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Date: Fri, 04 Feb 2011 13:13:52 +0100
From: Damien Fleuriot <ml@my.gd>
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Subject: link aggregation - bundling 2 lagg interfaces together
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Hello list,



I have a firewall with 2x Intel pro dual port cards.

On Intel A , port 1 goes to switch 1, port 2 goes to switch 2
On Intel B , port 1 goes to switch 1, port 2 goes to switch 2


I have created the following 2 lagg devices using LACP:

lagg0 = A1 + B1
lagg1 = A2 + B2

This works fine.


Now, what I had in mind was creating a lagg2 device using lagg0 and
lagg1 with failover.

That would provide redundancy in case of a switch failure.

ifconfig won't let me though:

# ifconfig lagg2 laggproto failover laggport lagg0 laggport lagg1
ifconfig: SIOCSLAGGPORT: Invalid argument



I suppose it's not possible to aggregate lagg interfaces ?

That would shatter my dreams :(