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Duplicate IP address

Discussion in 'Networks' started by Boycie, Jul 19, 2006.

  1. Boycie
    Honorary Member

    Boycie Senior Beer Tester

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    In the unlikely event that 2 clients receive the same address from a DHCP server, what would you see in the TCP/IP configuration on both adapters?

    Si
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  2. simongrahamuk
    Honorary Member

    simongrahamuk Hmmmmmmm?

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    You should see the same thing on both PC's. At least I think you should? :blink
     
  3. Boycie
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    Boycie Senior Beer Tester

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    that is what i thought, but i just came accross a test question that stated the mask would be 0.0.0.0 on the client that could not connect... :blink

    Si
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  4. zimbo
    Honorary Member

    zimbo Petabyte Poster

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    that makes sense... 0.0.0.0 would come on if it doesnt get an IP address or an error like this case duplicate IP's
     
    Certifications: B.Sc, MCDST & MCSA
    WIP: M.Sc - Computer Forensics
  5. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    This depends on the OSes involved. AFAIK no decent DHCP server could do this, but I'm sure this has probably happened! I would expect ARP to whinge (well - it does on FreeBSD). Other than that the two machines I would expect to show the normal IP and mask. They would have major problems communicating though.

    I would need to look at the DHCP protocol to see if it has any method of digging itself out of such a hole.

    What I *have* seen fairly often is where someone sets a static on a machine not realizing that it is in the middle of a DHCP range. Again, I got a complaint from ARP on a FreeBSD box.

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
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  6. Boycie
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    Boycie Senior Beer Tester

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    thanks for the input, guys :thumbleft

    Si
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  7. Bluerinse
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    Bluerinse Exabyte Poster

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    This is true on Windows boxes with duplicate IP addys :rolleyes:
     
    Certifications: C&G Electronics - MCSA (W2K) MCSE (W2K)

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