Troubleshooting scenarios

Having covered troubleshooting techniques and tools, we now have a chance to put them into use by considering a real-world example. Keep in mind that some problems have multiple potential causes, and you may have to gather some information before making a conjecture as to the root cause.

VLAN configuration problem

First, let's consider an issue that I encountered when configuring a switch discussed in Chapter 3, VLANs. I installed a TP-Link TL-SG108E switch on my network, and had planned to set up two VLANs using this switch. I had given some consideration as to how the VLANs would be configured, and I settled on the following:

• Each VLAN would be assigned three ports (the TL-SG108E is an eight...