Additional IPs

The additional IP addresses have been replaced by failover IPs

You may use the information below ONLY if you still have one of the old additional IPs.

Configuration of the additional IPs

Each additional IP is linked to a principal IP, it is therefore an alias of the principal IP of your server.

The additional IPs are divided into /27 blocks, you have to find the details of your configuration (address/netmask/broadcast) by using the command iptraf - or by clicking on the address you want to configure in your management console.

sd-276:~# ipcalc 88.191.200.44/27
Address:   88.191.200.44        01011000.10111111.11001000.001 01100
Netmask:   255.255.255.224 = 27 11111111.11111111.11111111.111 00000
Wildcard:  0.0.0.31             00000000.00000000.00000000.000 11111
=>
Network:   88.191.200.32/27     01011000.10111111.11001000.001 00000
HostMin:   88.191.200.33        01011000.10111111.11001000.001 00001
HostMax:   88.191.200.62        01011000.10111111.11001000.001 11110
Broadcast: 88.191.200.63        01011000.10111111.11001000.001 11111
Hosts/Net: 30                   Class A

You are now able to configure the alias in your network configuration file, for more information you may check the example of a configuration file below or in the documentation of your favorite distribution.

Example of the network configuration on Debian/Ubuntu:

sd-276:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
        address 88.191.12.37
        netmask 255.255.255.0
        network 88.191.12.0
        broadcast 88.191.12.255
        gateway 88.191.12.1

auto eth0:0
iface eth0:0 inet static
        address 88.191.200.44
        netmask 255.255.255.224
        network 88.191.200.32
        broadcast 88.191.200.63

auto eth0:1
iface eth0:1 inet static
        address 88.191.200.45
        netmask 255.255.255.224
        network 88.191.200.32
        broadcast 88.191.200.63

Example of the configuration for Mandriva:

sd-276:~# cat /etc/sysconfig/network-scripts/ifcfg-eth0:0
DEVICE=eth0:0
BOOTPROTO=static
IPADDR=88.191.200.44
NETMASK=255.255.255.224
ONBOOT=yes
METRIC=10
MII_NOT_SUPPORTED=yes
USERCTL=no
IPV6INIT=no
IPV6TO4INIT=no
PEERDNS=yes

sd-276:~# ifup eth0:0