You may receive DFS referrals that contain a list of random DFS targets, random SYSVOL or NETLOGON referrals, or experience slow performance when you access a shared folder in a DFS namespace on a Windows Server 2003-based computer
- The client computer may receive a referral that contains a list of DFS targets that are random or in non-optimal order in terms of the Active Directory site cost from DFS client to DFS target servers.
Note To verify whether the client computer is experiencing this problem, examine the referral that is received from the DFS server. The problem exists if the first DFS target server in the referral is not optimal from the perspective of the DFS client.
- You may receive random SYSVOL or NETLOGON referrals from the DFS server when a DFS client tries to access scripts and policies that are stored in the SYSVOL or NETLOGON shared folders on domain controllers. This behavior may cause a longer than usual logon delay, because you are retrieving SYSVOL data from a remote site domain controller.
Note Domain controllers generate site-costed SYSVOL and NETLOGON referrals only if theSiteCostedReferralsregistry entry is added to the registry on all domain controllers, and the DFS service is restarted. When theSiteCostedReferralsregistry entry is not added, SYSVOL or NETLOGON referrals contains two sets of targets. The first set contains all the targets in the same site as the client. The second set contains all remaining targets. TheSiteCostedReferralsregistry entry is located in the following registry subkey:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dfs\Parameters
Value Name: SiteCostedReferrals
Data Type: REG_DWORD
- You may experience slow performance. You experience this symptom when you access a shared folder on a target DFS server that is located far away on a wide area network (WAN) and when network latencies are high.
- You may experience excessive bandwidth consumption by the client computer. You experience this symptom when you access large amount of data from a target DFS server whose site cost is high.
When a DFS server receives a referral request from a client, the DFS server uses the IP address of the client to determine the client’s site. The DFS server sorts the list of target servers in the referral response in terms of increasing site cost from the DFS client to the target server.
When the SMB Service server provides an incorrect DFS client IP address to the Windows Server 2003-based DFS server, the client receives a referral that contains a list of DFS targets that are random or in non-optimal order in terms of the Active Directory site cost from DFS client to DFS targets.
Service pack informationTo resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
Hotfix informationA supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.Important You must install this hotfix on the DFS server computer.
PrerequisitesTo apply this hotfix, you must have Windows Server 2003 SP1 installed on the computer.
Note Windows Server 2003 SP1 is included in x64-based versions of Windows Server 2003.
Restart requirementYou must restart the computer after you apply this hotfix.
Hotfix replacement informationThis hotfix does not replace any other hotfixes.
File informationThe English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Windows Server 2003, 32-bit versions with Service Pack 1
Date Time Version Size File name -------------------------------------------------------- 11-Aug-2005 01:12 5.2.3790.2506 360,448 Srv.sys
Windows Server 2003, 64-bit Itanium-based versions with Service Pack 1
Date Time Version Size File name Platform -------------------------------------------------------------------- 11-Aug-2005 05:57 5.2.3790.2506 1,108,992 Srv.sys
Windows Server 2003, x64-based versions
Date Time Version Size File name -------------------------------------------------------------- 11-Aug-2005 19:28 5.2.3790.2506 670,208 Srv.sys
--mup.sys--2 entries...Entry: \domainname.company.com\DFSrootShortEntry: \domainname.company.com\DFSrootExpires in 300 secondsUseCount: 0 Type:0x81 ( REFERRAL_SVC DFS ) 0:[\servername.domainname.company.com\DFSroot] State:0x19 ( ACTIVE ) 1:[\servername2.domainname.company.com\DFSroot] State:0x09 ( )Note In this example output, the first entry is “servername.domainname.company.com.”
You can find the non-optimal ordering from the referral cache. To do this, examine the first entry and verify whether this server is located in the client computer’s site or in a remote site. To view the remote server names, examine the network traces. You can view the remote server names in the referral response frame.
To verify random SYSVOL or NETLOGON referrals in the referral cache, verify whether the first domain controller that is listed in the referral cache is located in the client computer's site or in a remote site.
SMB: R transact2 NT Get DFS Referral (response to frame x) Referrals Referral Version: 3 Size: 34 Server Type: SMB Server (1) Flags: 0x0000 Proximity: 300 TTL: 0 Path Offset: 1054 Alt Path Offset: 1114 Node Offset: 1174 Path: \domainname.company.com\DFSroot Alt Path: \domainname.company.com\DFSroot Node: \servername.domainname.company.com\DFSroot <====== is this server in the client's site?For more information about how to capture network traffic, click the following article number to view the article in the Microsoft Knowledge Base:
- DFS Technical Reference
- DFS Site Discovery and Target Selection
Technical support for x64-based versions of Microsoft WindowsYour hardware manufacturer provides technical support and assistance for x64-based versions of Windows. Your hardware manufacturer provides support because an x64-based version of Windows was included with your hardware. Your hardware manufacturer might have customized the installation of Windows with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your x64-based version of Windows. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware.
For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site:
Article ID: 905846 - Last Review: 10/09/2011 10:14:00 - Revision: 6.0
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