Well i'm using active - passive with test addresses on 11.1
I have tested LACP with IPMP over 2 x LACP (active-passive), which works fine.
Other stuff did not pass
physical tests (unplugging or port shut) on current patchset i'm running. Stuff like transitive probing and active active ipmp.
Stuff gets fixed tho, but having to make test like that for every update ..... not so enterprise
.
DLMP - didn't try, but i've have heard that it works in newer releases.
Regards
Peasant.