New Training: Configure Layer 2 Switching on Junos

In this 11-video skill, CBT Nuggets trainer Knox Hutchinson explores the ways that Junos devices can implement layer 2 switching in various settings. Watch this new training.

Learn with one of these courses:

• Enterprise Routing and Switching Specialist
• Juniper Layer 2
• Juniper Enterprise Networking

This training includes:

• 11 videos
• 1.2 hours of training

You’ll learn these topics in this skill:

• Intro Junos Switching
• A Layer 2 Refresher
• EX-Series: Create VLANs
• EX-Series: Configure Access and Trunk Ports
• EX-Series: Inter-VLAN Routing
• EX-Series: Configure the Voice VLAN
• MX: Configure VLANs
• MX: Configure Access and Trunk Ports
• MX: Inter-VLAN Routing
• Now Do It With QFX-Series Switches
• Summarizing Junos Switching

How To Create A Basic VLAN With A Jun EX Series Device

Segmenting business networks with VLANs is an important function for a network with the business environment. VLANs help separate networks into groupings of logical nodes as well as limit the amount of network traffic flowing across the entire LAN. If a network has more than 200 devices, uses a lot of broadcast traffic, or requires additional security measures, VLANs should be configured in that network environment.

Creating a new VLAN for Juno EX devices can be relatively straightforward with these steps:

1. Apply a unique identifier to the VLAN
2. Assign one or more port interfaces for that VLAN

Below is an example of creating a basic VLAN through the Juno command line:

After interfaces are assigned to a VLAN, those interfaces will function in access mode. All interfaces in a VLAN will be under a single broadcast domain even if those interfaces are on different switches. Traffic can be assigned on any switch to a specific VLAN by referencing either the interface itself or the MAC addresses of the devices sending network traffic.