Creating multiple vLANs in a vRack

Last update 24th February 2022

Objective

The standard vRack configuration enables you to create only one vLAN. This means that you can only use each IP address once. However, with the vRack version 2.0 configuration, you can create up to 4,000 vLANs within a single vRack. This means that you can use each IP address up to 4,000 times.

This guide will show you how to create multiple vLANs within the vRack.

Requirements

• An active vRack service in your account
• Two or more vRack-compatible servers
• Administrative (root) access to the server via SSH
• Access to the OVHcloud Control Panel
• Your chosen private IP address range
• You must have completed the vRack configuration guide.

Instructions

Linux

Ubuntu 20 & 21

These commands were executed under Ubuntu 21.10 (Impish Indri).

First, you need to establish an SSH connection to your server, and run the following commands from the command line. This will install the vLAN package on your server:

sudo apt-get install vlan

Load the 8021q kernel module:

sudo su -c 'echo "8021q" >> /etc/modules'

Create or edit this configuration file to prevent changes to your network configuration from being made automatically:

sudo nano /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg

And add this line:

network: {config: disabled}

Get the network interface name and it's MAC address:

ip a

Here the interface that we want to configure is eno2 with MAC address: d0:50:99:d6:6b:14.

Add the network configuration for this network interface and the VLAN declaration in the following file:

sudo nano /etc/netplan/50-cloud-init.yaml

network:
    version: 2
    ethernets:
        eno2:
            match:
                macaddress: d0:50:99:d6:6b:14
        eno1:
            ...
            ...
    vlans:
        vlan10:
            id: 10                      # VLAN ID    
            link: eno2                  # Interface name
            addresses:
            - 192.168.0.14/16

Save and close the file, then run the following commands:

sudo netplan try
sudo netplan apply

Use the following command to confirm the configuration:

ip a

Debian

First, you need to establish an SSH connection to your server, and run the following commands from the command line. This will install the vLAN package on your server:

# sudo apt-get install vlan

Next, we need to create a vLAN tag. The tag is an identifier that allows you differentiate between multiple vLANs:

# vconfig add eth1 10

Added VLAN with VID == 10 to IF -:eth1:-

Next, we need to declare the IP address range within the vRack and tag it with our identifier. We can do this with the following command:

# ip addr add 192.168.0.0/16 dev eth1.10

Lastly, we need to amend the configuration of our network interface so that it takes into account the vLAN tag. For this step, you will need to open your network interface configuration file for editing, and amend it as shown below:

# sudo /etc/network/interfaces

auto eth1.10
iface eth1.10 inet static
address 192.168.0.50
netmask 255.255.0.0
broadcast 192.168.255.255

Windows

Log on to your server via a remote desktop connection, and open the Server Manager app. Then select Local Server. Now click the Disabled link next to NIC Teaming:

Next, create a new team by selecting a network interface, and typing a team name into the Team name field. When you have finished, click OK:

Next, we need to define the vLAN tag. In the Adapters and Interfaces pane of the NIC Teaming screen, right-click the interface you have just added to the new team, then click Properties. Now click Specific VLAN, and define the tag:

Next, we need to configure the IP address of the vLAN. Click the Start button on your keyboard, then click Control Panel:

Next, click Network and Internet:

Then Network and Sharing Center:

Then click Change adapter settings:

Next, right-click the vLAN interface, and click Properties:

Then double-click Internet Protocol Version 4 (TCP/IP/IPv4):

Next, click Use the following IP address. For IP address, type in an IP from your internal range. For Subnet mask, type in 255.255.0.0.

Finally, click the OK button to save the changes, then reboot your server.

Go further

Configuring the vRack on your Dedicated Servers

Join our community of users on https://community.ovh.com/en/.

These guides might also interest you...