1.6 Configuring the network interface of an Ubuntu dedicated server

Prerequisites

Initial server configuration

• Access the server using an SSH client;
• to obtain administrative (root) privileges on the server, enter the following command:
   

  $ su -

• run the following command to edit the Netplan configuration:
   

  nano /etc/netplan/01-netcfg.yaml

• the initial configuration will be as follows:
   

  network:
    version: 2
    renderer: networkd
    ethernets:
      enp2s0:
      dhcp4: no
      addresses:
        - 62.149.128.4/24
      routes:
        - to: default
          via: 62.149.128.1
      nameservers:
        addresses: [62.149.190.150,217.61.55.10]

  in this example, we assume that:
  • the Ethernet network adapter is named enp2s0;
  • the VLAN ID value of the virtual switch link (available on the details page) is 2022;
  • a server is already connected to the virtual switch with IP address 10.10.10.1 and subnet mask 255.255.255.0;
  • the IP address you want to set is 10.10.10.2;

Creating the new network adapter for the SWaaS service

• Using Netplan, add the following code to create a network dedicated to the virtual switch:
   

    vlans:
      vlan2022:
        id: 2022
        link: enp2s0
        addresses: [ "10.10.10.2/24" ]

  • based on the example above, you must:
    • enter 2022 for the id;
    • enter enp2s0 for the link;
    • set the IP address to 10.10.10.2/24 (Ubuntu requires CIDR notation);
• to save the configuration, press Ctrl+s;
• close the text editor by pressing Ctrl+x;
• using your SSH client, run the following commands:
  • to check the configuration file created above:
     

    netplan generate

  • if no errors are returned, the file has been written correctly and you can apply the configuration using the following command:
     

    netplan apply

  • check the configuration using the following command:
     

    ip a

  • the output will show enp2s0 as the public network and vlan2022@enp2s0 as the virtual network adapter dedicated to the SWaaS service.