troubleshooting Question

Subnetting Help

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tmartin40Flag for United States of America asked on
RoutersNetworking ProtocolsNetwork Architecture
4 Comments1 Solution453 ViewsLast Modified:

I have been given an assignment to perform subnetting and although I know the very basics, this has me working like a monkey doing a math problem.  I am beyond lost.

The assignment states:

Develop an IPv4 addressing scheme for a remote office using the address with a minimum of IP waste for PC networks and exactly the correct number of IP's required between routers.  Also to provide a list of available (unused) nets by using the least number of bits for the subnetmask - CIDR.

Router One:
     Finance = 11PCs
     Account Room = 228 PCs
Router Two:
      IT Office = 5 PCs
     Web Sales = 58 PCs
Router Three:
     Administration = 5 PCs
     Business Section = 112 PCs

I have to provide the following for each (finance, IT Office,Administration, Business Section, Account Room, Web Sales) :
     Subnetmask being used
     NET ID
     IPs required
     IPs calculated
     First available host address
     Last available host address

Connections between the firewall router and router :
    subnetmask used?
     NET ID used?
     IP address assigned to firewall connection?
     IP address assigned to router 1 on firewall side?

Connections between router 1 & router 2
     NET ID?
     IP of router 1?
     IP of router 2?

Connections between router 2 & router 3:
     NET ID?
     IP of router 2?
     IP of router 3?
Henk van Achterberg
Sr. Technical Consultant
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