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DFS share using FQDN very slow | OK when using UNC path?

Posted on 2012-09-17
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Last Modified: 2012-09-25
Hi,

I am troubleshooting a DFS issue,
I have a 5 node File Server cluster with DFS setup - Windows Server 2003 & one location.

User’s folders are mapped to \\company.com\Users\JoeBloggs

On Windows 7 these shares are very slow to open and opening Microsoft office files is unworkable, very slow freezing etc...

But,

If I open the share using the DFS UNC path \\company\Users\JoeBloggs - it works perfect, speeds are fine etc...

I have searched the web and tried almost everything available, tried on the Client machines (Windows 7) Trust Centre settings, registry entries to disable file verification.

On the DFS servers,

I have done the following

DfsDnsConfig reg entry: http://support.microsoft.com/default.aspx?scid=kb;EN-US;244380 
Dfsutil /pktinfo looks ok
Double checked all permissions on DFS root right down to users directories - all looks ok.

Anyone see this behaviour before.

Thanks, Joe
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Question by:joe90kane
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8 Comments
 
LVL 24

Expert Comment

by:yo_bee
ID: 38409247

1.

when you say slow is it slow when you just enter the \\contoso.local or \\contoso.local\files
if Files is the share?

2.

How many DC do you have?
0
 
LVL 1

Author Comment

by:joe90kane
ID: 38409396
15 DC's

Its only slow when using

FQDN \\company.com\

If I use the netbios name \\company\

The speeds are perfect.

By slow I mean browsing the folders and opening MS Office files.
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LVL 24

Expert Comment

by:yo_bee
ID: 38409452
With 15 DC's do you have Sites and Services setup correctly?
If the one site is having issues resolving your S & S might be misconfigured or you did not add that DC to the list of DC's that hold the DFS value.

Can you confirm any of these scenarios?
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LVL 1

Author Comment

by:joe90kane
ID: 38409557
I have ran dfsdiag /TestReferral /DFSPath:\\company.com\share

See attached for the report. All looks OK but for some reason my PC (M02101) is showing up with a warning.

Host name: M02101  

Site: HSQ

Domain controller: DNDC01
-------------------------------------------------------------------------------
Host IP address                         Subnet-SiteMapping in AD
-------------------------------------------------------------------------------
::1                                     No mapping exists      
-------------------------------------------------------------------------------
Warning: The server has IP addresses with conflicting site associations

I have checked the sites and services and all looks ok.
dfs-report.txt
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LVL 24

Expert Comment

by:yo_bee
ID: 38409576
So it does sound like your S & S are misconfigured.
I would double check that and see what you find.
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LVL 1

Author Comment

by:joe90kane
ID: 38411023
I would agree but it is only affecting windows 7 clients. Windows XP clients are working perfectly???
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Accepted Solution

by:
joe90kane earned 0 total points
ID: 38417618
This is resolved now - Read permissions on the DFSRoot folder were setup incorrectly.
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LVL 1

Author Closing Comment

by:joe90kane
ID: 38431881
Resolved the issue.
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