Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 2964
  • Last Modified:

Active Directory Replication question

Every now and then I'll run a repadmin /showreps to see how our replication is doing on our DCs. This last time I did it, I got this error at the end of the log.

DsReplicaGetInfo() failed with status 8453 (0x2105):
    Replication access was denied.
DsReplicaGetInfo() failed with status 8453 (0x2105):
    Replication access was denied.

Every one of my dc's that had windows 2008 server installed had this, whereas my windows 2003 dc's didn't. I also ran a repadmin /replsummary and got this

Source DSA          largest delta    fails/total %%   error
 ENG-DC1                   21m:22s    0 /  18    0
 ENG-DC2                   14m:54s    0 /  17    0
 ENG-DCA                   14m:54s    0 /  18    0
 RTC-ENG-DCA               21m:22s    0 /  17    0

Destination DSA     largest delta    fails/total %%   error
 ENG-DC1                   13m:40s    0 /  19    0
 ENG-DC2                   13m:28s    0 /  15    0
 ENG-DCA                   02m:23s    0 /  19    0
 RTC-ENG-DCA               29m:54s    0 /  15    0

The other three DC's had similar results of no fails or errors in their /replsummary log.
 
I did some googling on the "Replication access was denied" message and it sent me down the path to verify if my USN numbers matched up to see if I had a USN rollback. I've attached a screen capture of my 4 domain controllers and how they matched up with each other. I compared them all against the DC in the middle, and highlighted in red the discrepancies.

USN discrepancies between DCs
I'm at a loss for what to do at this point, the summary showed no errors, but clearly there's a discrepancy between the domain controllers on the USN numbers.

We have about 10 users added and close to that number disabled or removed every day, I have backups for each DC, but I don't know which ones I should restore or if I should restore at all. The other option that was stated if I had a rollback occur was to demote then re-promote all my DCs.

Any suggestions down which path I should go?
0
labops
Asked:
labops
  • 3
  • 3
1 Solution
 
Chris HInfrastructure ManagerCommented:
0
 
Mike KlineCommented:
What events are you seeing in your log?  Did you see this article

http://support.microsoft.com/kb/2022387

Are these DCs in the same site or different site?  The largest delta denotes the longest replication gap amongst all replication links for a particular domain controller.   If they are in different sites that is not horrible and no fails is a good thing

Thanks

Mike
0
 
labopsAuthor Commented:
Hi Mike,

They are indeed in different sites, I just didn't know if the size of the delta was something to be concerned with. I'll look through the link you provided to do some more testing.
0
Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

 
Mike KlineCommented:
also look at the repadmin whitepaper

http://www.microsoft.com/en-us/download/details.aspx?id=9028

notice their deltas in the screenshots.

Thanks

Mike
0
 
labopsAuthor Commented:
Mike,

Using your link, I started down the path of checking with dcdiag, I got some errors pointing to the same problem, so I searched for that string in google. The result that I got on the first try said "run your command prompt with elevated privileges and try again"

I did and didn't get a single error.

This is me smacking my forehead, how many times has not running the cmd prompt in elevated mode bit me.

Thanks for getting me on the right track.
0
 
labopsAuthor Commented:
I've requested that this question be closed as follows:

Accepted answer: 500 points for mkline71's comment #a38806353
Assisted answer: 0 points for labops's comment #a38806445

for the following reason:

Always remember to run your cmd in elevated privileges.
0
 
Mike KlineCommented:
excellent, glad you are good to go...clean replication :)
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Easily Design & Build Your Next Website

Squarespace’s all-in-one platform gives you everything you need to express yourself creatively online, whether it is with a domain, website, or online store. Get started with your free trial today, and when ready, take 10% off your first purchase with offer code 'EXPERTS'.

  • 3
  • 3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now