Problem S4112T with FI 6248

Hi all,

I had a problem with two S4112T connected with two FI 6248 where UCS servers connected.

VLT is configured, management ports are used as backup links, 

Two hosts connected to each   S4112T  trying to ping the VM server, one ping successfully other not.

Is there any recommendation on how to configure Dell switches when connected to FI?

Previously there was Nexus with vPC connected to FI and it was working.

BR,