[LARTC] is round-robin on interface aliases possible?

[LARTC] is round-robin on interface aliases possible?

[Stanislaw Pusep]

Hello, I'm new to the list and iproute2 itself. I was searching for a 
way to simultaneously use several IPs on the *same network interface* 
for outbound traffic. Let me explain: I have eth0 interface to which I 
set 2 IP addresses; 192.168.0.1 and 192.168.0.2. Then I want to connect 
to Internet through 192.168.0.254 gateway using round-robin between 
those 2 addresses. The iproute2 usage that best fits my needs is 
following: http://lartc.org/howto/lartc.rpdb.multiple-links.html
But I was unable to get it working, as it supposes I have 2 *interfaces* 
  while I have only 1 interface with aliases. I'm simply unable to set 
the same gateway on both IPs as it seems to be per-device setting. I am 
aware that iptables is able to do it with:
iptables -t nat -A POSTROUTING -o eth0 -j SNAT -to-source 
192.168.0.1-192.168.0.2
This actually doesn't fits my needs as it only applies to masquerade 
networks. Any suggestions?
Thanks for attention!
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Re: [LARTC] is round-robin on interface aliases possible?

[Tomasz Chilinski]

On Fri, 15 Oct 2004 20:02:05 -0300, Stanislaw Pusep wrote
> Hello, I'm new to the list and iproute2 itself. I was searching for 
> a way to simultaneously use several IPs on the *same network 
> interface* for outbound traffic. Let me explain: I have eth0 
> interface to which I set 2 IP addresses; 192.168.0.1 and 
> 192.168.0.2. Then I want to connect to Internet through 
> 192.168.0.254 gateway using round-robin between those 2 addresses. 
> The iproute2 usage that best fits my needs is following: 
> http://lartc.org/howto/lartc.rpdb.multiple-links.html But I was 
> unable to get it working, as it supposes I have 2 *interfaces*   
> while I have only 1 interface with aliases. I'm simply unable to set 
> the same gateway on both IPs as it seems to be per-device setting. I 
> am aware that iptables is able to do it with: iptables -t nat -A 
> POSTROUTING -o eth0 -j SNAT -to-source 192.168.0.1-192.168.0.2 This 
> actually doesn't fits my needs as it only applies to masquerade 
> networks. Any suggestions? Thanks for attention!

You can use nth and connmark extensions (patch-o-matic from
http://netfilter.org) with two route tables. This way you can get load
balancing for ip dialogues.

--
Kind regards,
Tomasz Chilinski

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