Network Troubleshooting lab - Hsanokklis/2022-2023-Tech-journal GitHub Wiki

Objective:

Solve common network issues following an organized approach that incorporates some or all of the 6 troubleshooting methodologies.

Goals:

Practice implementing the 6 troubleshooting methodologies to solve network issues
Analyze the approach taken and explain the methods used
Review network principles learned during the course including layer 2 and 3, routing, VLANs

Foster Laptop should be able to ping Skiff Laptop

Problem: Skiff laptop didn't have a default gateway assigned. Once I assigned the default gateway Foster laptop was able to ping skiff laptop.

Foster Laptop should be able to ping Skiff Laptop

Problem 1: The port on for the F0/1 interface on the CNCS router was turned off, so I turned it back on
Problem 2: The F0/1 interface was not configured with a IPv4(default gateway) and the subnet mask

PC0, PC1, PC2, PC3 should all be able to ping PC4

Problem: The configurations for the interfaces on the router were switches and written wrong in the note someone wrote.

Method:

I first checked the router and all the PCs to make sure they had the correct gateway
then I tested connectivity, I tried pinging the router with the 4 PCs attached and they couldn't ping it so I knew there was something wrong with the router.

PC0, PC1 should be able to ping PC2

Problem: There was a missing static route on router3

Method:

I checked the default gateways and IPv4s for all the devices
I watched the ping from PC0 to PC2 and saw that the ping could reach PC2 but it could not reply back and it failed at Router3, so the problem was at router 3

Problem: The VLAN numbers were not configured correctly for the 2 switches

Method:

I tried to ping PC's on their own VLANs and notices that I could not do that
I went through the all the VLAN databases to see if they all had the correct VLAN numbers