Information Technology Reference
In-Depth Information
Table 10-10
Addressing Table for R2
continued
Device
Interface
IP Address
Subnet Mask
B1-R2
Fa0/0
172.20.0.1
255.255.255.128
Fa0/1
172.20.0.129
255.255.255.128
Fa1/0
172.20.1.1
255.255.255.128
Fa1/1
172.20.1.129
255.255.255.128
S0/0/0
172.20.4.2
255.255.255.252
B2-R2
Fa0/0
172.20.2.1
255.255.255.192
Fa0/1
172.20.2.65
255.255.255.192
Fa1/0
172.20.2.129
255.255.255.192
Fa1/1
172.20.2.193
255.255.255.192
S0/0/0
172.20.4.6
255.255.255.252
B3-R2
Fa0/0
172.20.3.1
255.255.255.224
Fa0/1
172.20.3.33
255.255.255.224
Fa1/0
172.20.3.65
255.255.255.224
Fa1/1
172.20.3.97
255.255.255.224
S0/0/0
172.20.4.10
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 10-4 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 8000 hosts
10.1.0.0/19
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B2-R1 needs space for 4000 hosts
10.1.32.0/20
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B3-R1 needs space for 2000 hosts
10.1.48.0/21
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Divide the address space for each branch router into four equal subnets. Record the
subnets in the tables that follow.
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