I have one SG300-28SFP and 27 SV350 switches running several spanning tree segments. Is there a free software program that will give me a graphical display of my network and status of the spanning tree segments? If not free is their a piad software program that supports these switches? I installed the old cisco configuration assistant which supports the SG300 but does not support the SV350 switches. I also installed Cisco Network Assistant (2014 is latest releae) and that does not see to support the SG300.