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October 15th, 2003, 01:34 PM

Sinch

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Join Date: Mar 2003

Location: England, UK

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Subnets

Hey,
I am relatively new to subnets and anything to do with them.
So to help me understand them better I started to create small network diagrams. Here’s one which I made to help me with subneting a C class network, however I'm unsure of whether it would work in practise or not. So could somebody who has knowledge on subnets review this diagram and tell me if it would work? and if so is there any other way of doing it?

Code:

                                         [ internet ]
                                               |
                                               |
                                               |
                                        _______|_____
                                       [             ]
                                       [    Router   ] Network:     200.27.9.0
                                       [  200.27.9.1 ] Subnet Mask: 255.255.255.192
                                       [_____________]
                                               |
                                               |
                                          _____|_____
                                         [           ]
                                         [  Switch   ]
                                         [___________]
                                         /     |     \
                                        /      |      \
                                       /       |       \
                         _____________/        |        \_____________
                        [             ]        |        [             ]
                        [    Router   ]        |        [    Router   ]
                        [ 200.27.9.64 ]        |        [ 200.27.9.192]
                        [_____________]        |        [_____________]
                        /                      |                      \
                       /                _______|_____                  \
                      /                [             ]                  \
                _____/_____            [    Router   ]              _____\_____
               [           ]           [ 200.27.9.128]             [           ]
               [  Switch   ]           [_____________]             [   Switch  ]
               [___________]                   |                   [___________]
                /                              |                              \
               /                        _______|_____                          \
              /                        [             ]                          \
       [200.27.9.65-95]                [    Switch   ]                 [200.27.9.193-58]
             Nodes                     [_____________]                        Nodes
                                              |                         
                                              |
                                              |
                                     [200.27.9.129-159]
                                            Nodes

I would be very grateful to anybody who takes the time to review this,
Many Thanks.

October 15th, 2003, 04:17 PM

ThePopp

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Join Date: Sep 2003

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For the most part this is an acceptable subnetting scheme. One problem though, your first usable subnet would be .64 with the /26 mask. This would not allow any traffic to get to the first router (.1). If you change the first router subnet mask to /24 then traffic could be aggregated and routed in the appropriate directions. Which is what subnetting is usually done to accomplish.

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