| Author | Messages | |
jfigueroa
Posts:13
 | | 01/26/2006 7:34 AM |
| We are in the process of coming up with a 2nd Data Center for DR. I am
working on the AD part of it and I am trying to find out what the
process is for finding a DC in DC II of DC I is down.
I looked at some of the Domain Locator articles and it talks about how a
client finds a DC and what happens if the DC that it contacts is not in
its site, etc, etc. What I don't see is what happens if the DC I site is
down?... How could it find DC II, is that all part of the site cost?. It
has been a while and I am confused, is Site Costs used to find DCs or
just for replication?
Any articles or explanations are appreciated.
Thanks
Johnny Figueroa
Enterprise Network Consultant/Integrator
Network Services Banner Health Voice (602)
495-4195 Fax (602) 495-4406
WARNING: This message, and any attachments, are intended only for the
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| Gil
Posts:119
| | 01/26/2006 7:58 AM |
| If a client can't find a DC in its site, it will then try to find any DC
in its domain, regardless of site, based on the weights and priorities
associated with the DCs locator records in DNS. Site link cost doesn't
enter into the process.
However, NETLOGON does use site link cost to determine the covering DC
for a DC-less site.
-gil
-----Original Message-----
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Figueroa,
Johnny
Sent: Thursday, January 26, 2006 12:33 PM
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: [ActiveDir] DC II
We are in the process of coming up with a 2nd Data Center for DR. I am
working on the AD part of it and I am trying to find out what the
process is for finding a DC in DC II of DC I is down.
I looked at some of the Domain Locator articles and it talks about how a
client finds a DC and what happens if the DC that it contacts is not in
its site, etc, etc. What I don't see is what happens if the DC I site is
down?... How could it find DC II, is that all part of the site cost?. It
has been a while and I am confused, is Site Costs used to find DCs or
just for replication?
Any articles or explanations are appreciated.
Thanks
Johnny Figueroa
Enterprise Network Consultant/Integrator
Network Services Banner Health Voice (602)
495-4195 Fax (602) 495-4406
WARNING: This message, and any attachments, are intended only for the
use of the individual or entity to which it is addressed and may contain
information that is privileged, confidential and exempt from disclosure
under applicable law. If the reader of this message is not the intended
recipient or employee/agent responsible for delivering the message to
the intended recipient, you are hereby notified that any dissemination,
distribution or copying of the communication is strictly prohibited. If
you receive this communication in error, please notify us immediately
List info : http://www.activedir.org/List.aspx
List FAQ : http://www.activedir.org/ListFAQ.aspx
List archive:
http://www.mail-archive.com/activedir%40mail.activedir.org/
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| ZJORZ
Posts:133
| | 01/26/2006 8:02 AM |
| Clients and servers will always try to use a DC in their own site. The query for that will be:
_ldap._tcp.._sites.dc._msdcs..
In the case the DCs that registered that record (in the actual site or in another covering that site) are not available the client will query for a DC in the domain.The query for that will be:
_ldap._tcp.dc._msdcs..
Cheers,
Jorge
________________________________
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx on behalf of Figueroa, Johnny
Sent: Thu 2006-01-26 20:32
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: [ActiveDir] DC II
We are in the process of coming up with a 2nd Data Center for DR. I am
working on the AD part of it and I am trying to find out what the
process is for finding a DC in DC II of DC I is down.
I looked at some of the Domain Locator articles and it talks about how a
client finds a DC and what happens if the DC that it contacts is not in
its site, etc, etc. What I don't see is what happens if the DC I site is
down?... How could it find DC II, is that all part of the site cost?. It
has been a while and I am confused, is Site Costs used to find DCs or
just for replication?
Any articles or explanations are appreciated.
Thanks
Johnny Figueroa
Enterprise Network Consultant/Integrator
Network Services Banner Health Voice (602)
495-4195 Fax (602) 495-4406
WARNING: This message, and any attachments, are intended only for the
use of the individual or entity to which it is addressed and may contain
information that is privileged, confidential and exempt from disclosure
under applicable law. If the reader of this message is not the intended
recipient or employee/agent responsible for delivering the message to
the intended recipient, you are hereby notified that any dissemination,
distribution or copying of the communication is strictly prohibited. If
you receive this communication in error, please notify us immediately
List info : http://www.activedir.org/List.aspx
List FAQ : http://www.activedir.org/ListFAQ.aspx
List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender. Thank you.
