4.4.8 Packet Tracer – Troubleshoot Inter-VLAN Routing – Instructions Answer

Packet Tracer – Troubleshoot Inter-VLAN Routing (Instructor Version)

Addressing Table

DeviceInterfaceIP AddressSubnet MaskDefault GatewayVLAN
R1G0/1.10172.17.10.1255.255.255.0N/AVLAN 10
G0/1.30172.17.30.1255.255.255.0N/AVLAN 30
PC1NIC172.17.10.10255.255.255.0172.17.10.1VLAN 10
PC3NIC172.17.30.10255.255.255.0172.17.30.1VLAN 30


  • Part 1: Locate Network Problems
  • Part 2: Implement the Solution
  • Part 3: Verify Network Connectivity


In this activity, you will troubleshoot connectivity problems caused by improper configurations related to VLANs and inter-VLAN routing.


Part 1: Locate the Network Problems

Examine the network and locate the source of any connectivity issues.

Commands you may find useful include:

R1# show ip interface brief
R1# show interface g0/1.10
R1# show interface g0/1.30
S1# show interface trunk
  • Test connectivity and use the necessary show commands to verify configurations.
  • Verify that all configured settings match the requirements shown in the Addressing Table.
  • List all of the problems and possible solutions in the Documentation Table.
    Documentation Table

Part 2: Implement the Solutions

Implement your recommended solutions.

Part 3: Verify Network Connectivity

Verify the PCs can ping each other and R1. If not, continue to troubleshoot until the pings are successful.

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