LARTC - Mar 2005 - Round Robin

Hi,

I dont really know if this is the right place to post this question..If its 
not pl let me know...

Here is what i am looking for. I have two machines with two ethernet cards.One 
of these machine has an ftp server(vsftpd). When i request a file from the 
first machine i want that machine be able to start an ftp, and when each of 
the packet of the file go to one of the ethernet cards, i want it to go in a 
RoundRobin fashion. i.e the first packet for example from eth0 and the second 
packet from eth1, and third packet from eth0 again and forth from eth1 and so 
on...

what should i do to achieve this kind of scheduling in linux. Any help will be 
highly appreciated.

Thanks

Muhammad A. Imam

Witaj M.,

W Twoim liście datowanym 12 marca 2005 (17:14:00) można przeczytać:

The scenario you''re describing looks similar to bonding devices (via
bonding module) which is used for HA or load balancing situations.
Usually to connect to the managed switch for better (more bandwidth)
performance.

The other end must do the same.

From working setup:
modprobe bonding mode=balance-rr
ip link set dev eth0 down
ip link set dev eth1 down
ip link set dev bond0 up
ifenslave bond0 eth0 eth1

and you have to make bond0 an outgoing interface instead of eth0 eth1

And you will have approx. twice the bandwidth of a single device.
> Hi,
> I dont really know if this is the right place to post this question..If its
> not pl let me know...
> Here is what i am looking for. I have two machines with two ethernet
cards.One
> of these machine has an ftp server(vsftpd). When i request a file from the
> first machine i want that machine be able to start an ftp, and when each of
> the packet of the file go to one of the ethernet cards, i want it to go in
a
> RoundRobin fashion. i.e the first packet for example from eth0 and the
second
> packet from eth1, and third packet from eth0 again and forth from eth1 and
so
> on...
> what should i do to achieve this kind of scheduling in linux. Any help will
be
> highly appreciated.
> Thanks
> Muhammad A. Imam
> _______________________________________________
> LARTC mailing list
> LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc


-- 
Pozdrowienia,
 Robert Kurjata

Hi Rob,

Thanks alot man for this solution... But,

Here is the other part... Can i leave the ip link set dev eth0 up(eth0 and 
eth1 still up) with bond0 also up. Thats because i have some other traffic 
already using eth0 and eth1 separately and i want them to keep using them as 
they are... so in other words i need the round robin double speed only for 
this ftp application.

Appreciate your help alot.

Muhammad
>===== Original Message From Robert Kurjata <rkurjata@ire.pw.edu.pl>
====>Witaj M.,
>
>W Twoim liœcie datowanym 12 marca 2005 (17:14:00) mo¿na przeczytaæ:
>
>The scenario you''re describing looks similar to bonding devices
(via
>bonding module) which is used for HA or load balancing situations.
>Usually to connect to the managed switch for better (more bandwidth)
>performance.
>
>The other end must do the same.
>
>From working setup:
>modprobe bonding mode=balance-rr
>ip link set dev eth0 down
>ip link set dev eth1 down
>ip link set dev bond0 up
>ifenslave bond0 eth0 eth1
>
>and you have to make bond0 an outgoing interface instead of eth0 eth1
>
>And you will have approx. twice the bandwidth of a single device.
>
>> Hi,
>
>> I dont really know if this is the right place to post this question..If
its
>> not pl let me know...
>
>> Here is what i am looking for. I have two machines with two ethernet 
cards.One
>> of these machine has an ftp server(vsftpd). When i request a file from
the
>> first machine i want that machine be able to start an ftp, and when
each of
>> the packet of the file go to one of the ethernet cards, i want it to go
in
a
>> RoundRobin fashion. i.e the first packet for example from eth0 and the 
second
>> packet from eth1, and third packet from eth0 again and forth from eth1
and
so
>> on...
>
>> what should i do to achieve this kind of scheduling in linux. Any help
will
be
>> highly appreciated.
>
>> Thanks
>
>> Muhammad A. Imam
>
>> _______________________________________________
>> LARTC mailing list
>> LARTC@mailman.ds9a.nl
>> http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
>
>
>
>--
>Pozdrowienia,
> Robert Kurjata

M. A. Imam wrote:
> Hi Rob,
> 
> Thanks alot man for this solution... But,
> 
> Here is the other part... Can i leave the ip link set dev eth0 up(eth0 and 
> eth1 still up) with bond0 also up. Thats because i have some other traffic 
> already using eth0 and eth1 separately and i want them to keep using them
as
> they are... so in other words i need the round robin double speed only for 
> this ftp application.
You may be able to do it with the help of netfilter''s patch-o-matic Nth
and ROUTE.

Andy.