Create Date: Sep 7 2013 2:48AM
Chris, Two-tier MLAG definitely works.
Check this implementation guide
https://www.dropbox.com/s/pb4qsdzis05xg9y/SVC%20Tech%20DC%20Implementation%20Guide%20-%20Two%20Tier%20MLAG%20with%20EXOS%2012.6%20and%20Physical%20Servers%20v1.pdf (from Daniel_Flouret)