2.nd NTPserver?

Hello all

Our PDC is acting as NTP-server in our domain. I have been asked to setup
another NTP-server which should synchronise with the PDC and then serve as
NTP-server for all our networking-gear -switches, routers, firewalls (for
reason unexplained we can not use the PDC). Can this be done? can you run 2
NTP servers on the same network? If so how can it be done? What is best
practise?

Best regards from Denmark
/Towli

Hello Towli,

In a domain the PDCEmulator is the one and only time source. All other DC's
sync with it and member servers and workstations sync with just one available
DC.

So if you just need a different server to point your switches to you can
choose another DC, because the time is the same as on the PDCEmulator.

Also the PDCEmulator should sync either with an external timesource or it's
internal hardware clock, so you can also use the same external time server
for your switches to have the same time as the PDCEmulator, ofcourse if you
change the external time source you have to change on all switches etc.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> Hello all
>
> Our PDC is acting as NTP-server in our domain. I have been asked to
> setup another NTP-server which should synchronise with the PDC and
> then serve as NTP-server for all our networking-gear -switches,
> routers, firewalls (for reason unexplained we can not use the PDC).
> Can this be done? can you run 2 NTP servers on the same network? If so
> how can it be done? What is best practise?
>
> Best regards from Denmark
> /Towl

Thank you very much Meinolf.
We have other DC's running, can i assume that they are acting as NTP-servers
as per default, or do i have to ask the server admins to activate this
somehow?

/T

"Meinolf Weber [MVP-DS]" <meiweb(nospam)@gmx.de> skrev i meddelelsen
news: .com...
> Hello Towli,
>
> In a domain the PDCEmulator is the one and only time source. All other
> DC's sync with it and member servers and workstations sync with just one
> available DC.
>
> So if you just need a different server to point your switches to you can
> choose another DC, because the time is the same as on the PDCEmulator.
>
> Also the PDCEmulator should sync either with an external timesource or
> it's internal hardware clock, so you can also use the same external time
> server for your switches to have the same time as the PDCEmulator,
> ofcourse if you change the external time source you have to change on all
> switches etc.
>
> Best regards
>
> Meinolf Weber
> Disclaimer: This posting is provided "AS IS" with no warranties, and
> confers no rights.
> ** Please do NOT email, only reply to Newsgroups
> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>
>> Hello all
>>
>> Our PDC is acting as NTP-server in our domain. I have been asked to
>> setup another NTP-server which should synchronise with the PDC and
>> then serve as NTP-server for all our networking-gear -switches,
>> routers, firewalls (for reason unexplained we can not use the PDC).
>> Can this be done? can you run 2 NTP servers on the same network? If so
>> how can it be done? What is best practise?
>>
>> Best regards from Denmark
>> /Towli
>
>

Hello Towli,

As long as the 'Windows Time' service is running it should work. Also port
123 UDP has to be open when using firewall's in between.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> Thank you very much Meinolf.
> We have other DC's running, can i assume that they are acting as
> NTP-servers
> as per default, or do i have to ask the server admins to activate this
> somehow?
> /T
>
> "Meinolf Weber [MVP-DS]" <meiweb(nospam)@gmx.de> skrev i meddelelsen
> news: .com...
>
>> Hello Towli,
>>
>> In a domain the PDCEmulator is the one and only time source. All
>> other DC's sync with it and member servers and workstations sync with
>> just one available DC.
>>
>> So if you just need a different server to point your switches to you
>> can choose another DC, because the time is the same as on the
>> PDCEmulator.
>>
>> Also the PDCEmulator should sync either with an external timesource
>> or it's internal hardware clock, so you can also use the same
>> external time server for your switches to have the same time as the
>> PDCEmulator, ofcourse if you change the external time source you have
>> to change on all switches etc.
>>
>> Best regards
>>
>> Meinolf Weber
>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>> confers no rights.
>> ** Please do NOT email, only reply to Newsgroups
>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>> Hello all
>>>
>>> Our PDC is acting as NTP-server in our domain. I have been asked to
>>> setup another NTP-server which should synchronise with the PDC and
>>> then serve as NTP-server for all our networking-gear -switches,
>>> routers, firewalls (for reason unexplained we can not use the PDC).
>>> Can this be done? can you run 2 NTP servers on the same network? If
>>> so how can it be done? What is best practise?
>>>
>>> Best regards from Denmark
>>> /Towl

Thanks again.
We, in the networking dept., were asked to setup our Dhcp-server (which is
the only server under our control) as an Ntp-server (and as i told make it
syncronize with the Pdc). Is this possible?
Is it bad advice?

