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Windows server 2003 periodically loses network connectivity

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  • Windows server 2003 periodically loses network connectivity

    I have a vanilla server with only a few apps installed on it. Every day or so, it loses connection to the rest of the internal network. I've found that I have to disable then re-enable the Local Area Network Connection. The connection would then stay up for 5 min, 1 hour or even a day or so before I have to repeat the whole procedure.

    Anyone know what the problem could be and the possible solution?

    Windows 2003 Server SP2
    |
    +-- JDMils
    |
    +-- Regional Systems Engineer, DotNet programmer & Jack of all trades
    |

  • #2
    Re: Windows server 2003 periodically loses network connectivity

    Have you tried replacing the NIC...........?

    Regards,
    Kapil Sharma
    ~~~~~~~~~~~~~
    Life is too short, Enjoy It.

    Comment


    • #3
      Re: Windows server 2003 periodically loses network connectivity

      As above try a new NIC and see if the problems keep occuring.

      An alternative would be to update the drivers and firmware of the network card, set to Full instead of Auto with regards to your duplex settings and change the network cable.

      Also if your switch has any form of port diagnostics you could check that for clues.

      Comment


      • #4
        Re: Windows server 2003 periodically loses network connectivity

        I haven't switched the NICs yet as the server can't come down yet, but I have found that when I run "ipconfig /registerdns", I get the error:
        Event Type: Warning
        Event Source: DnsApi
        Event Category: None
        Event ID: 11165
        Date: 19/01/2008
        Time: 10:48:37 AM
        User: N/A
        Computer: SQLSERVER
        Description:
        The system failed to register host (A) resource records (RRs) for network adapter
        with settings:

        Adapter Name : {0AD09408-B3C3-45CE-BD59-D01FAD7DC13C}
        Host Name : sqlserver
        Primary Domain Suffix : jdmils.com
        DNS server list :
        192.168.100.1
        Sent update to server : <?>
        IP Address(es) :
        192.168.100.6

        The reason the system could not register these RRs was because the DNS server contacted refused the update request. The reasons for this might be (a) you are not allowed to update the specified DNS domain name, or (b) because the DNS server authoritative for this name does not support the DNS dynamic update protocol.

        To register the DNS host (A) resource records using the specific DNS domain name and IP addresses for this adapter, contact your DNS server or network systems administrator.

        For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
        Data:
        0000: 2a 23 00 00 *#..
        Seems to indicate a problem with a DHCP client but the server has a fixed IP.Here's the details:
        C:\>ipconfig /all

        Windows IP Configuration

        Host Name . . . . . . . . . . . . : sqlserver
        Primary Dns Suffix . . . . . . . : jdmils.com
        Node Type . . . . . . . . . . . . : Unknown
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : jdmils.com

        Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix . :
        Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connection
        Physical Address. . . . . . . . . : 00-0D-61-32-0A-E4
        DHCP Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . : 192.168.100.6
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.100.1
        DNS Servers . . . . . . . . . . . : 192.168.100.1

        C:\>
        Oh, this server was a DC but was demoted to a member server then taken out of the domain and put into a seperate workgroup.
        |
        +-- JDMils
        |
        +-- Regional Systems Engineer, DotNet programmer & Jack of all trades
        |

        Comment


        • #5
          Re: Windows server 2003 periodically loses network connectivity

          Even if a machine has static IP but the DHCP client service must be running on it as it's required to register DNS entries.

          If it's already started then it might be some configuration issue. Let us know if the status as I will upload the relevent doc if the service is running.

          Regards,
          Kapil Sharma
          ~~~~~~~~~~~~~
          Life is too short, Enjoy It.

          Comment


          • #6
            Re: Windows server 2003 periodically loses network connectivity

            Hi,

            Here's my 2 cents worth:

            1. Your DNS server address looks like its the same as your gateway address. Is that correct?

            2. Check to see if the DNS zone supports dynamic updates (in zone properties). I assume it is, if no other computers are experiencing this issue. If DNS is AD-integrated and allows Secure Updates only, then there may be a problem with the ownership of this computer's A record.

            3. When the computer loses connectivity - run Ipconfig and see what the address is then, as well as the other info.

            Hope that helps somehow,

            -Michael

            Comment


            • #7
              Re: Windows server 2003 periodically loses network connectivity

              Hey, sorry for the late reply. I replaced the on-board NIC with a PCI NIC and I still get the same problem.

              Seems to be that the OS's is somehow screwed. Is there anyway to reset the OS NIC-related modules? I remember I had a similar problem ages ago where an XP machine would lose network connectivity and it had something to do with stacks or similar. I remember downloading a custom patch which someone had written which reset all the OS parameters and it fixed it!

              Oh, the server is at home connected to a Netgear ADSL WiFi ADSL router. No AD. Thanks.
              |
              +-- JDMils
              |
              +-- Regional Systems Engineer, DotNet programmer & Jack of all trades
              |

              Comment


              • #8
                Re: Windows server 2003 periodically loses network connectivity

                You can repair the TCP/IP stack and Winsock that i can remember at the moment.

                How to repair Winsock2

                Hot to repair the TCP/IP Stack Server 2003

                Comment


                • #9
                  Re: Windows server 2003 periodically loses network connectivity

                  Please reinstall the network driver and see....

                  If this doesnt work change the NIC... If you will not get a downtime, please use the temperory solution as below..


                  For a temperory solution please create a bat and put in schedule task so that the bat file can run in every 1 minute and repair the network. Please use the below to create the bat file

                  ipconfig /renew
                  arp -d
                  nbtstat -r
                  nbtstat -rr
                  ipconfig /flushdns
                  ipconfig /registerDNS

                  Copt this to a notepad and save as .bat

                  Thanks
                  Rajiesh
                  HSEIJAR

                  Comment

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