Changing subnet mark on a Windows Server 2003 RRS feed

  • Question

  • I have installed Windows server 2003 R2 Standard edition on my IBM server. During installation I have set up subnet mask as The serve has a fix IP no. and it is not used as DHCP server. Everything is wokring fine. I am able to ping to other computers in the network.
    Now I want to change the subnet mask to
    I changed it in local area network connection property and rebooted the server.
    My problem is that after changing the subnet mask i am not able to access any other computer in my network. Also no other computer can access this server.

    Can anybody tell me how to fix this problem?
    Thursday, August 27, 2009 4:43 PM


  • Hi,

    It's hard to tell you what the problem is without knowing the IP addresses you are pinging to and from. 

    Two computers with IP addresses of and that are connected on the same segment should be able to ping each other even if one has a class C netmask and the other has a class B netmask.

    You can try looking at the routing table (route print) on the clients or on the server.

    Friday, August 28, 2009 6:54 AM