But it sounds like that redundancy isn't working for Ben. PCs seem to quit after not being able to get an address from the full primary server. Joe Heaton
________________________________ From: Sherry Abercrombie [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 19, 2008 9:32 AM To: NT System Admin Issues Subject: Re: DHCP understanding Redundancy. I have DHCP setup on my DC's in an identical setup. If one goes down, users can still authenticate and workstations can still get an IP address. On Feb 19, 2008 10:45 AM, Joe Heaton <[EMAIL PROTECTED]> wrote: Why the 2 separate DHCP servers, if there's so few clients? Why not just have one, with a scope that uses all the addresses? Or even a second scope on the one server, if you want to maintain those separately? Joe Heaton ________________________________ From: Benjamin Zachary [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 19, 2008 8:38 AM To: NT System Admin Issues Subject: RE: DHCP understanding Single subnet, only about 80 computers, one 'core' gig switch that all servers are connected to and yes its authorized. Like I said there are a handful of computers that have been on the 2nd dhcp for sometime, but I think this is from their migration a couple of weeks ago and of course once a device 'checks in' it will stay on that server as long as its responding. ________________________________ From: Damien Solodow [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 19, 2008 10:38 AM To: NT System Admin Issues Subject: RE: DHCP understanding The main question is are the requests getting to the second dhcp server? Is it on a different subnet? If it's a windows dhcp server, is it authorized in AD? From: Benjamin Zachary [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 19, 2008 10:34 AM To: NT System Admin Issues Subject: DHCP understanding I have a client that has 2 dhcp servers in his AD. Both work to some extent, a few users are on the 2nd dhcp server, I think occurred during their migration, but most of the users are on the primary dhcp server. Each dhcp server has its own scope 50-100 and 101-150 for example. His primary is full, all 50 ips are in use, and new computers coming onto the network are not getting an IP. I understood dhcp to be along the lines of a negative response is still a response (like dns) whereas the client broadcasts out server1 responds and says I have no IP's and the box says ok Im done I don't get an IP. Their consultant is arguing this is not the case by the fact that 5 or 6 computers are on the 2nd dhcp server, even though 20 other computers are not receiving dhcp requests. I tried to get into the 'call home' function of dhcp and once your on the server you would remain there etc etc but this is more of a friend thing so Im trying not to just tell the guy he is flat wrong until Im more sure. -- Sherry Abercrombie "Any sufficiently advanced technology is indistinguishable from magic." Arthur C. Clarke ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~
