7.3.2.9 Packet Tracer – Troubleshooting IPv4 and IPv6 Addressing
Packet Tracer – Troubleshooting IPv4 and IPv6 Addressing (Answer Version)
Answer Note: Red font color or gray highlights indicate text that appears in the Answer copy only.
Topology
7.3.2.9 Packet Tracer – Troubleshooting IPv4 and IPv6 Addressing
Addressing Table
| Device | Interface | IPv4 Address | Subnet Mask | Default Gateway |
| IPv6 Address/Prefix | ||||
| R1 | G0/0 | 10.10.1.1 | 255.255.255.0 | N/A |
| G0/1 | 192.168.0.1 | 255.255.255.0 | N/A | |
| 2001:DB8:1:1::1/64 | N/A | |||
| G0/2 | 2001:DB8:1:2::1/64 | N/A | ||
| S0/0/0 | 209.165.201.2 | 255.255.255.252 | N/A | |
| 2001:DB8:1:A001::2/64 | N/A | |||
| Link-local | FE80::1 | N/A | ||
| Dual Stack Server | NIC | 64.100.1.254 | 255.255.255.0 | 64.100.1.1 |
| 2001:DB8:CAFE:1::10/64 | FE80::A | |||
| DNS Server | NIC | 64.100.1.254 | 255.255.255.0 | 64.100.1.1 |
| 2001:DB8:CAFE:1::10/64 | FE80::A | |||
| PC1 | NIC | 10.10.1.2 | 255.255.255.0 | 10.10.1.1 |
| PC2 | NIC | 192.168.0.2 | 255.255.255.0 | 192.168.0.1 |
| 2001:DB8:1:1::2/64 | FE80::1 | |||
| PC3 | NIC | 2001:DB8:1:2::2/64 | FE80::1 | |
Objectives
Part 1: Troubleshoot First Issue
Part 2: Troubleshoot Second Issue
Part 3: Troubleshoot Third Issue
Scenario
You are a network technician working for a company that has decided to migrate from IPv4 to IPv6. In the interim, they must support both protocols (dual-stack). Three co-workers have called the help desk with problems and have received limited assistance. The help desk has escalated the matter to you, a Level 2 support technician. Your job is to locate the source of the problems and implement appropriate solutions.
Part 1: Troubleshoot First Issue
A customer using PC1 complains that she cannot access the dualstackserver.pka web page.
Step 1: Verify a detailed help desk ticket.
The help desk collected the following information from the customer, over the phone. Verify that it is correct.
| Help Desk Ticket | |
| Client Identifier: PC1 | |
| Issue: Unable to access the dualstackserver.pka web page. | |
| Detailed information about the issue | |
| Test: Does the computer have an IP address using ipconfig? | Yes |
| Test: Can the computer contact its gateway using ping? | Yes |
| Test: Can the computer contact the server using tracert? | Yes |
| Test: Can the computer contact the server using nslookup? | No |
| Resolution: Escalate to Level 2 support. | |
Step 2: Consider probable causes for the failure.
- Note the tests that have been conducted. If possible, discuss possible scenarios that would create this situation with your fellow network technicians (classmates).
- Run more tests if it helps visualize the problem. Simulation mode is available.
Step 3: Propose a solution to solve the problem.
Make a list of things that could be changed to solve this problem. Start with the solution that is most likely to work.
Step 4: Implement the plan.
Try the most likely solution from the list. If it has already been tried, move on to the next solution.
Step 5: Verify the solution resolved the problem.
- Repeat the tests from the help desk ticket. Did it solve the problem?
- If the problem still exists, reverse the change if you are not sure it is correct and return to Step 4.
Step 6: Document the solution.
Record the solution to the problem. If you ever encounter the same problem again, your notes will be very valuable. PC1 IPv4 DNS address is incorrect.
Part 2: Troubleshoot Second Issue
A customer using PC2 complains that he cannot access files on the DualStackServer.pka at 2001:DB8:CAFE:1::10.
Step 1: Verify a detailed help desk ticket.
The help desk collected the following information from the customer, over the phone. Verify that it is correct.
| Help Desk Ticket | |
| Client Identifier: PC2 | |
| Issue: Unable to access the FTP service of 2001:DB8:CAFE:1:10. | |
| Detail information about the Issue | |
| Test: Does the computer have an IPv6 address using ipv6config? | Yes |
| Test: Can the computer contact its gateway using ping? | Yes |
| Test: Can the computer contact the server using tracert? | No |
| Resolution: Escalate to Level 2 support. | |
Step 2: Complete Steps 2 to 5 from Part 1 for this problem.
Step 3: Document the solution.
Record the solution to the problem. If you ever encounter the same problem again, your notes will be very valuable. DualStackServer.pka IPv6 gateway address is incorrect
Part 3: Troubleshoot Third Issue
A customer using PC3 complains that he cannot communicate with PC2.
Step 1: Verify a detailed help desk ticket.
The help desk collected the following information from the user over the phone. Verify that it is correct.
| Help Desk Ticket | |
| Client Identifier: PC3 | |
| Issue: Unable to communicate with PC2. | |
| Detail information about the Issue | |
| Test: Does the computer have an IP address using ipconfig? | Yes |
| Test: Does computer have an IPv6 address using ipv6config? | Yes |
| Test: Can the computer contact its IPv4 gateway using ping? | No |
| Test: Can the computer contact its IPv6 gateway using ping? | Yes |
| Test: Can the computer contact the IPv4 client using tracert? | No |
| Test: Can the computer contact the IPv6 client using tracert? | Yes |
| Resolution: Escalate to Level 2 support. | |
Step 2: Complete Steps 2 to 5 from Part 1 for this problem.
Step 3: Document the solution.
Record the solution to the problem. If you ever encounter the same problem again, your notes will be very valuable. PC2 IPv4 gateway address is incorrect