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| jfigueroa
Posts:13
| | 01/26/2006 8:16 AM |
| Thank you all. It looks like I need to look at the weights and
priorities of the SRV records to go to DC I if available and DC II if DC
I is down.
-----Original Message-----
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Gil Kirkpatrick
Sent: Thursday, January 26, 2006 12:51
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: RE: [ActiveDir] DC II
If a client can't find a DC in its site, it will then try to find any DC
in its domain, regardless of site, based on the weights and priorities
associated with the DCs locator records in DNS. Site link cost doesn't
enter into the process.
However, NETLOGON does use site link cost to determine the covering DC
for a DC-less site.
-gil
-----Original Message-----
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Figueroa,
Johnny
Sent: Thursday, January 26, 2006 12:33 PM
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: [ActiveDir] DC II
We are in the process of coming up with a 2nd Data Center for DR. I am
working on the AD part of it and I am trying to find out what the
process is for finding a DC in DC II of DC I is down.
I looked at some of the Domain Locator articles and it talks about how a
client finds a DC and what happens if the DC that it contacts is not in
its site, etc, etc. What I don't see is what happens if the DC I site is
down?... How could it find DC II, is that all part of the site cost?. It
has been a while and I am confused, is Site Costs used to find DCs or
just for replication?
Any articles or explanations are appreciated.
Thanks
Johnny Figueroa
Enterprise Network Consultant/Integrator Network Services Banner Health
Voice (602)
495-4195 Fax (602) 495-4406
WARNING: This message, and any attachments, are intended only for the
use of the individual or entity to which it is addressed and may contain
information that is privileged, confidential and exempt from disclosure
under applicable law. If the reader of this message is not the intended
recipient or employee/agent responsible for delivering the message to
the intended recipient, you are hereby notified that any dissemination,
distribution or copying of the communication is strictly prohibited. If
you receive this communication in error, please notify us immediately
List info : http://www.activedir.org/List.aspx
List FAQ : http://www.activedir.org/ListFAQ.aspx
List archive:
http://www.mail-archive.com/activedir%40mail.activedir.org/
List info : http://www.activedir.org/List.aspx
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List archive:
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| GuidoG
Posts:63
| | 01/26/2006 9:00 AM |
| if you only have 2 datacenters and both represent a site, then you don't
have to worry about these special settings too much => the clients will
always preferr a DC in their site (DataCenter I), and if that's not
available, they'll switch to DCs in your other site (DataCenter II),
providing network connectivity exists.
If however you have multiple other sites (e.g. branchoffices), you will
want to start worrying about those priorities - typcially you'll want to
make _sure_ that the DCs in your DataCenter II are used, instead of some
other remote DC across a slow WAN in some branch-office...
Another useful option is to consider not registerting the generic domain
records for any of those DCs that are in branch-offices => this way,
you'll ensure that your DataCenter DCs will be used for failover (and
for intial DC location). This will also ensure a quicker failover, since
the list of DCs that's passed to the client when performing a generic
domain DC query is also much shorter (all DCs in the list will be pinged
by the client to check who responds first...). Check the Domain Locator
article to see which DNS mnemonics you want to disable from registering
on those branch office DCs (should be "DC" and "LDAP").
/Guido
-----Original Message-----
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Figueroa,
Johnny
Sent: Donnerstag, 26. Januar 2006 21:15
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: RE: [ActiveDir] DC II
Thank you all. It looks like I need to look at the weights and
priorities of the SRV records to go to DC I if available and DC II if DC
I is down.
-----Original Message-----
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Gil Kirkpatrick
Sent: Thursday, January 26, 2006 12:51
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: RE: [ActiveDir] DC II
If a client can't find a DC in its site, it will then try to find any DC
in its domain, regardless of site, based on the weights and priorities
associated with the DCs locator records in DNS. Site link cost doesn't
enter into the process.
However, NETLOGON does use site link cost to determine the covering DC
for a DC-less site.
