After SP2 Update I have hundreds of IP already exists errors

Discussion in 'Server Networking' started by Thomas, Mar 19, 2007.

  1. Thomas

    Thomas Guest

    I upgraded both of my Windows 2003 servers over the weekend to SP2, only one
    of which is a DHCP server, but all day today I kept geeting users with the IP
    address already exists on the network error message with limited or sporadic
    connectivity. I rebooted, stopped and started DHCP server services, etc but
    kept on geeting them. In the Leases list there were many with BAD_ADDRESS
    listed as the machine name. I can delete them, but after a while they come
    back along with users getting these messages. ANyone with any ideas of what
    happened to DHCP with the new "update". Seems like with every "update" it is
    really just another introduction of problems. Anyone else with this problem
    and/or know what to do to fix it?
     
    Thomas, Mar 19, 2007
    #1
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  2. Thomas

    Thomas Guest

    *bump*
    Has anyone else experienced this? We are still having problems with multiple
    IP's and BAD_ADDRESSes in the DHCP lease list. I have shut-down every
    computer on the entire campus, deleted all leases in the server list,
    rebooted servers, rebooted all computers etc. This all started with the SP2
    update on Sunday. Anyone even have any vague ideas of what to check next?
     
    Thomas, Mar 22, 2007
    #2
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  3. This generally happens when there are some clients in the network that have
    static addresses configured and which coincide with the scopes set on the
    DHCP Server. Could this possibly be the problem?

    --
    Chris Keroack

    Release Program Manager
    Windows Sustainability
    Microsoft Corporation
     
    Chris Keroack \(MS\), Mar 28, 2007
    #3
  4. Thomas

    Thomas Guest

    Hey Chris. There are no 10.x.x.x addresses set as static in our network. We
    do have some 170.211.153.x machines, of which 170.211.153.2 is the DHCP
    server that hands out the 10.x addresses. It is the 10.x addresses however
    that are constantly getting errors and logging "BAD_ADDRESS" in the DHCP
    lease list. We never had a single DHCP issue for 4 years now until this
    update last weekend, and all week last week it was a nightmare. This week we
    are on spring break so no-one is at school, but I figure next week it will be
    bad again. I have gone through step by step the original setup and everything
    looks fine. I guess I am going to have to totally reformat the DHCP server
    and reinstall Server 2003 and just not do the SP2 update. I hate it when MS
    does this without fully testing their releases, and then wants a couple
    hundred dollars just for me to call and ask them what's up. Any other ideas?
    Thanks again for the reply!
    Thomas
     
    Thomas, Mar 28, 2007
    #4
  5. Thomas

    Thomas Guest

    (ps Chris, I really wasn't talking about you per se in the MS comment as I
    know you do not control the policies, but I tried calling them last week
    about the issue and they refused to even talk to me without a credit card
    number even after I explained that all I did was run Windows Update and it
    happened after that).
     
    Thomas, Mar 29, 2007
    #5
  6. Before you blow away and reinstall your server, let me check on a couple
    things here and post mid-day (PST) tomorrow.

    --
    Chris Keroack

    Release Program Manager
    Windows Sustainability
    Microsoft Corporation
     
    Chris Keroack \(MS\), Mar 29, 2007
    #6
  7. Thomas

    Thomas Guest

    Cool. Thanks. If you really wanted to take a look at the server itself and
    see if you saw anything I am missing in the configuration, I could give you
    an admin password so you could remote desktop into it. At this point I don't
    see where it would hurt anything at all. It is a public school server running
    DHCP and file storage - nothing secretive or private records or anything. If
    you decide you want to look, just email me with your email address and I can
    send it to you that way. Thanks.
    Thomas
     
    Thomas, Mar 29, 2007
    #7
  8. Thomas

    Thomas Guest

    Also, Chris, I had forgotten that on Thursday or Friday two teachers who have
    been bringing their home laptops to school and connecting them to the network
    all year without trouble could not get on the network any more after the DHCP
    server was updated. I looked at both laptops using ipconfig and neither could
    get an IP address from DHCP - both said they could not find a dhcp server or
    some message like that. Both laptops were using DHCP and worked fine before
    the upgrade to SP2. I gave them static IP addresses and they worked fine, but
    when I switched back to DHCP they would not. Both laptops were using XP Home
    edition. We do not have XP Home on any of the other 200+ computers on campus
    (mosttly XP Professional, some 2K, and a handful of 98SE. All of the campus
    computers do manage to get IP addresses, but repeatedly throughout the day
    they give the ip conflict error and either totally drop offf the network
    altogether or might start working again on their own. I have had to restart
    the DHCP service on the DHCP server a few times to get them working again,
    but nothing I did would work with the 2 XP Home computers.
     
    Thomas, Mar 29, 2007
    #8
  9. Actually, network captures could be really useful. It would at least
    ascertain where the BAD_ADDRESS is coming from.

    If we can have the DHCP Server leases cleared, and then have a network
    capture till the time we get the BAD_ADDRESS, I can pass that along.

    --
    Chris Keroack

    Release Program Manager
    Windows Sustainability
    Microsoft Corporation
     
    Chris Keroack \(MS\), Mar 29, 2007
    #9
  10. Thomas

    Thomas Guest

    We do not go back to school until Monday, but I will clear the leases before
    then. What do I need to do to setup the network capture? I would imagine by
    8:30 monday morning there will be a slew of BAD_ADDRESS'es since that will be
    when all labs and teachers will be starting up their computers. Let me know
    what to do catch what you need and I'll be happy to do it.
    Thomas
     
    Thomas, Mar 29, 2007
    #10
  11. Chris Keroack \(MS\), Mar 30, 2007
    #11
  12. Thomas

    Thomas Guest

    Well, today we had a state field tech come to the school as I never could
    figure it out. He said other schools have also had this issue in the past
    couple weeks so he was aware of the problem already. It must be a valid
    problem that MS needs to address sicne it isn't just isolated to us. From
    their viewpoint, they believe it to be a corrupted access database or
    database index , since that is the underlying structure where the IP tables
    are stored. He said the only way they have found to fix the problem is to
    totally delete the private ip scope from the DHCP server, then also delete
    the files in the DHCP subfolder from the system drive, then add the scope
    back as a new scope. Of course if you have any reserved addresses you need to
    write all that down as you will have to re-enter it. Luckily we had no
    reservations so we had the whole campus powerdown all their computers, we
    blasted the scope and the folder, then added it all back. You have to make
    sure that every single nat ip using computer is powered off, otherwise you
    will keep getting IP conflicts because those machines will not be in the
    newly created tables. We had a couple machines on campus (copiers and one pc)
    that were logging bad_address errors again after adding the scope back, but
    we found them and rebooted them which fixed the problem. Maybe Chris can pass
    this on to the release people and have it checked out. Thanks
    Thomas
     
    Thomas, Apr 4, 2007
    #12
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