4.4.8 Packet Tracer – Troubleshoot Inter-VLAN Routing (Instructor Version)
Addressing Table
| Device | Interface | IP Address | Subnet Mask | Default Gateway | VLAN |
|---|---|---|---|---|---|
| R1 | G0/1.10 | 172.17.10.1 | 255.255.255.0 | N/A | VLAN 10 |
| G0/1.30 | 172.17.30.1 | 255.255.255.0 | N/A | VLAN 30 | |
| PC1 | NIC | 172.17.10.10 | 255.255.255.0 | 172.17.10.1 | VLAN 10 |
| PC3 | NIC | 172.17.30.10 | 255.255.255.0 | 172.17.30.1 | VLAN 30 |
Objectives
- Part 1: Locate Network Problems
- Part 2: Implement the Solution
- Part 3: Verify Network Connectivity
Scenario
In this activity, you will troubleshoot connectivity problems caused by improper configurations related to VLANs and inter-VLAN routing.
Instructions
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
| Problems | Solutions |
|---|---|
| The G0/1 physical interface is up but G0/1.10 subinterface is administratively down. | Implement the no shutdown command to enable the G0/1.10 subinterface. |
| PC3 is configured with the wrong default gateway address. | Change the default gateway on PC3 from 172.17.10.1 to 172.17.30.1 |
| Interface G0/1 on S1 is configured as an access port instead of trunk port. | Use the command switchport mode trunk to change the interface from access mode to trunk mode. |
| Subinterface VLAN assignments are switched on R1. The configured assignments do not match the ones shown in the Addressing Table. | Issue the no encapsulation dot1q command to remove the incorrect configuration. Then configure the subinterfaces with the correct encapsulation dot1q vlan_number command. Reenter the correct IP address information. |
Part 2: Implement the Solutions
Implement your recommended solutions.
R1(config)#interface g0/1.10 R1(config-subif)#no shutdown R1(config-subif)#exit R1(config)#interface g0/1.10 R1(config-subif)#no encapsulation dot1Q R1(config-subif)#int g0/1.30 R1(config-subif)#no encapsulation dot1Q R1(config-subif)#exit R1(config)#int g0/1.10 R1(config-subif)#encapsulation dot1Q 10 R1(config-subif)#ip address 172.17.10.1 255.255.255.0 R1(config-subif)# R1(config-subif)#int g0/1.30 R1(config-subif)#encapsulation dot1Q 30 R1(config-subif)#ip address 172.17.30.1 255.255.255.0
S1(config)#interface g0/1 S1(config-if)#switchport mode trunk
Part 3: Verify Network Connectivity
Verify the PCs can ping each other and R1. If not, continue to troubleshoot until the pings are successful.
){kind=link}
Originally i thought that the vlan were on R1 were not fixed but im just stupid. xD
You need first to see the inter-vlans with the show ip interface command :
R1#show ip interface g0/1.10
R1#show ip interface g0/1.30
So you will need to delete the inter-vlans witch is configured wrong: (wrong ip)
And after you will create them again:
interface GigabitEthernet0/1.10
encapsulation dot1Q 10
ip address 172.17.10.1 255.255.255.0
interface GigabitEthernet0/1.30
encapsulation dot1Q 30
ip address 172.17.30.1 255.255.255.0
Also you need to check the status of the interfaces with #show ip interface brief
You will need to enable g0/1.10 with no shut command and you will have 100%
All this is for the Router
This is the logic behind the lab plz do not complain “Captain Obvious etc”
Thanks for the info by the way you are the best ITEXAMS thank you !
fyi the lab still the same
Not sure why the poor votes. If the ones leaving the poor votes cant figure out how to script it, then start over in CCNA 1. Everything in the write up is correct. Thank you to the creators for sharing this content.
Thanks for your review! :)
Not sure why ur mom is leaving poor votes. JK JK, sorry about my humor I’m actually only 8 years old. Anyways agreed, everything in the write up is correct.