m1000e DRAC slow

Hi, 

I have 5 Dell m1000e chassiswith 16 blades each.

When I need to use the DRAC to manage the blades, everything is SO SLOW... it can take 30 seconds to a minute for each click.

Ex: I'M in the cassis overview, I click on one blade it takes 40 seconds. I then click on Launch DRAC GUI it takes 40 seconds to show the ssl warning, I click on continue and another 40 seconds... to get to the GUI.. 

any idea?

The DRACs of the chassis and blades are on the same  isolated VLAN.