16.3.1 Packet Tracer – Troubleshoot Static and Default Routes Answers

16.3.1 Packet Tracer – Troubleshoot Static and Default Routes Answers

Packet Tracer – Troubleshoot Static and Default Routes (Instructor Version)

Instructor Note: Red font color or gray highlights indicate text that appears in the instructor copy only.

Addressing Table

Device

Interface

IP Addresses

R1

G0/0

172.31.1.1/25

R1

G0/0

2001:DB8:1::1/64

R1

S0/0/0

172.31.1.194/30

R1

S0/0/0

2001:DB8:2::194/64

R2

G0/0

172.31.0.1/24

R2

G0/0

2001:DB8:3::1/64

R2

S0/0/0

172.31.1.193/30

R2

S0/0/0

2001:DB8:2::193/64

R2

S0/0/1

172.31.1.197/30

R2

S0/0/1

2001:DB8:4::197/64

R3

G0/0

172.31.1.129/26

R3

G0/0

2001:DB8:5::1/64

R3

S0/0/1

172.31.1.198/30

R3

S0/0/1

2001:DB8:4::198/64

PC1

NIC

172.31.1.126/25

PC1

NIC

2001:DB8:1::126/64

PC2

NIC

172.31.0.254/24

PC2

NIC

2001:DB8:3::254/64

Server

NIC

172.31.1.190/26

Server

NIC

2001:DB8:5::190/64

Objectives

In this activity you will troubleshoot static and default routes and repair any errors that you find.

  • Troubleshoot IPv4 static routes.
  • Troubleshoot IPv4 default routes.
  • Troubleshoot IPv6 static routes.
  • Configure IPv4 static routes.
  • Configure IPv4 default routes.
  • Configure IPv6 static routes.

Background / Scenario

A newly hired network technician is attempting to preconfigure a simple topology that will be delivered to a customer. The technician has not been able to establish connectivity between the three LANs. You have been asked to troubleshoot the topology and verify connectivity between the hosts on the three LANs over IPv4 and IPv6.

Instructions

Step 1:  Locate and document the problems.

Record your findings in a table like the one below.

Location

Problem

Solution

R1

IPv4 Default route next hop interface address is incorrect.

Change next hop address to 172.31.1.193

R2

IPv6 route to LAN 1 has the wrong network address for the destination network.

Change destination address from 2001:DB6:1::/64 to 2001:DB8:1::/64

R2

The next hop addresses in the two IPv4 routes are reversed.

Change the statements to ip route 172.31.1.0 255.255.255.128 172.31.1.194 and ip route 172.31.1.128 255.255.255.192 172.31.1.198

R3

The IPv6 route to LAN 1 is missing.

Configure a directly connected static route to 2001:DB8:1::/64

R3

The IPv4 route to LAN 1 has the wrong mask for the network.

Change the mask to 255.255.255.128

Step 2:  Repair the problems.

Configure the devices so that full connectivity exists between the hosts on the LANs over IPv4 and IPv6.

Note: Your task is to establish connectivity using the existing static route design. Changing the types of static routes used will result in a loss of points.

End of document

Answer Configurations

Router R1

enable

conf t

no ip route 0.0.0.0 0.0.0.0 172.31.1.195

ip route 0.0.0.0 0.0.0.0 172.16.1.193

end

Router R2

enable

conf t

no ip route 172.31.1.0 255.255.255.128 172.31.1.198

no ip route 172.31.1.128 255.255.255.192 172.31.1.194

ip route 172.31.1.0 255.255.255.128 172.31.1.194

ip route 172.31.1.128 255.255.255.192 172.31.1.198

no ipv6 route 2001:DB6:1::/64 2001:DB8:3::194

ipv6 route 2001:DB8:1::/64 2001:DB8:2::194

end

Router R3

enable

conf t

no ip route 172.31.1.0 255.255.255.240 Serial0/0/1

ip route 172.31.1.0 255.255.255.128 Serial0/0/1

ipv6 route 2001:DB8:1::/64 Serial0/0/1

end

 

Leave a comment