Configuring VLAN on Juniper Devices

VLANs (Virtual Local Area Networks) provide a way to logically separate devices on a network while still using the same physical infrastructure. In this guide, we will go through the steps to configure VLANs on Juniper devices.

Step 1: Create VLANs

To create VLANs, log in to the Juniper device's command-line interface (CLI) and enter configuration mode. Then, use the following command to create a VLAN:

set vlans {VLAN name} vlan-id {VLAN ID}

Replace {VLAN name} with the desired name for the VLAN and {VLAN ID} with a unique ID number for the VLAN. Repeat this command for each VLAN you want to create.

Step 2: Assign Interfaces to VLANs

After creating VLANs, assign interfaces to each VLAN. Use the following command to add an interface to a VLAN:

set interfaces {interface name} unit {unit number} vlan-id {VLAN ID}

Replace {interface name} with the name of the interface (e.g., ge-0/0/0) and {unit number} with the unit number associated with the interface. Finally, replace {VLAN ID} with the ID number of the VLAN you want to assign the interface to. Repeat this command for each interface you want to assign to a VLAN.

Step 3: Configure VLAN Tagging

By default, all traffic on an interface is sent untagged. To enable VLAN tagging, use the following command:

set interfaces {interface name} unit {unit number} family ethernet-switching interface-mode trunk vlan members {VLAN name}

Replace {interface name} and {unit number} with the name and unit number of the interface you want to configure. Replace {VLAN name} with the name of the VLAN you want to enable tagging for. Repeat this command for each VLAN you want to enable tagging for.

Step 4: Verify the Configuration

After completing the above steps, verify that the VLAN configuration is correct using the following commands:

show vlans
show interfaces

The show vlans command will display all VLANs and their associated VLAN IDs. The show interfaces command will display all interfaces and their associated VLANs.

Congratulations! You have successfully configured VLANs on your Juniper device.