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Group:  English: Windows Server » microsoft.public.windows.server.active_directory
Thread: File replication problems with two domain contollers in 2 time zones

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File replication problems with two domain contollers in 2 time zones
<N> 12/29/2008 8:29:18 PM
Hi, I have 2 domain controllers, 1 in the Eastern Standard Time (EST) time
zone and 1 in the Mountain Standard Time (MST) time zone. A 2 hour
difference.

I can replicate changes from EST to MST but I can't replicate changes from
MST to EST. There's no error reported when I run 'replicate now' only the
below message.

"One or more of these Active Directory connections are between domain
controllers in different sites. Active Directory will attempt to replicate
across these connections. For more information about how to verify
replication, see Help and Support."

Based on what I'm reading it seems the time difference might be an issue but
I'm not sure.

the 2 DC's are in different sites and different subnets.


any help would be appreciated.


Re: File replication problems with two domain contollers in 2 time zones
Meinolf Weber [MVP-DS] 12/29/2008 8:38:58 PM
Hello N,

Check with repadmin /showrepl to see errors on both DC's. Or Start, run and
type replmon for a GUI overview.

From: http://technet.microsoft.com/en-us/library/cc755994.aspx

Scheduling across time zones
When scheduling replication across time zones, consider the time difference
to ensure that replication does not interfere with peak production times
in the destination site.

Domain controllers store time in Coordinated Universal Time (UTC). When viewed
through the Active Directory Sites and Services snap-in, time settings in
site link object schedules are displayed according to the local time of the
computer on which the snap-in is being run. However, replication occurs according
to UTC.

For example, suppose Seattle adheres to Pacific Standard Time (PST) and Japan
adheres to Japan Standard Time (JST), which is 17 hours later. If a schedule
is set on a domain controller in Seattle and the site link on which the schedule
is set connects Seattle and Tokyo, the actual time of replication in Tokyo
is 17 hours later.

If the schedule is set to begin replication at 10:00 PM PST in Seattle, the
conversion can be computed as follows:

Convert 10:00 PM PST to 22:00 PST military time.

Add 8 hours to arrive at 06:00 UTC, the following day.

Add 9 hours to arrive at 15:00 JST.

15:00 JST converts to 3:00 PM.

Thus, when replication begins at 10:00 o'clock at night in Seattle, it is
occurring in Tokyo at 3:00 o'clock in the afternoon the following day. By
scheduling replication a few hours later in Seattle, you can avoid replication
occurring during working hours in Japan.



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


[Quoted Text]
> Hi, I have 2 domain controllers, 1 in the Eastern Standard Time (EST)
> time zone and 1 in the Mountain Standard Time (MST) time zone. A 2
> hour difference.
>
> I can replicate changes from EST to MST but I can't replicate changes
> from MST to EST. There's no error reported when I run 'replicate now'
> only the below message.
>
> "One or more of these Active Directory connections are between domain
> controllers in different sites. Active Directory will attempt to
> replicate across these connections. For more information about how to
> verify replication, see Help and Support."
>
> Based on what I'm reading it seems the time difference might be an
> issue but I'm not sure.
>
> the 2 DC's are in different sites and different subnets.
>
> any help would be appreciated.
>

Re: File replication problems with two domain contollers in 2 time zones
<N> 12/29/2008 9:33:57 PM
Thanks for the quick reply. Everything appears to be running normally.
Replication is occuring.

My issue is when I add a new user to the MST AD it does not replicate over
when I do the manual "replicate now" option. This works when I manually go
from EST to MST.

Nick

<Meinolf Weber [MVP-DS]> wrote in message
news:ff16fb66118f58cb3814fddcbd10[ at ]msnews.microsoft.com...
[Quoted Text]
> Hello N,
>
> Check with repadmin /showrepl to see errors on both DC's. Or Start, run
> and type replmon for a GUI overview.
> From: http://technet.microsoft.com/en-us/library/cc755994.aspx
>
> Scheduling across time zones
> When scheduling replication across time zones, consider the time
> difference to ensure that replication does not interfere with peak
> production times in the destination site.
>
> Domain controllers store time in Coordinated Universal Time (UTC). When
> viewed through the Active Directory Sites and Services snap-in, time
> settings in site link object schedules are displayed according to the
> local time of the computer on which the snap-in is being run. However,
> replication occurs according to UTC.
>
> For example, suppose Seattle adheres to Pacific Standard Time (PST) and
> Japan adheres to Japan Standard Time (JST), which is 17 hours later. If a
> schedule is set on a domain controller in Seattle and the site link on
> which the schedule is set connects Seattle and Tokyo, the actual time of
> replication in Tokyo is 17 hours later.
>
> If the schedule is set to begin replication at 10:00 PM PST in Seattle,
> the conversion can be computed as follows:
>
> Convert 10:00 PM PST to 22:00 PST military time.
>
> Add 8 hours to arrive at 06:00 UTC, the following day.
>
> Add 9 hours to arrive at 15:00 JST.
>
> 15:00 JST converts to 3:00 PM.
>
> Thus, when replication begins at 10:00 o'clock at night in Seattle, it is
> occurring in Tokyo at 3:00 o'clock in the afternoon the following day. By
> scheduling replication a few hours later in Seattle, you can avoid
> replication occurring during working hours in Japan.
>
>
>
> 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
>
>> Hi, I have 2 domain controllers, 1 in the Eastern Standard Time (EST)
>> time zone and 1 in the Mountain Standard Time (MST) time zone. A 2
>> hour difference.
>>
>> I can replicate changes from EST to MST but I can't replicate changes
>> from MST to EST. There's no error reported when I run 'replicate now'
>> only the below message.
>>
>> "One or more of these Active Directory connections are between domain
>> controllers in different sites. Active Directory will attempt to
>> replicate across these connections. For more information about how to
>> verify replication, see Help and Support."
>>
>> Based on what I'm reading it seems the time difference might be an
>> issue but I'm not sure.
>>
>> the 2 DC's are in different sites and different subnets.
>>
>> any help would be appreciated.
>>
>
>


Re: File replication problems with two domain contollers in 2 time zones
"Jorge Silva" <jorgesilva_pt[ at ]hotmail.com> 12/30/2008 9:21:46 AM
Hi
That is NOT an ERROR, that's normal and by design.

--
I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MCSE, MVP Directory Services

Please no e-mails, any questions should be posted in the NewsGroup
This posting is provided "AS IS" with no warranties, and confers no rights.
<N> wrote in message news:49593394$0$4892$607ed4bc[ at ]cv.net...
[Quoted Text]
> Hi, I have 2 domain controllers, 1 in the Eastern Standard Time (EST) time
> zone and 1 in the Mountain Standard Time (MST) time zone. A 2 hour
> difference.
>
> I can replicate changes from EST to MST but I can't replicate changes from
> MST to EST. There's no error reported when I run 'replicate now' only the
> below message.
>
> "One or more of these Active Directory connections are between domain
> controllers in different sites. Active Directory will attempt to
> replicate across these connections. For more information about how to
> verify replication, see Help and Support."
>
> Based on what I'm reading it seems the time difference might be an issue
> but I'm not sure.
>
> the 2 DC's are in different sites and different subnets.
>
>
> any help would be appreciated.
>
>

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