The cisco doc says that when split horizon is enabled (which is the default), then RIP will NOT send any ad about summary addresses.
What is the reason why this behavior has been established ? I really don't see what we want to avoid by not sending these ad. If I manually configure an interface sumarry address, I know where the subnet is, and I know there will be no loop. But I still don't want to disable split horizon, which would be too dangerous to do.