While trying to setup ipsec tunnel from a dynamic ip to a static one using cisco routers I have been running into a problem. I am able to ping R1 from R2 and vice versa, but I can't ping R1 from PC2. Show crypto session states that the connection is active. Oddly enough for a gew seconds I was able to ping PC1 to PC2 but after a few seconds of seemingly not changing anything it just stopped working.
To better illustrate the setup I prepared a picture.