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Network configuration

IPv6 setup​

Upon request we provide you with a /64 IPv6 prefix for all our Root Dedicated Server and Root CloudVM products. You will receive one prefix per server and be able to choose the preferred addresses out of this prefix.

Autoconfiguration neither by Stateless address autoconfiguration nor by DHCPv6 is supported in our network. Please configure the desired IPv6 address(es) manually.

The IPv6 gateway has the address of fe80::1 on each prefix. This address out of the link-local prefix allows for a setup where no address out of your prefix needs to be assigned to the network infrastructure.

Netplan​

Open /etc/netplan/55-interfaces.yaml in your preferred editor:

vi /etc/netplan/55-interfaces.yaml

Extend your ethernet definition with IPv6:

network:
  version: 2
  ethernets:
    ens3:
      dhcp4: false
      dhcp6: false
      accept-ra: false
      match:
        macaddress: 1f:2f:3f:4f:5f:6f
      addresses:
      - 198.51.100.10/24
      - 2001:0DB8:9999:9999::1/64
      routes:
      - to: 0.0.0.0/0
        via: 198.51.100.1
      - to: "::/0"
        via: fe80::1

Before applying the Netplan configuration, it’s important to test it to ensure there are no syntax errors:

netplan try

If the configuration test is successful, apply the Netplan configuration to activate the vlan interface:

netplan apply

And verify with:

ip -6 addr show vlan<VLAN-ID>

ifupdown (legacy)​

Please use Netplan if possible. This is written only for the sake of completeness!

Open /etc/network/interfaces in your preferred editor:

vi /etc/network/interfaces

Add an IPv6 configuration like this (adjust the interface name according to your system!):

iface ens3 inet6 static
    address 2001:0DB8:9999:9999::1
    netmask 64
    gateway fe80::1

And restart your networking:

systemctl restart networking

VLAN / Port for internal network​

If you have multiple root servers in the same room and want to exchange private/sensitive traffic between them, VLAN is your option and a good alternative to a VPN.

Prerequisites​

Ensure the following package is installed:

apt install vlan

And check if the bond0 network interface exists:

ip addr show bond0

Attention: Not all systems have bondig enabled!
In case you're missing a bond0 interface, please contact our support!

If everything is prepared, proceed with Netplan (recommended) or ifupdown (legacy).

Netplan​

Open /etc/netplan/55-interfaces.yaml in your preferred editor:

vi /etc/netplan/55-interfaces.yaml

Add a VLAN definition like this:

  vlans:
    vlan<VLAN-ID>:
      id: <VLAN-ID>
      link: bond0
      addresses:
        - 192.0.2.10/24

A complete netplan configuration looks like this:

---
network:
  version: 2
  renderer: networkd
  bonds:
    bond0:
      interfaces:
        - ens3
        - ens4
      dhcp4: false
      dhcp6: false
      accept-ra: false
      addresses:
      - 198.51.100.10/24
      macaddress: 1f:2f:3f:4f:5f:6f
      routes:
      - to: 0.0.0.0/0
        via: 198.51.100.1
      parameters:
        mode: 802.3ad
        transmit-hash-policy: layer3+4
        lacp-rate: fast
        mii-monitor-interval: 100
  ethernets:
    ens3:
      dhcp4: false
      dhcp6: false
      accept-ra: false
    ens4:
      dhcp4: false
      dhcp6: false
      accept-ra: false
  vlans:                              # VLAN configuration starts here!
    vlan<VLAN-ID>:
      id: <VLAN-ID>
      link: bond0
      addresses:
        - 192.0.2.10/24

Before applying the Netplan configuration, it’s important to test it to ensure there are no syntax errors:

netplan try

If the configuration test is successful, apply the Netplan configuration to activate the vlan interface:

netplan apply

And verify with:

ip addr show vlan<VLAN-ID>

For further information, please also have a look at: man netplan

ifupdown (legacy)​

Please use Netplan if possible. This is written only for the sake of completeness!

Install ifupdown, if not already installed:

apt install ifupdown

Open /etc/network/interfaces in your preferred editor:

vi /etc/network/interfaces

Add a VLAN configuration like this:

# interface vlan<VLAN-ID>
auto vlan<VLAN-ID>
iface vlan<VLAN-ID> inet static
    vlan-raw-device bond0
    address <IP-Address>
    netmask <NETMASK>

And restart your networking:

systemctl restart networking

For further information, please also have a look at: man vlan-interfaces