exchange 与 AD拓扑 不可用

asfsd

　　http://social.technet.microsoft.com/Forums/en-US/exchangesvrtransport/thread/9228dcd7-9b55-45f6-a7ac-90af2fbeca3a
　　What is best pratices for exchange 2007 AD sites topology configuration ?
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　　Friday, August 28, 2009 7:30 AM
　　cskhor
　　70 Points
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　　Hi,
　　We have multiple AD servers exits in china and singapore. Each country have multiple AD in diff subnet. Currently the AD site configuration is simple , everthing are in default sites and no subnet was configure . The root AD and exchange servers are in singapore and same subnet.
　　So my question is :
　　1)what is the best pratice that to configure the AD sites so that the exchange server will have better perfomance ? Currently the AD replication is fast but for exchange sometimes users will experience slowness when they are connecting to china GC which give low latency.
　　2)I tried to create one more sites and move all the china DC to the new sites , however i keep receiving topology error 2142 &2501(Topology failed to discover. Any reason ?
　　Event Type: Error
　　Event Source: MSExchange ADAccess
　　Event Category: General

　　Event>　　Date:  8/28/2009
　　Time:  2:52:20 PM
　　User:  N/A
　　Computer: BE11
　　Description:
　　Process MSEXCHANGEADTOPOLOGY (PID=2528). The site monitor API was unable to verify the site name for this Exchange computer - Call=DsGetSiteNameW Error code=800703e5. Make sure that Exchange server is correctly registered on the DNS server.
　　For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
　　Event Type: Error
　　Event Source: MSExchange ADAccess
　　Event Category: Topology

　　Event>　　Date:  8/28/2009
　　Time:  2:59:31 PM
　　User:  N/A
　　Computer: BE22
　　Description:
　　Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=2360). Topology discovery failed, error 0x8007077f.
　　For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
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　　Friday, August 28, 2009 1:09 PM
　　Scott Feltmann
　　Microsoft
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　　For a global AD environment the best thing you can do is have sites created based on either the Region or the physical Site.  This will prevent Exchange from using a GC outside of that region.  An Exchagne server in China should not be using a DC in singapore for lookups and visa versa.
　　Best bet would be to create a new site, assign subnets to that site and let AD reassign the objects.  Make sure you set up site links so that replication can occur properly.  I would set up the interval to 15 minutes to keep AD up to date as much as possible.  The default setting is 180 minutes.
　　--------------------------------------------------------------------------------
　　SF - MCITP:EMA, MCTS: MOSS 2007, OCS 2007, Exchange 2007
　　Marked As Answer byAllen SongMicrosoft Contingent Staff, ModeratorFriday, September 04, 2009 8:49 AM
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　　Friday, August 28, 2009 1:09 PM
　　Scott Feltmann
　　Microsoft
　　2,130 Points
　　0
　　Vote As Helpful
　　For a global AD environment the best thing you can do is have sites created based on either the Region or the physical Site.  This will prevent Exchange from using a GC outside of that region.  An Exchagne server in China should not be using a DC in singapore for lookups and visa versa.
　　Best bet would be to create a new site, assign subnets to that site and let AD reassign the objects.  Make sure you set up site links so that replication can occur properly.  I would set up the interval to 15 minutes to keep AD up to date as much as possible.  The default setting is 180 minutes.
　　--------------------------------------------------------------------------------
　　SF - MCITP:EMA, MCTS: MOSS 2007, OCS 2007, Exchange 2007
　　Marked As Answer byAllen SongMicrosoft Contingent Staff, ModeratorFriday, September 04, 2009 8:49 AM
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　　Tuesday, September 01, 2009 10:03 AM
　　Allen Song
　　Microsoft
　　(MSFT CSG)
　　7,580 Points
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　　Hi,
　　To create the AD sites, the best practice is based on the Regional or Physical locations.

　　For the error message, please try to use DCdiag/Netdiag to check if we have network or DC connection>　　Thanks
　　Allen
　　两台DC 需要建立站点，需要子网设置IP地址，