emPSN - East Midlands Public Services Network 01604 879869
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NTP Services

NTP Services

Within the emPSN network we do not operate our own NTP time services but we recommend customers use the NTP services available the Janet/JISC network as these are shorter path to you – configure 2 or 3 of the listed hosts.  As tertiary we also recommend the use of uk.pool services shown belo.

Primary NTP Services
ntp0.ja.net
ntp1.ja.net
ntp2.ja.net
ntp3.ja.net
ntp4.ja.net

Tertiary NTP Services
0.uk.pool.ntp.org
1.uk.pool.ntp.org
2.uk.pool.ntp.org
3.uk.pool.ntp.org

 

NTP Checking

Windows uses W32TM.EXE to display a computers time service information.  This command can be used to determine the time on a remote device, it can also be used to check or confirm connection to the remote device.

The output below shows the query against one of the JANET time sources in comparison to the local computers date and time information.

C:\>w32tm /stripchart /computer:ntp0.ja.net /samples:3
Tracking ntp0.ja.net [193.62.22.66:123].
Collecting 3 samples.
The current time is 01/05/2018 18:19:00.
18:19:00 d:+00.0155646s o:-00.0004336s [      *      ]
18:19:02 d:+00.0155619s o:-00.0014018s [      *      ]
18:19:04 d:+00.0155574s o:-00.0014877s [      *      ]
 NTP servers will not respond to PING by default this would need to be enabled.

 

Other test to confirm NTP peering is

C:\>w32tm /query /peers

#Peers: 3

Peer: ntp0.ja.net,0x1
State: Active
Time Remaining: 3583.6508428s
Mode: 1 (Symmetric Active)
Stratum: 1 (primary reference - syncd by radio clock)
PeerPoll Interval: 15 (32768s)
HostPoll Interval: 6 (64s)

Peer: ntp1.ja.net,0x1
State: Active
Time Remaining: 3583.6508428s
Mode: 1 (Symmetric Active)
Stratum: 1 (primary reference - syncd by radio clock)
PeerPoll Interval: 15 (32768s)
HostPoll Interval: 6 (64s)

Peer: ntp3.ja.net,0x1
State: Active
Time Remaining: 3583.6508428s
Mode: 1 (Symmetric Active)
Stratum: 1 (primary reference - syncd by radio clock)
PeerPoll Interval: 15 (32768s)
HostPoll Interval: 6 (64s)
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