/T


"Meinolf Weber [MVP-DS]" <meiweb(nospam)@gmx.de> skrev i meddelelsen
news: .com...
> Hello Towli,
>
> As long as the 'Windows Time' service is running it should work. Also port
> 123 UDP has to be open when using firewall's in between.
>
> Best regards
>
> Meinolf Weber
> Disclaimer: This posting is provided "AS IS" with no warranties, and
> confers no rights.
> ** Please do NOT email, only reply to Newsgroups
> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>
>> Thank you very much Meinolf.
>> We have other DC's running, can i assume that they are acting as
>> NTP-servers
>> as per default, or do i have to ask the server admins to activate this
>> somehow?
>> /T
>>
>> "Meinolf Weber [MVP-DS]" <meiweb(nospam)@gmx.de> skrev i meddelelsen
>> news: .com...
>>
>>> Hello Towli,
>>>
>>> In a domain the PDCEmulator is the one and only time source. All
>>> other DC's sync with it and member servers and workstations sync with
>>> just one available DC.
>>>
>>> So if you just need a different server to point your switches to you
>>> can choose another DC, because the time is the same as on the
>>> PDCEmulator.
>>>
>>> Also the PDCEmulator should sync either with an external timesource
>>> or it's internal hardware clock, so you can also use the same
>>> external time server for your switches to have the same time as the
>>> PDCEmulator, ofcourse if you change the external time source you have
>>> to change on all switches etc.
>>>
>>> Best regards
>>>
>>> Meinolf Weber
>>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>>> confers no rights.
>>> ** Please do NOT email, only reply to Newsgroups
>>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>>> Hello all
>>>>
>>>> Our PDC is acting as NTP-server in our domain. I have been asked to
>>>> setup another NTP-server which should synchronise with the PDC and
>>>> then serve as NTP-server for all our networking-gear -switches,
>>>> routers, firewalls (for reason unexplained we can not use the PDC).
>>>> Can this be done? can you run 2 NTP servers on the same network? If
>>>> so how can it be done? What is best practise?
>>>>
>>>> Best regards from Denmark
>>>> /Towli
>
>

Hello Towli,

As said before member servs synz with one available DC. Make sure the windows
time service is running and configure it for a test in one switch/router.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> Thanks again.
> We, in the networking dept., were asked to setup our Dhcp-server
> (which is
> the only server under our control) as an Ntp-server (and as i told
> make it
> syncronize with the Pdc). Is this possible?
> Is it bad advice?
> /T
>
> "Meinolf Weber [MVP-DS]" <meiweb(nospam)@gmx.de> skrev i meddelelsen
> news: .com...
>
>> Hello Towli,
>>
>> As long as the 'Windows Time' service is running it should work. Also
>> port 123 UDP has to be open when using firewall's in between.
>>
>> Best regards
>>
>> Meinolf Weber
>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>> confers no rights.
>> ** Please do NOT email, only reply to Newsgroups
>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>> Thank you very much Meinolf.
>>> We have other DC's running, can i assume that they are acting as
>>> NTP-servers
>>> as per default, or do i have to ask the server admins to activate
>>> this
>>> somehow?
>>> /T
>>> "Meinolf Weber [MVP-DS]" <meiweb(nospam)@gmx.de> skrev i meddelelsen
>>> news: .com...
>>>
>>>> Hello Towli,
>>>>
>>>> In a domain the PDCEmulator is the one and only time source. All
>>>> other DC's sync with it and member servers and workstations sync
>>>> with just one available DC.
>>>>
>>>> So if you just need a different server to point your switches to
>>>> you can choose another DC, because the time is the same as on the
>>>> PDCEmulator.
>>>>
>>>> Also the PDCEmulator should sync either with an external timesource
>>>> or it's internal hardware clock, so you can also use the same
>>>> external time server for your switches to have the same time as the
>>>> PDCEmulator, ofcourse if you change the external time source you
>>>> have to change on all switches etc.
>>>>
>>>> Best regards
>>>>
>>>> Meinolf Weber
>>>> Disclaimer: This posting is provided "AS IS" with no warranties,
>>>> and
>>>> confers no rights.
>>>> ** Please do NOT email, only reply to Newsgroups
>>>> ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
>>>>> Hello all
>>>>>
>>>>> Our PDC is acting as NTP-server in our domain. I have been asked
>>>>> to setup another NTP-server which should synchronise with the PDC
>>>>> and then serve as NTP-server for all our networking-gear
>>>>> -switches, routers, firewalls (for reason unexplained we can not
>>>>> use the PDC). Can this be done? can you run 2 NTP servers on the
>>>>> same network? If so how can it be done? What is best practise?
>>>>>
>>>>> Best regards from Denmark
>>>>> /Towl