hi i configure on my lab , two routers R1 and R2 directly connected and R1 is Connected RED network , and R2 connected in Blue Network the Each Network have a lan switch , i tried to ping from R2 to R1 connected Pc i can ping the IP address but i cant ping the Switch IP
i configure R1 to Next hope Switch on Router on Stick attached the photo configuration as follows can any one help me why i cant access the switch but i can access the pc which same subnet

Thanks