruba Employee

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

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?

 


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
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Aruba Employee

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

Re: Server 2012R2 NTP to controller fails

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


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
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Contributor II

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

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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