Re: Network Multipathing

> On Tue, 22 Apr 2003, t0m wrote:
> 
> > I'm running one box with rh 7.2 with 2 network card inside. I'd like to have
> > something like on Solaris is IP Multipathing.
> > There are if1 and if2 (interfaces) connected to 2 different switches.
> > if1 -> sw1
> > if2 -> sw2
> > All network traffic go through sw1 to if1 and back and if something will
> > happen with (anything with cables, sw1 etc..) I'd like to change that 
traffic
> > through if2 -> sw2?
> > 
> > Does something like this exists or anything what could help?
> 
> /sbin/ip does things like these, and tons more:
> 
> gv /usr/share/doc/iproute-*/ip-cref.ps
> 
> (you need to have the iproute rpm installed, of course)
> 
> Btw, why _all_ the traffic should go through one interface when you have two?
> Wouldn't it be more useful to have both cards active all the time, and route
> traffic to the working one only in case the other had problems?
> Just an idea...
> 
> Ant9000
> 

Solved.
The name for this under linux is bonding. You need to compile it like a module. 
More information you can find 
$KERNEL_SOURCE/Documentation/networking/bonding.txt you can find more 
information in section High Availability.
On Sun LX-50, linux box, with Sun Linux 5.0 (Red Hat 7.2) modules bonding 
doesn't support miimon option which is a key thing to do this "multipathing". 
Kernel is 2.4.9-31enterprise.

tomas