The format of the specified network name is invalid

Discussion in 'Windows Small Business Server' started by youthful-itpro, Feb 1, 2006.

  1. I get the following error in IIS 'the format of the specified network name is
    invalid'. Also, I cannot access the Internet through the server nor can
    clients, DHCP no longer works nor does DNS. It occurred when I replaced the
    motherboard with an identical version due to the old one failing. I can no
    longer connect to it remotely either. The only thing its doing is receiving
    emails, but I can't get them!

    I'm using SBS Premium SP1, all patched, Googling and MSFT KB's seem little
    use for this issue.
    youthful-itpro, Feb 1, 2006
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  2. Hmm . . . perhaps your internal nic is onboard? In that case, replacing
    the motherboard would also result in replacing the nic, which would result
    in a different MAC address, and different GUID in the registry . . . DNS,
    DHCP, etc. could still be bound to the old onboard nic which is no longer in
    the system - and that would naturally pose a problem :^)

    So - try re-running the CEICW . . . if that is the case, you'll probably
    get an error message about DHCP and unable to continue. In that case - do

    Open regedit and navigate to:
    to identify the GUID of your internal nic. Then check the following
    registry keys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SmallBusinessServer\ Value Name:

    Value Name: Last_1st_Nic_Guid

    If either of these last two keys don't have the GUID of your internal nic,
    replace them with the correct GUID, then close the registry editor and run
    the CEICW again.


    Chad A. Gross [SBS-MVP]
    Chad A. Gross [SBS-MVP], Feb 2, 2006
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  3. youthful-itpro

    Gregg Hill Guest


    If that is the case, then what happens when a NIC fails, even if it is an
    add-in card? Does the OS puke just because the MAC changed?

    I think that is what a friend had happen WAY back on an NT4 server when the
    NIC stopped working. He replaced the NIC, then could not get into the OS. He
    and another friend spent five hours on it before calling me. I was freshly
    studying for my NT4 MCSE, and I had just read about the domain being tied to
    the NIC. He put the faulty NIC back in and installed a new one in another
    slot, and he was able to log into the server, apparently because it could
    still read the faulty NIC's MAC address. I think he may have left that NIC
    in the darn thing!

    Very strange!

    Gregg Hill

    Gregg Hill, Feb 2, 2006
  4. It was the NIC which I use for the Internet which failed, but I may have
    moved the internal NIC when I moved it in the motherboard.

    youthful-itpro, Feb 2, 2006
  5. I tried those methods too and it hasnt made a difference. The Internal NIC
    has the right GUID. Any advice?

    youthful-itpro, Feb 2, 2006
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