© 2016 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. Page 1 of 3
Packet Tracer - Troubleshooting Connectivity Issues
Topology
Addressing Table
Device Interface IP Address Subnet Mask Default Gateway
R1
G0/0 172.16.1.1 255.255.255.0 N/A
G0/1 172.16.2.1 255.255.255.0 N/A
S0/0/0 209.165.200.226 255.255.255.252 N/A
R2
G0/0 209.165.201.1 255.255.255.224 N/A
S0/0/0 (DCE) 209.165.200.225 255.255.255.252 N/A
PC-01 NIC 172.16.1.3 255.255.255.0 172.16.1.1
PC-02 NIC 172.16.1.4 255.255.255.0 172.16.1.1
PC-A NIC 172.16.2.3 255.255.255.0 172.16.2.1
PC-B NIC 172.16.2.4 255.255.255.0 172.16.2.1
Web NIC 209.165.201.2 255.255.255.224 209.165.201.1
DNS1 NIC 209.165.201.3 255.255.255.224 209.165.201.1
DNS2 NIC 209.165.201.4 255.255.255.224 209.165.201.1
Objectives
The objective of this Packet Tracer activity is to troubleshoot and resolve connectivity issues, if possible.
Otherwise, the issues should be clearly documented and so they can be escalated.
Packet Tracer - Troubleshooting Connectivity Issues
© 2016 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. Page 2 of 3
Background / Scenario
Users are reporting that they cannot access the web server, www.cisco.pka after a recent upgrade that
included adding a second DNS server. You must determine the cause and attempt to resolve the issues for
the users. Clearly document the issues and any solution(s). You do not have access to the devices in the
cloud or the server www.cisco.pka. Escalate the problem if necessary.
Router R1 can only be accessed using SSH with the username Admin01 and password cisco12345.
Step 1: Determine the connectivity issue between PC-01 and web server.
a. On PC-01, open the command prompt. Enter the command ipconfig to verify what IP address and
default gateway has been assigned to PC-01. Correct as necessary.
b. After correcting the IP addressing issues on PC-01, issue the pings to the default gateway, web server,
and other PCs. Were the pings successful? Record the results.
Ping to default gateway (172.16.1.1) To web server (209.165.201.2)
Ping to PC-02 To PC-A To PC-B
c. Use the web browser to access the web server on PC-01. Enter the URL www.cisco.pka and then using
the IP address 209.165.201.2. Record the results.
Can PC-01 access www.cisco.pka? using the web server IP address?
d. Document the issues and provide the solution(s). Correct the issues if possible.
Step 2: Determine the connectivity issue between PC-02 and web server.
a. On PC-02, open the command prompt. Enter the command ipconfig to verify the configuration for the IP
address and default gateway. Correct as necessary.
b. After correcting the IP addressing issues on PC-02, issue the pings to the default gateway, web server,
and other PCs. Were the pings successful? Record the results.
Ping to default gateway (172.16.1.1) To web server (209.165.201.2)
Ping to PC-01 To PC-A To PC-B
c. Navigate to www.cisco.pka using the web browser on PC-02. Record the results.
Can PC-01 access www.cisco.pka? using the web server IP address
d. Document the issues and provide the solution(s). Correct the issues if possible.
Step 3: Determine the connectivity issue between PC-A and web server.
a. On PC-A, open the command prompt. Enter the command ipconfig to verify the configuration for the IP
address and default gateway. Correct as necessary.
b. After correcting the IP addressing issues on PC-A, issue the pings to the default gateway, web server,
and other PCs. Were the pings successful? Record the results.
Ping to default gateway (172.16.2.1) To web server (209.165.201.2)
Ping to PC-B To PC-01 To PC-02
c. Navigate to www.cisco.pka.net using the web browser on PC-A. Record the results.
Packet Tracer - Troubleshooting Connectivity Issues
© 2016 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. Page 3 of 3
Can PC-A access www.cisco.pka? using the web server IP address
d. Document the issues and provide the solution(s). Correct the issues if possible.
Step 4: Determine the connectivity issue between PC-B and web server.
a. On PC-B, open the command prompt. Enter the command ipconfig to verify the configuration for the IP
address and default gateway. Correct as necessary.
b. After correcting the IP addressing issues on PC-B, issue the pings to the default gateway, web server,
and other PCs. Were the pings successful? Record the results.
Ping to default gateway (172.16.2.1) To web server (209.165.201.2)
Ping to PC-A To PC-01 To PC-02
c. Navigate to www.cisco.pka using the web browser. Record the results.
Can PC-B access www.cisco.pka? using the web server IP address
d. Document the issues and provide the solution(s). Correct the issues if possible.
Step 5: Verify connectivity.
Verify that all the PCs can access the web server www.cisco.pka.
Your completion percentage should be 100%. If not, click Check Results to see which required components
are not yet completed.
Suggested Scoring Rubric
Activity Section Possible Points Earned Points
Step 1d
5
Step 2d
5
Step 3d
5
Step 4d
5
Packet Tracer
15
Total Score 35