Information Technology Reference
In-Depth Information
Device
Interface
IP Address
Subnet Mask
B1-R2
Fa0/0
172.20.0.1
255.255.252.0
Fa0/1
172.20.4.1
255.255.252.0
Fa1/0
172.20.8.1
255.255.252.0
Fa1/1
172.20.12.1
255.255.252.0
S0/0/0
172.20.255.242
255.255.255.252
B2-R2
Fa0/0
172.20.16.1
255.255.254.0
Fa0/1
172.20.18.1
255.255.254.0
Fa1/0
172.20.20.1
255.255.254.0
Fa1/1
172.20.22.1
255.255.254.0
S0/0/0
172.20.255.246
255.255.255.252
B3-R2
Fa0/0
172.20.24.1
255.255.255.0
Fa0/1
172.20.25.1
255.255.255.0
Fa1/0
172.20.26.1
255.255.255.0
Fa1/1
172.20.27.1
255.255.255.0
S0/0/0
172.20.255.250
255.255.255.252
ISP-R2
S0/0/0
209.165.201.9
255.255.255.252
S0/0/1
209.165.201.6
255.255.255.252
Fa0/0
209.165.200.229
255.255.255.252
Web Server 2
NIC
209.165.200.230
255.255.255.252
Task 1: Design and Document an Addressing Scheme
Design an addressing scheme.
Step 1.
Using the topology in Figure 6-22 and the following requirements, design an addressing
scheme:
The WAN links between R1 and R2 and their respective ISP routers are already con-
figured. Also, the links between the ISPs and the web servers are already configured.
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The address space for Region 1 is 10.1.0.0/16. Each branch router (B1-R1, B2-R1, and
B3-R1) should be allotted address space based on the following requirements. Starting
with the largest requirement, assign address space to each router:
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B1-R1 needs space for 32,000 hosts:
10.1.0.0/17
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B2-R1 needs space for 16,000 hosts:
10.1.128.0/18
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B3-R1 needs space for 8000 hosts:
10.1.192.0/19
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Divide the address space for each branch router into four equal subnets. Record the
subnets in the following tables.
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