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DFS-R on Server 2008 mode

I just set up DFS-R in Server 2008 mode with two servers in a mesh topology. The two servers are in different AD sites but there is a 50Mbps PTP line between them.

Server A syncs perfectly with Server B in a matter of one second. However Server B does not sync with Server A. Or it does about 10% of the time.

I've rebooted a few times as well. Any ideas what could be causing this?

No firewalls are being used in-between the two servers.
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fina27
Asked:
fina27
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1 Solution
 
Vince GlissonCommented:
Are any of the server involved SBS?
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fina27Author Commented:
Nope. Both are Server 2008 Std edition. However one server is 32-bit and the other is 64-bit. I don't think that matters though.
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Vince GlissonCommented:
Are the they in the same Domain? I see that you said differnet sites so need clarification.
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fina27Author Commented:
Yep same domain. But different sites and subnets.
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fina27Author Commented:
i just figured out its only happening to a few folders. I only have 5 total DFS folders, and its only doing it to two of them. Maybe something to do with the Dfsrprivate folders?
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Vince GlissonCommented:
Yes i think your on to something. Any difference in the persmissions from folders that sync and folders that do not?
 
 
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fina27Author Commented:
No difference at all. These are pretty public folders.... so the permissions are pretty much wide open. I tried increasing the staging quota from 4GB to 20GB considering these are large folders that are between 70GB-100GB. But that didnt work either.
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Vince GlissonCommented:
This article is about want can happen when there is left over FRS data when you move to  DFS-R, maybe the problem...
http://www.eggheadcafe.com/software/aspnet/29529027/dfsr--event-id-6402--df.aspx
What error are you getting in event viewer?
Any encrypted data in the folders in question?
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fina27Author Commented:
I'm not using FRS at all in my environment. I already migrated SYSVOL replication from FRS to DFSR. I'd like to stay away from ADSIedit.

Not getting any errors in event viewer. Health report says fine. When I do a Propagation report, it says "arrival pending" for Replication status from Server B to Server A.
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Vince GlissonCommented:
Your PTP link, is it private?
And wether it is or it isn't, do you run a VPN thru it?
No firewalls would also include Windows firewall?
DFS uses these ports...
TCP 135, 137, 139, 389, , 445
UDP 137, 138, 389, 445
 
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fina27Author Commented:
Yes it's private. We've been using it for a year without any connection issues. WIndows firewalls are off. No VPNs.

All dfsdiags come back clean as well. This is getting annoying
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Vince GlissonCommented:
dfsdiag comes back clean, and still no replication to Server A.
I feel your frustration...
Have you tried to create a share with same set of files and see if it will rep to Server A with no problem.
 
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fina27Author Commented:
Well the other shares work. The 3 shares that work are under 6GB. The shares that don't work are around 80GB-100GB. I think that has something to do with it.
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Vince GlissonCommented:
Were there alot of files that were just added to the DFS just prior to this problem starting.
A DFS share has a limit of 5,000 links...
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fina27Author Commented:
I don't know what you mean. I started off with files already in the destination location, then i set the source as primary and enabled replication. Took about two hours, and staging kept going over the watermark and having to come down again.
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fina27Author Commented:
Also i beleive that 5,000 limit doesnt apply for 2008 DFS
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fina27Author Commented:
I'm going to see if disabled RPC helps later tonight.
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fina27Author Commented:
So around noon, none of the workstations could connect to DFS shares. It had to do with this article.....

http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2008100113145148?Open&seg=ent

I'm guessing that was stopping the replication too. For now, ive disabled replication and I'll redo replication configuration this weekend.
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Vince GlissonCommented:
Good info fina, i'm setting up a small net soon and it will have DFS-R W2K8 and Endpoint...
Award yourself some points LOL...good troubleshoot on this one...
mesavince
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fina27Author Commented:
Uninstalled Symantec fixed the issue of users not being able to connect to DFS. But I'm still experiencing 5-30 minute delays (only 1 way of replication) on one of the folders. It is the large folder... around 90GB.
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Vince GlissonCommented:
90 gigs is alot to put in a dfs-r folder...
Does the entire folder replicate even tho only 1 file has changed?
Sounds like the entire folder (90GB) is replicating, when it should be doing incremental replication.
 
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fina27Author Commented:
i can assure you that the entire folder is not replicating.
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fina27Author Commented:
The only errors i get from DFSdiag is the following:

Validating SiteAssociation of "fileservername" in every DC.
DFSDIAG_WARNING - APPL - SiteName from IP - ::1 of "fileservername" in DC - DC02 is NULL whi
le in ADSite it is Boston,
this can lead to different referral ordering.
DFSDIAG_WARNING - APPL - SiteName from IP - ::1 of "fileservername" in DC - DC01 is NULL whi
le in ADSite it is Boston,
this can lead to different referral ordering.
DFSDIAG_WARNING - APPL - SiteName from IP - ::1 of "fileservername" in DC - DC03 is NULL wh
ile in ADSite it is Boston,
this can lead to different referral ordering.



But from googling around, it doesnt seem too severe. All i could find is to enable IPv6. Which I'll try later tonight. I've also tried unchecking RDC on the replicating folder.
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fina27Author Commented:
I wish I had some clue on what is going on. I'd say about 30% of the time it works great. The other 70% of the time it takes about 30 minutes to replicate. However, if I restart the DFS Replication service on the troublesome server, it replicates immediately.
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fina27Author Commented:
I opened a Microsoft support ticket for the issue. The resolution was to stop the DFS-R service. Delete the replication group, then delete the DFSrprivate folders on both source and target for the folder. Then start the DFS-R service. Recreate the replication group and begin initial sync. I havent had any delays since I did this.
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