Actually %logonserver% isn't necessarily the DC that the secure channel
is established with, it is the one that authenticated the session you
ran the command from. 

 

It is not maintained so it can be returned even when the DC it indicates
is unreachable.

 

If you want to know who the SC is established with, use nltest
/SC_QUERY:domainname

 

From: Michael B. Smith [mailto:[email protected]] 
Sent: Tuesday, January 19, 2010 10:43 AM
To: NT System Admin Issues
Subject: RE: just who's in charge here (dom controller query)

 

PCs will sync their clocks to whatever DC they have their secure channel
with (from a CMD prompt "set logonserver" will display that to you).

 

All DCs sync to the PDCe.

 

SO...everyone should still be in sync, to within milliseconds.

 

Are all of your DCs group catalog servers? Are all on the same subnet?

 

From: paul chinnery [mailto:[email protected]] 
Sent: Tuesday, January 19, 2010 1:36 PM
To: NT System Admin Issues
Subject: RE: just who's in charge here (dom controller query)

 

Here are the results from showrepl:

repadmin /showrepl w2k3-dc
Default-First-Site-Name\W2K3-DC
DC Options: IS_GC
Site Options: (none)
DC object GUID: 4c35da00-ce37-4623-9d4a-c2bc95e60f96
DC invocationID: bafcea0c-da79-439a-9315-9a235f56ed7e

==== INBOUND NEIGHBORS ======================================

DC=mmc,DC=mmcwm,DC=com
    Default-First-Site-Name\(old ops master w2K) via RPC
        DC object GUID: 25944c7a-efe5-4321-b2c4-6062bf41d6b7
        Last attempt @ 2010-01-19 13:27:56 was successful.
    Default-First-Site-Name\(secondary W2k dc) via RPC
        DC object GUID: d25285e6-c2f3-4971-acbf-d2289fb54733
        Last attempt @ 2010-01-19 13:28:03 was successful.
    Default-First-Site-Name\(secondary w2003 dc) via RPC
        DC object GUID: 41cfc51b-3bc9-4ace-95ed-2ad72e499990
        Last attempt @ 2010-01-19 13:29:34 was successful.

CN=Configuration,DC=mmc,DC=mmcwm,DC=com
    Default-First-Site-Name\*** via RPC
        DC object GUID: 41cfc51b-3bc9-4ace-95ed-2ad72e499990
        Last attempt @ 2010-01-19 13:11:29 was successful.
    Default-First-Site-Name\*** via RPC
        DC object GUID: 25944c7a-efe5-4321-b2c4-6062bf41d6b7
        Last attempt @ 2010-01-19 13:16:56 was successful.
    Default-First-Site-Name\*** via RPC
        DC object GUID: d25285e6-c2f3-4971-acbf-d2289fb54733
        Last attempt @ 2010-01-19 13:27:03 was successful.

CN=Schema,CN=Configuration,DC=mmc,DC=mmcwm,DC=com
    Default-First-Site-Name\*** via RPC
        DC object GUID: 41cfc51b-3bc9-4ace-95ed-2ad72e499990
        Last attempt @ 2010-01-19 12:51:19 was successful.
    Default-First-Site-Name\*** via RPC
        DC object GUID: d25285e6-c2f3-4971-acbf-d2289fb54733
        Last attempt @ 2010-01-19 12:51:19 was successful.
    Default-First-Site-Name\*** via RPC
        DC object GUID: 25944c7a-efe5-4321-b2c4-6062bf41d6b7
        Last attempt @ 2010-01-19 12:51:19 was successful.

DC=DomainDnsZones,DC=mmc,DC=mmcwm,DC=com
    Default-First-Site-Name\*** via RPC
        DC object GUID: 41cfc51b-3bc9-4ace-95ed-2ad72e499990
        Last attempt @ 2010-01-19 12:51:19 was successful.

DC=ForestDnsZones,DC=mmc,DC=mmcwm,DC=com
    Default-First-Site-Name\*** via RPC
        DC object GUID: 41cfc51b-3bc9-4ace-95ed-2ad72e499990
        Last attempt @ 2010-01-19 12:51:19 was successful.

dcdiag shows w2k3-dc passing all tests.







________________________________

Subject: RE: just who's in charge here (dom controller query)
Date: Tue, 19 Jan 2010 11:05:33 -0500
To: [email protected]
CC: 
From: [email protected]

What does replication look like in your environment? Run DCDIAG and
REPADMIN to get a health status for AD replication. 

 

 

Chris Bodnar, MCSE
Sr. Systems Engineer
Infrastructure Service Delivery
Distributed Systems Service Delivery - Intel Services
Guardian Life Insurance Company of America
Email: [email protected]
Phone: 610-807-6459
Fax: 610-807-6003

________________________________

From: [email protected] [mailto:[email protected]] 
Sent: Tuesday, January 19, 2010 10:53 AM
To: NT System Admin Issues
Subject: just who's in charge here (dom controller query)

 

When we upgraded Exchange to 2007, we had to install W2k3 dc's. Right
now we are in mixed mode as we have to keep a couple of the W2k DC's
running.  W2K3-DC (server) is the ops master and pdc emulator.
However, I have run into two situations where it seems the old W2K DC
(DC1) ops master seems to be causing problems.
Case 1: Windows time.  It appears most pc's are syncing their clocks to
DC1 instead of W2K3-DC.
Case 2: GPO's are not applying properly (note we don't have that many
and they only apply to specific computers). Usually the error on the pc
in question is that it can't contact a domain controllers to get the
policy.
I'm perplexed over this as I thought that whatever was the Ops Master
for the domain was the top-level controller (for want of a better
phrase).

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