340 Chapter 5: Network Protocols
Scenario Answers
Answers to Scenario 5-1: IP Addressing and Subnet
Calculation
Assuming that you had issued the commands in Example 5-28, the most specific network
diagram would look like Figure 5-48.
Figure 5-48
Scenario 5-1 Answer--Network with Router Fred
The clues that you should have found in the show commands are as follows:
·
The types and IP addresses of the interfaces on Fred were in the show interface and show
ip interface brief command output.
·
The subnets could be learned from the show ip route command or derived from the IP
addresses and masks shown in the show interface command output.
·
The neighboring router's IP addresses could be learned from the show ip protocol
command.
·
The neighboring routers' IP addresses and host names could be learned from the show
cdp neighbor detail command.
·
The metric for subnet 199.1.1.128/27 in RIP updates implies that both neighbors have an
equal-cost route to the same subnet. Because two separate but duplicate networks would
be a bad design, you can assume that the neighboring routers are attached to the same
medium.
Fred
Barney
Dino
s1
s1
s1
s0
s0
s0
Subnet 199.1.1.160
Subnet 199.1.1.192
Subnet 199.1.1.128
Subnet 199.1.1.64
Subnet 199.1.1.96
Subnet 199.1.1.32
ch05.fm Page 340 Monday, March 20, 2000 5:06 PM