Configure IP Range Ubuntu Server

Comments

• vapornode Member

  December 2013

  As far as I know you have to manually input each IP in the interfaces file however this approach may be slightly faster:

  auto eth0
  allow-hotplug eth0
  iface eth0 inet static
      address 192.168.1.1
      netmask 255.255.255.0
      gateway 192.168.1.254
      up   ip addr add 192.168.1.2/24 dev eth0 label eth0:0
      down ip addr del 192.168.1.2/24 dev eth0 label eth0:0
      up   ip addr add 192.168.1.3/24 dev eth0 label eth0:1
      down ip addr del 192.168.1.3/24 dev eth0 label eth0:1
  
• Janevski Member

  December 2013 edited December 2013

  @agoldenberg Or if You need to initiate the interfaces only for the current session via ifconfig, a bit bogus example:

  ifconfig eth0 10.0.0.1/8 up
  ifconfig eth0:0 172.16.0.1/12 up
  ifconfig eth0:1 192.168.0.1/16 up
  

  Edit: Whoops sorry didn't read the whole thing, about the manual part, so my post is pretty much pointless, okay anyhow... as @fizzyjoe908 said.

  PS: You could put the ifconfig in /etc/rc.local, and achieve the same thing.
• agoldenberg Member, Host Rep

  December 2013

  Yeah I guess I'm just going to configure them 1 by 1. It's too bad ubuntu doesn't have a way of configuring a range simply.
• tux Member

  December 2013

  @agoldenberg said:
  Yeah I guess I'm just going to configure them 1 by 1. It's too bad ubuntu doesn't have a way of configuring a range simply.

  I think that you should write script for this.
• Rallias Member

  December 2013 edited December 2013

  for i i n {2..255};
  do
       echo "auto eth0:$i" >> /etc/network/interfaces
       echo "iface eth0:$i inet static" >> /etc/network/interfaces
       echo "    address 10.0.0.$i" >> /etc/network/interfaces
       echo "    netmask 255.255.255.0" >> /etc/network/interfaces
  done
  service networking restart
  

  It's not "manual", but it is just as bad.
• gbshouse Member, Patron Provider

  December 2013

  Ip addr add dev eth0 1.2.3.0/24
• Rallias Member

  December 2013

  gbshouse said: Ip addr add dev eth0 1.2.3.0/24

  You realize with the ip command, /24 refers to the appropriate netmask, not the range of address's to add, right?
• gbshouse Member, Patron Provider

  December 2013

  Works for us, note the .0 part