I remember being told that this wasn't inherently possible, but that the way 
you do it was to do all four as a single LACP instance. 

I don't remember the specifics, but the practical upshot was that you'd get one 
switch's LACP would negotiate two ports, one would negotiate the other two, and 
Linux would just pick one of the two pairs that were negotiated to use. And if 
one of the links broke to the point where there was only one link active, then 
the 2-link LACP side would work.

... or something.

D


On Jan 30, 2013, at 3:38 PM, Andrew Hume <and...@research.att.com> wrote:

> is it possible to do two levels of binding under RHEL?
> we want to do something like:
> 
> ec0 = bond rr eth0 eth1
> ec1 = bond rr eth2 eth3
> poot = bond active-backup ec0 ec1
> 
> that is, active-backup over 2Gbps etherchannels.
> the documentation is unclear but hints this may be possible.
> anyone know?
> 
> -----------------------
> Andrew Hume
> 623-551-2845 (VO and best)
> 973-236-2014 (NJ)
> and...@research.att.com
> 
> 
> 
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