We have two m1000e blade chassis, each with 2 m8024-k switches. We are using this document (see link below) to connect them to four cisco 5k's.
http://en.community.dell.com/techcenter/extras/m/white_papers/20065722/download.aspx
We chose to use Scenario 3 (page 15) in the document. The first Scenario (Scenario 1, page 5), shows enabling spanning tree before setting up the LACP on the m8024-k, but no other scenarios in the document do that. So if we are using Scenario 3 we would not do the enabling of spanning tree, is this correct?