3500yl K.15.10.0009 - dt-lacp switch to switch redundancy

[saint-kid]

Dear Members,

I have 1 pair of 3500yl running in switch interconnect mode

Software version

Image stamp:    /ws/swbuildm/K_rel_irvine_qaoff/code/build/btm(swbuildm_K_rel_irvine_qaoff_rel_irvine)
                Feb  8 2013 12:09:55
                K.15.10.0009
                7
Boot Image:     Primary

I am interested to know if the other end of these 2 switches is a procurve 2910al, what is correct setting on the trunk for both switches?

dt-lacp on the 3500 and lacp on the 2910al?

If the other end is another pair of 3500yl, do i set dt-lacp on both pairs of 3500yl?