Hello,
Yes, supports stacking using SFP+ ports.
Any models of the S5735-L can set up a stack. Any models of the S5735S-L can set up a stack. Any models of the S5735S-L-M can set up a stack. The S5735S-L can set up a stack with the S5735S-L-M. The S5735-L cannot set up a stack with the S5735S-L and S5735S-L-M.
Ports of two different types on a switch can be configured as stack ports simultaneously, except 1 Gbit/s and 10 Gbit/s ports. Each logical stack interface can contain only ports of the same rate.Log into the web NMS and choose Configuration Area > Advanced Services> Stack.
Hope to help you!