LTM trunk to seperate switches?

should just be a matter of shutting the link to one of the switches to see if the failover works seamlessly.i think you may need ha group configuration to failover when one interface is down.

 

 

Configuring HA groups

 

http://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/tmos_management_guide_10_1/tmos_high_avail.html