Comments on: How to bind a range of IP’s in Debian / Ubuntu Linux

By: Douglas

Douglas — Sun, 12 Jun 2011 20:40:46 +0000

Not sure, but I just tried to add 5000 ipv6 ips to one interface, but got out of memory message after 4091 IPs

By: conan

conan — Wed, 02 Jun 2010 17:04:12 +0000

it seems that we can bind these ip to loopback, such as lo:1 lo:2 ?

By: Jesse

Jesse — Tue, 11 Aug 2009 01:15:29 +0000

Umm… yeah, so why is the netmask 255.255.255.248 when the client IPs are .1-3 and the gateway is at .254? Would you not need a netmask of 255.255.255.0 to keep the client IP’s and gateway in the same subnet??

By: Gagan Brahmi

Gagan Brahmi — Sat, 16 May 2009 13:26:04 +0000

Hey Vivek,

I have a related question. Do you know what is the maximum limit of IP addresses a single NIC can have in linux?

By: Joseph Bloe

Joseph Bloe — Mon, 15 Dec 2008 01:29:16 +0000

Actually, what you have described is how to create a virtual interface on a NIC. A side effect of doing this is an IP alias is also automatically created. These are not the same things.

As an aside, I have several servers with several aliased IP addresses on the NICs. There are NO virtual interfaces (e.g. eth0.2, eth1:3, etc).

By: vivek

vivek — Tue, 18 Nov 2008 07:30:30 +0000

Clint,

title is correct and this is the only way to add ranges. Redhat/centos has special file for this purpose. However, you can write a shell script to add IP in ranges. Try something as follows from /etc/rc.local:

for ip in {1..254}; do echo ifconfig eth0:${ip} 192.168.1.$ip netmask 255.255.255.248 up; done

HTH

By: Clint

Clint — Tue, 18 Nov 2008 04:54:20 +0000

This posting title is a bit misleading, it doesn’t tell you how to setup a range, it tells you how to setup multiple ip addresses individually.

Is there any way to say bind all ip’s in a 192.168.1.0/24 range, starting with eth0:0 or some such? Something without having to have 4 lines per ip address.

In RedHat its a special file called ifcfg-eth0-range0 and has some special parameters but allows you to bind hundreds of ip addresses with just a few lines

By: redsonic

redsonic — Mon, 09 Jun 2008 09:38:33 +0000

Hi,

Thank you a lot for this very nice howto.

It was very helpful

By: Darkall

Darkall — Thu, 31 Jan 2008 04:09:30 +0000

Yes, he meant to type iface eth0:1 instead of iface eth0:0 :) He typo’d

By: Stephen G

Stephen G — Wed, 30 May 2007 02:56:32 +0000

Did you possibly make a type for the 192.168.1.3 assignment?

shows:
iface eth0:0 inet static
address 192.168.1.3
netmask 255.255.255.248
gateway 192.168.1.254

should be (?):
iface eth0:1 inet static
address 192.168.1.3
netmask 255.255.255.248
gateway 192.168.1.254