Last Updated on May 3, 2018 by Admin
3.4.2.5 Packet Tracer – Troubleshooting GRE
From year to year, Cisco has updated many versions with difference questions. The latest version is version 6.0 in 2018. What is your version? It depends on your instructor creating your class. We recommend you to go thought all version if you are not clear. While you take online test with netacad.com, You may get random questions from all version. Each version have 1 to 10 different questions or more. After you review all questions, You should practice with our online test system by go to "Online Test" link below.
Version 5.02 | Version 5.03 | Version 6.0 | Online Assessment |
Chapter 3 Exam | Chapter 3 Exam | Chapter 3 Exam | Online Test |
Next Chapter | |||
Chapter 4 Exam | Chapter 4 Exam | Chapter 4 Exam | Online Test |
CCNA 4 Lab Activities | |||
3.4.2.4 Packet Tracer – Configuring GRE | |||
3.4.2.5 Packet Tracer – Troubleshooting GRE | |||
3.5.3.4 Packet Tracer – Configure and Verify eBGP | |||
3.6.1.2 Packet Tracer – Skills Integration Challenge |
Packet Tracer – Troubleshooting GRE (Answer Version)
Answer Note: Red font color or gray highlights indicate text that appears in the Answer copy only.
Topology

3.4.2.5 Packet Tracer – Troubleshooting GRE
Addressing Table
Device | Interface | IP Address | Subnet Mask | Default Gateway |
RA | G0/0 | 172.31.0.1 | 255.255.255.0 | N/A |
S0/0/0 | 209.165.122.2 | 255.255.255.252 | N/A | |
Tunnel 0 | 192.168.1.1 | 255.255.255.252 | N/A | |
RB | G0/0 | 172.31.1.1 | 255.255.255.0 | N/A |
S0/0/0 | 64.103.211.2 | 255.255.255.252 | N/A | |
Tunnel 0 | 192.168.1.2 | 255.255.255.252 | N/A | |
PC-A | NIC | 172.31.0.2 | 255.255.255.0 | 172.31.0.1 |
PC-C | NIC | 172.31.1.2 | 255.255.255.0 | 172.31.1.1 |
Objectives
Find and Correct All Network Errors
Verify Connectivity
Scenario
A junior network administrator was hired to set up a GRE tunnel between two sites and was unable to complete the task. You have been asked to correct configuration errors in the company network.
Part 1: Find and Correct All Network Errors.
Device | Error | Correction |
RA | G0/0 IP interface and subnet mask is not correct. Tunnel address must be removed to prevent overlap error. | interface Tunnel 0
no ip address interface g0/0 ip address 172.31.0.1 255.255.255.0 |
RA | T0 IP address is not correct. | interface Tunnel 0
ip address 192.168.1.1 255.255.255.252 |
RA | Static route is not correct. | no ip route 172.31.1.0 255.255.255.0 64.103.211.2
ip route 172.31.1.0 255.255.255.0 192.168.1.2 |
RB | Tunnel destination address is not correct. | tunnel destination 209.165.122.2 |
RB | Tunnel source port is not correct. | tunnel source Serial0/0/0 |
Part 2: Verify Connectivity
Step 1: Ping PCA from PCB.
Attempt to ping the IP address of PCA from PCB. The ping should be successful.
Step 2: Trace the path from PCA to PCB.
Attempt to trace the path from PCA to PCB. Note the lack of public IP addresses in the output.
Device Configs
Router RA
no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption hostname RA interface Tunnel0 ip address 192.168.1.1 255.255.255.252 tunnel source Serial0/0/0 tunnel destination 64.103.211.2 tunnel mode gre ip interface GigabitEthernet0/0 ip address 172.31.0.1 255.255.255.0 duplex auto speed auto interface GigabitEthernet0/1 no ip address duplex auto speed auto shutdown interface GigabitEthernet0/2 no ip address duplex auto speed auto shutdown interface Serial0/0/0 ip address 209.165.122.2 255.255.255.252 interface Serial0/0/1 no ip address shutdown interface Vlan1 no ip address shutdown ip classless ip route 0.0.0.0 0.0.0.0 Serial0/0/0 ip route 172.31.1.0 255.255.255.0 192.168.1.2 line con 0 line aux 0 line vty 0 4 login end
Router RB
no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption hostname RB interface Tunnel0 ip address 192.168.1.2 255.255.255.252 tunnel source Serial0/0/0 tunnel destination 209.165.122.2 tunnel mode gre ip interface GigabitEthernet0/0 ip address 172.31.1.1 255.255.255.0 duplex auto speed auto interface GigabitEthernet0/1 no ip address duplex auto speed auto shutdown interface GigabitEthernet0/2 no ip address duplex auto speed auto shutdown interface Serial0/0/0 ip address 64.103.211.2 255.255.255.252 interface Serial0/0/1 no ip address shutdown interface Vlan1 no ip address shutdown ip classless ip route 0.0.0.0 0.0.0.0 Serial0/0/0 ip route 172.31.0.0 255.255.255.0 192.168.1.1 line con 0 line aux 0 line vty 0 4 login end
From year to year, Cisco has updated many versions with difference questions. The latest version is version 6.0 in 2018. What is your version? It depends on your instructor creating your class. We recommend you to go thought all version if you are not clear. While you take online test with netacad.com, You may get random questions from all version. Each version have 1 to 10 different questions or more. After you review all questions, You should practice with our online test system by go to "Online Test" link below.
Version 5.02 | Version 5.03 | Version 6.0 | Online Assessment |
Chapter 3 Exam | Chapter 3 Exam | Chapter 3 Exam | Online Test |
Next Chapter | |||
Chapter 4 Exam | Chapter 4 Exam | Chapter 4 Exam | Online Test |
CCNA 4 Lab Activities | |||
3.4.2.4 Packet Tracer – Configuring GRE | |||
3.4.2.5 Packet Tracer – Troubleshooting GRE | |||
3.5.3.4 Packet Tracer – Configure and Verify eBGP | |||
3.6.1.2 Packet Tracer – Skills Integration Challenge |