-gil
-----Original Message-----
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Figueroa,
Johnny
Sent: Thursday, January 26, 2006 12:33 PM
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: [ActiveDir] DC II
We are in the process of coming up with a 2nd Data Center for DR. I am
working on the AD part of it and I am trying to find out what the
process is for finding a DC in DC II of DC I is down.
I looked at some of the Domain Locator articles and it talks about how a
client finds a DC and what happens if the DC that it contacts is not in
its site, etc, etc. What I don't see is what happens if the DC I site is
down?... How could it find DC II, is that all part of the site cost?. It
has been a while and I am confused, is Site Costs used to find DCs or
just for replication?
Any articles or explanations are appreciated.
Thanks
Johnny Figueroa
Enterprise Network Consultant/Integrator Network Services Banner Health
Voice (602)
495-4195 Fax (602) 495-4406
WARNING: This message, and any attachments, are intended only for the
use of the individual or entity to which it is addressed and may contain
information that is privileged, confidential and exempt from disclosure
under applicable law. If the reader of this message is not the intended
recipient or employee/agent responsible for delivering the message to
the intended recipient, you are hereby notified that any dissemination,
distribution or copying of the communication is strictly prohibited. If
you receive this communication in error, please notify us immediately
List info : http://www.activedir.org/List.aspx
List FAQ : http://www.activedir.org/ListFAQ.aspx
List archive:
http://www.mail-archive.com/activedir%40mail.activedir.org/
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| lists1
Posts:4
| | 01/27/2006 8:36 AM |
| AFAIK the clients will first contact the last DC which is stored in the
registry, this DC will verify their IP with the site-informations stored in
AD. He will reply the sites DCs to the client in the NetlogonEx-Packet, and
the client will try to contact one of these.
Note that the client may retrieve DCs not in his site depending on automatic
site coverage (after a DC was offline or newly joined, the site created
without an DC and the DC moved in there later and the informations not
cleaned up in DNS).
Just IMHO
Ulf
-----Original Message-----
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Almeida Pinto,
Jorge de
Sent: Thursday, January 26, 2006 8:50 PM
To: ActiveDir@xxxxxxxxxxxxxxxxxx; ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: RE: [ActiveDir] DC II
Clients and servers will always try to use a DC in their own site. The query
for that will be:
_ldap._tcp.._sites.dc._msdcs..
In the case the DCs that registered that record (in the actual site or in
another covering that site) are not available the client will query for a DC
in the domain.The query for that will be:
_ldap._tcp.dc._msdcs..
Cheers,
Jorge
________________________________
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx on behalf of Figueroa, Johnny
Sent: Thu 2006-01-26 20:32
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: [ActiveDir] DC II
We are in the process of coming up with a 2nd Data Center for DR. I am
working on the AD part of it and I am trying to find out what the process is
for finding a DC in DC II of DC I is down.
I looked at some of the Domain Locator articles and it talks about how a
client finds a DC and what happens if the DC that it contacts is not in its
site, etc, etc. What I don't see is what happens if the DC I site is
down?... How could it find DC II, is that all part of the site cost?. It has
been a while and I am confused, is Site Costs used to find DCs or just for
replication?
Any articles or explanations are appreciated.
Thanks
Johnny Figueroa
Enterprise Network Consultant/Integrator Network Services Banner Health
Voice (602)
495-4195 Fax (602) 495-4406
WARNING: This message, and any attachments, are intended only for the use of
the individual or entity to which it is addressed and may contain
information that is privileged, confidential and exempt from disclosure
under applicable law. If the reader of this message is not the intended
recipient or employee/agent responsible for delivering the message to the
intended recipient, you are hereby notified that any dissemination,
distribution or copying of the communication is strictly prohibited. If you
receive this communication in error, please notify us immediately
List info : http://www.activedir.org/List.aspx
List FAQ : http://www.activedir.org/ListFAQ.aspx
List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
This e-mail and any attachment is for authorised use by the intended
recipient(s) only. It may contain proprietary material, confidential
information and/or be subject to legal privilege. It should not be copied,
disclosed to, retained or used by, any other party. If you are not an
intended recipient then please promptly delete this e-mail and any
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