SBS2008 Server's looses network connection

Discussion in 'Server Networking' started by Raz, Dec 14, 2009.

  1. Raz

    Raz Guest

    Hi All,
    I am having a problem with my mail server that I cannot figure out why. The
    server runs fine for a few days and then all of a sudden I cannot access to
    the server via the network (local or external). When i restart the server, it
    seems to sort itself out for awhile and then this will happen again. All
    hardware is fine, I have tested everything. Any insight to this would be
    grately appreciated.
     
    Raz, Dec 14, 2009
    #1
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  2. We need more information to help. Any errors in the Event Viewer? Or posting
    the result of ipconfig /all may help.

    --
    Bob Lin, Microsoft-MVP, MCSE & CNE
    Networking, Internet, Routing, VPN Troubleshooting on
    http://www.ChicagoTech.net
    How to Setup Windows, Network, VPN & Remote Access on
    http://www.HowToNetworking.com
     
    Bob Lin \(MS-MVP\), Dec 14, 2009
    #2
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  3. Raz

    Raz Guest

    There arent' any errors in the Event Viewer, but i do find it strange that
    absolutely nothing gets logged when the server looses the network
    connectivity. here is the ipconfig / all

    Ethernet adapter Local Area Connection 2:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Intel(R) 82574L Gigabit Network
    Connectio
    n
    Physical Address. . . . . . . . . : 00-15-17-B1-2F-65
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Ethernet adapter Local Area Connection:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Intel(R) 82567LM-2 Gigabit Network
    Connec
    tion
    Physical Address. . . . . . . . . : 00-15-17-B1-2F-64
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::1841:2f25:fcdf:90%10(Preferred)
    Link-local IPv6 Address . . . . . : fe80::b284:cba5:b4d:a3cc%10(Preferred)
    IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . : 192.168.1.1
    DHCPv6 IAID . . . . . . . . . . . : 218109207
    DHCPv6 Client DUID. . . . . . . . :
    00-01-00-01-11-FB-86-FC-00-15-17-B1-2F-64

    DNS Servers . . . . . . . . . . . : fe80::b284:cba5:b4d:a3cc%10
    216.146.35.35
    216.146.36.36
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Tunnel adapter Local Area Connection* 8:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . :
    isatap.{3D668BB5-62BF-4872-9EA2-3E6BA83BA
    7AD}
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter Local Area Connection* 9:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . :
    isatap.{C4EBF737-188A-466F-9956-F48B2603E
    7C7}
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
     
    Raz, Dec 15, 2009
    #3
  4. The DNS could be the problem. It is recommended to use internal DNS instead
    of ISP DNS. Also disable IPv6 for a test. Please post back with the result.

    --
    Bob Lin, Microsoft-MVP, MCSE & CNE
    Networking, Internet, Routing, VPN Troubleshooting on
    http://www.ChicagoTech.net
    How to Setup Windows, Network, VPN & Remote Access on
    http://www.HowToNetworking.com
     
    Bob Lin \(MS-MVP\), Dec 15, 2009
    #4
  5. Raz

    Raz Guest

    Hi Bob,
    yea I changed that today and ran the Fix my network app in the SBS Console.
    The DNS and DNS reverse lookup were corrupt so it reinitialized that. I found
    that when i disable my IPv6 my exchange doesn't work at all. Thanks for the
    help will let you know if the dns fix sorted everything out.
     
    Raz, Dec 15, 2009
    #5
  6. Bob Lin \(MS-MVP\), Dec 15, 2009
    #6
  7. Raz

    Raz Guest

    Hi Bob, ok i will try disable the IPv6 as soon as the server comes back on
    because what i did, did not fix it, its now happened twice in one day.
     
    Raz, Dec 16, 2009
    #7
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