I have noticed in the 7609 with IOS of c7600s72033-advipservices-mz.122-33.SRC4.bin that the "QOS Pre-Classify" command is missing as a option off the GRE tunnels. How does the 7609 handle DSCP values when it encapsulations a packet before it send it on a GRE tunnel that might have QOS configured on the exit interface?