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Thread: Useful information on Subnet Setup

  1. #1
    Join Date
    May 2009
    Posts
    245

    Useful information on Subnet Setup

    Subnet setup is a bit hectic jobs where you need a much intense knowledge on networking. Subnets makes your work much easier when you are working on a very wide network. Imagine a huge network like the Internet where each machine would have to know all the million other machines (including their addresses) and how to access them. This would force our poor computers have huge tables containing all the information. To address this issue, it was this huge network segmented into various smaller networks.

    And it is in these small networks that are given addresses to the machines to send them information. Thus, it suffices to know the network address to send information to a machine for it, and it is within this network that the information will be redirected to the right machine. When you configure a network, often referred to as subnet mask. This one used to capacity for a computer to communicate with one another within the same network or not. Depending on the mask, access restrictions are applied, and computers can not communicate, so you cannot find the same in My Network Places. The subnet mask is the most common one we use at home usually is 255.255.255.0.

    This subnet mask will allow computers with an IP address with the same first 3 octets to communicate. Ex: The computer has the IP 192.168.0.1 can communicate with each other with IP as 192.168.0.2 but not 192.169.0.2.As you understand, we have two addresses to identify a machine, one for the network and the machine itself. However, addressing that was chosen for machinery defines only a single address. You tell me that this is not enough.

    Simply address this segment into two distinct parts, one for the network, and one for the machine. This is where the mask comes into play, he plays the role of separator between these two addresses. The mask is a separator between the network part and host part of an IP address. The use and control of masks must be able to allow one hand to know what you handle, and secondly to optimize the operation of your network. Indeed, the use of masks will allow you to segment the most correct addressing of your network, and so sensitive machines separate from the rest of the network, reduce congestion, and predict the evolution of your network, etc.

    How to configure Subnet

    The following is an overview of the steps which will then be explained in detail:
    • establish the physical connectivity (network wiring, network interconnections - such as routers)
    • choose the size of each sub-network in terms of number of devices that are connected - ie how many IP numbers are required for each segment.
    • calculate masks and addresses of appropriate network
    • Give each interface on each network its own IP address and subnet mask appropriate.
    • Set up the routes on the routers and the appropriate gateways, routes and / or default routes on devices in the network.
    • test the system, resolve problems, etc.


    For purposes of this example, we assume we are cutting a number of Class C network: 192.168.1.0 . This provides for a maximum of 254 connected interfaces (hosts), plus

    the obligatory network number (192.168.1.0) and broadcast (192.168.1.255).

  2. #2
    Join Date
    May 2008
    Posts
    945

    Re: Useful information on Subnet Setup

    You need to install the correct cabling infrastructure for all the devices you want to interconnect designed to meet your physical layout. Each network uses two IP addresses that are no longer available for host addresses (hosts) - the IP network number itself, and the broadcast address on that network. When you cut into subnets, each subnet needs its own network address and broadcast - and they must be valid addresses within the range provided by the IP network as you cut.

  3. #3
    Join Date
    Nov 2009
    Posts
    955

    Re: Useful information on Subnet Setup

    There is also a lot of things need to decide the size of the subnet. It is a compromise between the number of sub networks you create and the number of IP numbers lost. Each network uses two IP addresses that are no longer available for host addresses (hosts) - the IP network number itself, and the broadcast address on that network. When you cut into subnets, each subnet needs its own network address and broadcast - and they must be valid addresses within the range provided by the IP network as you cut.

  4. #4
    herlinoah Guest

    Re: Useful information on Subnet Setup

    There is a important features of organizing networking, many organizations choose to divide one network into several subnets, Subnetworking is to divide the several local networks to a single network.

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