DIFFERENT SUBNET MASKS IN A SINGLE NETWORK SEGMENT

Discussion in 'Linux Networking' started by Damiano Fasoli, Jun 7, 2004.

  1. I have worked with the following configuration
    in a single network segment made up by UTP Cat 5 cables and HP autosensitive
    network switches.

    Some hosts, i.e. servers and many clients, have an address in the subnet
    10.0.0.0/16.
    For example server1 is 10.0.0.4, subnet mask 255.255.0.0, and client1 is
    10.0.10.111, subnet mask 255.255.0.0

    However there are some clients, i.e. superclients, inside the same network
    which use a different subnet mask; for example superclient1 is 10.0.0.199,
    subnet mask 255.255.255.0

    The reason of this choice is the will to "keep" superclients invisible to
    normal clients.
    For example server1 and client1 can ping each other since they're both in
    the 10.0.0.0/16 subnet
    Server1 and superclient1 can still ping each other (EVEN THOUGH THEY USE
    DIFFERENT SUBNET MASKS) since they're both in the 10.0.0.0/24 subnet.
    Superclient1 and client1 can't ping each other and this works as wanted.

    HOWEVER NETWORK SOMETIMES GOES DOWN FOR THREE OR FOUR MINUTES, FOR EXAMPLE
    SERVER1 AND CLIENT1 CAN'T PING NO MORE EACH OTHER FOR SUCH A WHILE.
    (In Win2k the cable is always connected as said by the windows icon)

    IS THERE ANYBODY WHO MAY HELP ME TO UNDERSTAND IF THIS DAMAGE IS DUE TO THE
    USE OF TWO DIFFERENT SUBNET MASKS IN THE SAME NETWORK SEGMENT, OR THERE ARE
    MORE BASIC PROBLEMS?

    Servers and Win Server 2003, clients Win2K and superclients WinXP pro.

    Any help should be very appreciated...

    Best regards
    Damiano
     
    Damiano Fasoli, Jun 7, 2004
    #1
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  2. Damiano Fasoli

    Tauno Voipio Guest

    1. Sick headers in the message, wrong follow-up address.

    2. Not a single Linux host in network: off-topic.

    3. Get a good book, e.g.

    W. Richard Stevens, TCP/IP Illustrated

    and learn.

    Tauno Voipio
    tauno voipio @ iki fi
     
    Tauno Voipio, Jun 8, 2004
    #2
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