[quim]

On my CISCO 1 class I am given an assignment to scheme a network.
I am supposing to subnet and then assign the IP to each device that uses TCP/IP.
I am having trouble subnetting, so some help would be really appreciated.
This is not the actual problem ( I just made this up, so if I understand how to do this I will easily do my actual assignment):
Let’s say we are given a Class B network address: 131.40.0.0/16
Here is the problem:
Decide how you want to subnet the network knowing the following facts:
1- 6 Building in 6 states
2- Each Building needs 10 IP.
3- Each building has 50 local establishment
4- Each local establishment has 10 cashier ( 10 IP)

Quote

I will update this with the work that i have done as of now in a little while

Edited:
131.40.15.0 to (131.40.0.0)

This post has been edited by quim: 17 November 2007 - 10:14 PM

[baavgai]

I don't do network admin, but I can give a couple tips.

First, the /16 makes that 15 octet a bit misleading, it gets wiped by the mask. Second, subnet calculators are your friend: http://www.subnet-calculator.com/

I have some ideas, but I'm no expert. Class C is all I usually need to play with. I'd be interested in the solution.

[quim]

This is what i have done as of now.

IP Address: 131.40.0.0
Default Subnet: 255.255.0.0
OR
IP Address:10000011.00101000.00000000.00000000
Default Subnet:11111111.11111111.00000000.00000000

"this is a smaller network, but i want to take the same approach that i would take in my actual assignment which i will need more host and subnets"

6 building = 6 subnets
6 * 50 establishment = 300 subnets
total subnet = 306

This post has been edited by quim: 17 November 2007 - 10:15 PM

[snoj]

So are you wanting to use VLSM? If not, just break the class B into 510 networks.

[quim]

I Need 306 subnet and about 10.
for 306 subnets i borrow 9 bits which will give me a total of 512 subnets.
minus 2.
the 00000000.0 and 11111111.1 subnets


IP: 131.40.0.0/16 10000011.00101000.00000000.00000000
SN: 255.255.0.0 11111111.11111111.00000000.00000000

Subnet #0: 10001100.00011001.00000000.0 0000000 = 131.40.0.0/25 NO USE
Subnet #1: 10001100.00011001.00000000.1 0000000 = 131.40.0.128/25
Subnet #2: 10001100.00011001.00000001.0 0000000 = 131.40.1.0/25
Subnet #3: 10001100.00011001.00000001.1 0000000 = 131.40.1.128/25
...
...
...
Subnet #510: 10001100.00011001.11111111.0 0000000 = 131.40.255.0/25
Subnet #511: 10001100.00011001.11111111.1 0000000 = 131.40.255.128/25 NO USE

Assign ip for subnet #1 eg:

Network: 131.40.0.128
First: 131.40.0.129
Last: 131.40.0.254
Broadcast: 131.40.0.255

now i will probably be able to do my assignment, but yet what boders me now is having all those (512-306) subnets unused and (126-10) IP on each subnets unused.

Does any one know how i could fix this problem?

[snoj]

Yes, VLSM, however if your Cisco class(es) is anything like mine, you won't begin to seriously learn about it until Cisco 3.

[cudaman73]

snoj, on 17 Nov, 2007 - 11:05 PM, said:

Yes, VLSM, however if your Cisco class(es) is anything like mine, you won't begin to seriously learn about it until Cisco 3.

We did VLSM in Cisco 1. Had a giant (read: GIANT) packet on it. Probably 150-200 pages on VLSM.

Fortunately, I prefer VLSM over CLSM, so.... yeah.