cisco sg300-28 redundancy setup

[jetani.jignesh]

i have two cisco sg300-28 switch and 3 plc  which i have connected as show in figure 

problem i face is not getting continous ping to plc-3 

if  cut cable from switch A---->plc-1 it will take 35 second to choose route via switch B

vice versa if cut B---> plc3 it will take same time

for make quick without packet drop how to configure my switch for quick switching 

 

[Mark Malone]

If not already done you can set these switches to rstp under spanning-tree that should speed up convergence when you loose a link

set your pc/phone/server ports as edge in stp as well

[jetani.jignesh]

dear sir 

i have try still same thing