Solved

DFS Replication not working

Posted on 2013-05-22
20
1,454 Views
Last Modified: 2013-05-31
We have two file servers running DFS Replication in two different sites. Servers OS, Windows Server 2008 R2.

Although I had successfully set up the DFS replication between them, it seems not to work properly, experiencing a strange behavior. While running dfsdiag from serverA I get errors for validating namespace "The RPC server is unavailable" and for validating registry entries "The network path was not found". Dfsdiag runs successfully on serverB. I try to access the namespace \\serverA\data from serverB and vice-versa but it is not possible. I read many articles describing issues about the staging file size which in our case increased to 16GB. No success.

Please advise.
0
Comment
Question by:axe77
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 11
  • 9
20 Comments
 
LVL 78

Expert Comment

by:arnold
ID: 39192168
How much bandwidth is available between the two sites?
upstream/downstream on each end.  The lowest on one is the rule for both.
0
 
LVL 78

Expert Comment

by:arnold
ID: 39192195
Are the two systems in the same domain?  Do you have the two sites connected with a VPN?
Too many variations whose details are not included on what you tried and whether you reached some diagnostic causes for the issue at hand?
0
 

Author Comment

by:axe77
ID: 39193549
Thanx for your replies.

Two sites are connected through VPN which established via a dedicated leased line 100Mbps (up/down with 85ms latency).
The two systems are in the same domain but in different AD sites.

What I am trying to do is to have both fileservers synced as users travel all the time from one site to another.
0
Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

 
LVL 78

Expert Comment

by:arnold
ID: 39193845
Do you have any errors?
0
 

Author Comment

by:axe77
ID: 39195856
Event ID: 5014
Error: 1726 (The remote procedure call failed)
0
 
LVL 78

Expert Comment

by:arnold
ID: 39195887
http://social.technet.microsoft.com/Forums/en-US/winserverfiles/thread/2b58b4a4-3e0a-460e-b4e9-fd550e5e9c3b/

RPC services running on both?
Time chek? Are the two systems have a time that is close enough within 5minutes accounting for timezone?
0
 

Author Comment

by:axe77
ID: 39195895
RPC is running on both servers, no DNS issues and time is completely synced
0
 
LVL 78

Expert Comment

by:arnold
ID: 39195927
What connects the two sites? Make sure the issues not with an access restriction within a VPN.
0
 

Author Comment

by:axe77
ID: 39196202
There is no network issue as it was my first thought at the very beginning.

I made some extra tests.
Pure replication works OK between two servers. I created a new share which then I added it in a new replication group, and the replication started immediately. Any changes is synced instantly.
The problem only occurs when a replication group is a member of a namespace. I tried to delete the staging folder in case there was a corruption. After I restarted the servers, the replication started and run for about 20 minutes or so. No success either.
0
 
LVL 78

Expert Comment

by:arnold
ID: 39196229
Replication group deals with replication only, the publishing of the replicated directories should not be an issue unless the files are maintained open I.e. there is an anti-virus app that scans any file an access.  A replication attempt in this case will fail because the file will be seen as in use.
0
 

Author Comment

by:axe77
ID: 39198195
Firewall or antivirus S/W are off
0
 
LVL 78

Expert Comment

by:arnold
ID: 39198213
0
 

Author Comment

by:axe77
ID: 39198219
If you mean Firewall and AV are disabled on both servers.
The drives are mapped through Group Policies by using the DFS namespace (i.e. \\domain.com\data\Users)
0
 
LVL 78

Accepted Solution

by:
arnold earned 500 total points
ID: 39198304
Since you ran dfs dial, double check the DNS resolution for the servers to make sure there is no extraneous IP reference that causes issues.
0
 

Author Comment

by:axe77
ID: 39198330
DNS checked... no issue

I made two changes:
1. Enable IPv6
2. Delete DFSrPrivate folder

Now seems that something moving out there... watching and revert.
0
 
LVL 78

Expert Comment

by:arnold
ID: 39198392
DFSrProvate is a required directory structure dealing with staging/deleted/conflict etc.
0
 

Author Comment

by:axe77
ID: 39199449
DFSrPrivate folder recreated automatically as soon as the server restarted.
0
 
LVL 78

Expert Comment

by:arnold
ID: 39199460
What is the status of replication at this point?
0
 

Author Comment

by:axe77
ID: 39200412
The replication seems to be in progress. I have got many messages in the Event Viewer verifying this. Nevertheless, I made a test to create a file in serverA which it has not been appeared in serverB yet.

Still waiting...
0
 
LVL 78

Expert Comment

by:arnold
ID: 39200819
Run the DFS report to see how many files need to be replicated.
0

Featured Post

Free NetCrunch network monitor licenses!

Only on Experts-Exchange: Sign-up for a free-trial and we'll send you your permanent license!

Here is what you get: 30 Nodes | Unlimited Sensors | No Time Restrictions | Absolutely FREE!

Act now. This offer ends July 14, 2017.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A hard and fast method for reducing Active Directory Administrators members.
After seeing many questions for JRNL_WRAP_ERROR for replication failure, I thought it would be useful to write this article.
This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles to another domain controller. Log onto the new domain controller with a user account t…
This tutorial will walk an individual through setting the global and backup job media overwrite and protection periods in Backup Exec 2012. Log onto the Backup Exec Central Administration Server. Examine the services. If all or most of them are stop…

691 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question