I would like to confirm the following informatino below.
It is recommended to avoid implementing UDLD in aggressive mode as well as fast UDLD on the Cisco
Catalyst switches deployed with redundant supervisor modules.
According to this information, I think the UDLD mode above is not reconmeded the redundant SUP in one chassis.
However how about using Basic-VSS (not Quad-VSS) ? Is it also recomended to avoid UDLD aggressive mode and Fast UDLD?