New Training: Troubleshoot Static and Dynamic 802.1q Trunking Protocols

In this 5-video skill, CBT Nuggets trainer Jeremy Cioara teaches you how to configure and troubleshoot common VLAN trunking issues. Learn core trunking concepts, and gain hands-on skills as you configure and troubleshooting trunking in a lab environment. Watch this new Cisco training.

Watch the full course: Cisco CCNP Enterprise Core

This training includes:

• 5 videos

• 44 minutes of training

You’ll learn these topics in this skill:

• Welcome to the Troubleshoot Static and Dynamic 802.1q Trunking Protocols Skill

• Reviewing Key Trunking Concepts

• Trunking Configuration Lab

• Trunking Troubleshooting Lab

• Concluding the Troubleshoot Static and Dynamic 802.1q Trunking Protocols Skill

What is VLAN Trunking?

A VLAN trunk is a point-to-point link between two network devices that carry more than a single VLAN. This allows the movement of traffic to various sections of a network that have been configured as a VLAN. By using a VLAN trunk, you can extend your VLAN across your whole network.

IEEE 802.1Q is the most common VLAN trunking protocol and is an open standard. It works by marking an Ethernet frame as it passes through a switch, tagging it as belonging to a particular VLAN.

With the VLAN Trunking Protocol (VTP), your switches can exchange VLAN configuration data. A Cisco-proprietary protocol, VTP broadcasts information about every VLAN based on its VLAN ID and name.

You can configure a switch port as a trunk link by using the switchport mode trunk command. This will set the port's interface into trunking mode. It will also negotiate the conversion between neighboring switches or links into trunk links.