Combine two ethernets?

[Xan]

En/na Robert Collins ha escrit:
> On Sun, 2006-08-27 at 11:23 +0200, Xan wrote:
>   
>> I have two network interfaces: eth0 and eth1.
>> I just want to know if it's possible to combine two interfaces for 
>> downloading (and uploading) at the same time in the two interfaces.
>> That 
>> is, can ubuntu use the two interfaces at the same time?
>>
>> For example I think:
>> a) ubuntu automatically uses the less used interface. If it's
>> possible, 
>> we could have two balanced interfaces (equal traffic bandwitth)
>> b) we could specify which program uses what interfaces. For example,
>> use 
>> bittorrent in eth0 and web browsers in eth1....
>>
>> And the question is: if it's possible, is it _easy_ (for desktop
>> users)?
>>     
>
> As far as a) Its very possible see the excellent Linux Advanced Routing
> and Traffic Control HOWTO: http://lartc.org/.
>
>
> The extent to which its possible is largely dependent on non-Ubuntu
> factors - ISP or company network configuration etc. [unless you are
> actually talking about parallel-http/ftp range fragment downloading,
> which is purely application configured, and nothing to do with the
> network as such.
>
> For b), yes, with limits - its possible to tag a traffic flow, and then
> use that in routing and traffic mangling rules to force it out a
> specific interface. Things like bittorrent which have dynamic ports are
> somewhat harder to do this too, but its still possible with sufficient
> effort.
>
> And no, its not easy, generally not for anyone, let alone 'desktop
> users'.
>
> I hope that anyone who does set out to do make this easy does so with an
> awareness of the complexity that exists inherently in such tasks, and
> tries to find ways to reduce that - making it easier for server admins
> to achieve would be a good first step in making it easier for 'desktop
> users' to do.
>
> -Rob
>
>   
Well, thanks for pointing this resources and clarify me with you 
explanations.

Regards,
Xan.