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I would like some insights and explanations on the aggregate
capabilities of the agr(4) device. As I understand it, -link0 (dash)
mode does LACP and should be compatible with manageable network
switches. Does the link0 (no dash, load-balance with some warning about
frame ordering in the manual) works with LACP too? Is this mode also
supposed to work with network hardware vendors? In what cases should
one use the one or the other? Any of those is not supposed to work with
non manageable switches, right?
I tested the default -link0 (dash) mode between two netbsd nodes, and it
didn't really work out of the box, I had to manually recreate the
interface on one of the nodes to establish the link and ping, even
though the '0x3<COLLECTING,DISTRIBUTING>' came right up. Also once the
link seemed to be alright, when I physically disconnected *one* of the
wires, I lost the connection. So I wasn't very successful with this,
could be my mistake though, I should try again. I didn't try to
validate the link0 (w/o the dash) the same way, but it seemed to me that
I also had to reinitialize the agr0 interface on one of the two nodes to
make it work.
On the other hand, as for the link1 mode, I am happily using it on my
home network on two netbsd hosts, both connected to a non manageable
switches, and everybody -- even the nodes with no aggregates -- pings.
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