On Tue, 18 Sep 2012 15:40:24 +0000, Pietro Paolini wrote:

> Hi all,

Hi :-)

(people, avoid sending html formatted posts, they are really annoying to 
deal with...)

> My goal is to simulate more than one IP interface using just a physical
> interface, for do that I tried using this alias
> 
> Ifconfing ethX:1 <IP>

More information about virtual interfaces can be found here:

http://www.debian.org/doc/manuals/debian-reference/ch05.en.html#_the_virtual_interface
http://wiki.debian.org/NetworkConfiguration#Multiple_IP_addresses_on_One_Interface

> But when I try to send a packet over that interface I see the IP source
> the same as the original, and real,  Ethernet interface. 

That sounds logic because there is only "one" real interface handling the 
traffic.

> Then I tried to use TAP interface but I was unable to "link" them with
> my physical one, I notice them can communicate each others but can not
> ping (ping -I tap0  <ip real IF>) the original one. It is still valid
> if I create a bridge with all them.
> 
> I would like avoid to install many Virtual Box as I need but what I want
> is exactly what it do: build a new virtual interface and bridge it with
> a real one in order to have more IP interface attached at one physical.
> 
> Any suggestion ?

Mmm... I'm not sure to have properly understood your main goal here. Can 
you please detail what's what you want to get?

Greetings,

-- 
Camaleón


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