Roger, Yeah - it will, through sorting through the subnets available - end up grabbing the most specific subnet that the client is on. So, if you have a /25 and a /24 (real-life - from our environment) the client being on the /24, the eventual selection of subnet and site associated will be to the most specific.
Rick Kingslan MCSE, MCSA, MCT Microsoft MVP - Active Directory Associate Expert Expert Zone - www.microsoft.com/windowsxp/expertzone -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roger Seielstad Sent: Friday, August 29, 2003 10:07 AM To: '[EMAIL PROTECTED]' Subject: RE: [ActiveDir] overlapping IP space in AD sites? You answered my question - I apparently left out 'impact' from the original statement. I guess at some point I figured that there would be a performance hit for trying to ascertain the most specific subnet. It does grab the most specific subnet, right? -------------------------------------------------------------- Roger D. Seielstad - MTS MCSE MS-MVP Sr. Systems Administrator Inovis Inc. > -----Original Message----- > From: Joe [mailto:[EMAIL PROTECTED] > Sent: Thursday, August 28, 2003 11:17 PM > To: [EMAIL PROTECTED] > Subject: RE: [ActiveDir] overlapping IP space in AD sites? > > > I don't think I understand your question Roger... I will give it a try > anyway... > > I haven't noticed a performance impact due to having the additional > subnets if that is what you are asking. Then I wouldn't really expect > it since it should be implemented as a simple btree search. > > The main reason I did it years ago was because contrary to > documentation new DC's that were promoed that weren't on a defined > subnet DID NOT go into Default First Site. They would go into some > other site defined by some logic that I failed to ascertain which was > a pain since we have several hundred sites. > > Additionally when we have clients come up on undefined subnets we > would rather they get directed to our corporate datacenters versus > randomly picking some site somewhere. This makes sense since we are > basically three interconnected geographic hub and spokes networks with > the interconnections between the hubs. The way the data center and the > sorting sites (sites with the class-a's) and site links are defined > the sorting sites end up using the data centers for DC coverage. It > works out well. We, of course, would rather have all of the subnets > and sites defined properly, but we understand reality and know it > won't happen so we try to reduce pain felt by unsuspecting users by > crutching as best as possible. > > > joe > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Roger > Seielstad > Sent: Thursday, August 28, 2003 7:09 AM > To: '[EMAIL PROTECTED]' > Subject: RE: [ActiveDir] overlapping IP space in AD sites? > > > Is there any significant performance that you can discern from that > scheme? > > -------------------------------------------------------------- > Roger D. Seielstad - MTS MCSE MS-MVP > Sr. Systems Administrator > Inovis Inc. > > > > -----Original Message----- > > From: Joe [mailto:[EMAIL PROTECTED] > > Sent: Wednesday, August 27, 2003 6:37 PM > > To: [EMAIL PROTECTED] > > Subject: RE: [ActiveDir] overlapping IP space in AD sites? > > > > > > This is fine. We actually have a couple of class A subnets > defined and > > > the subdefine those to more specific sites. > > > > I.E. Class A points to an overall company site. Many 24 bit > mask or 23 > > > bit mask subnets are then defined to further refine the site the > > clients should use. The clients will chase through the > logic and find > > the subnet > > that most closely matches it and use that site. > > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Thommes, > > Michael M. > > Sent: Wednesday, August 27, 2003 11:10 AM > > To: Active Directory Mailing List (E-mail) > > Subject: [ActiveDir] overlapping IP space in AD sites? > > > > > > Hi, > > We have a pretty complex IP structure with various types > of access. > > > As we develop AD sites for low bandwidth connected remote > offices, I > > was wondering how AD handles site subnet definitions that might > > overlap one another. For example: > > > > 10.10.0.0/16 = Site 1 > > 10.10.88.0/25 = Site 2 > > > > The AD Sites and Services mmc allows (doesn't complain) about > > overlapping subnets. As always, any comments or > experiences in this > > area are appreciated! > > > > Mike Thommes > > Argonne National Laboratory > > List info : http://www.activedir.org/mail_list.htm > > List FAQ : http://www.activedir.org/list_faq.htm > > List archive: > > http://www.mail-archive.com/activedir%40mail.activedir.org/ > > > > List info : http://www.activedir.org/mail_list.htm > > List FAQ : http://www.activedir.org/list_faq.htm > > List archive: > > http://www.mail-archive.com/activedir%> 40mail.activedir.org/ > > > List info : http://www.activedir.org/mail_list.htm > List FAQ : http://www.activedir.org/list_faq.htm > List archive: > http://www.mail-archive.com/activedir%40mail.activedir.org/ > > List info : http://www.activedir.org/mail_list.htm > List FAQ : http://www.activedir.org/list_faq.htm > List archive: > http://www.mail-archive.com/activedir%> 40mail.activedir.org/ > List info : http://www.activedir.org/mail_list.htm List FAQ : http://www.activedir.org/list_faq.htm List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ List info : http://www.activedir.org/mail_list.htm List FAQ : http://www.activedir.org/list_faq.htm List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
