For the millionth time, you can't just delete the existing sysctls. That is a user visisble interface. Instead, you have to make them at least appear to select a single congestion control algorithm as I stated in the following posting: http://marc.theaimsgroup.com/?l=linux-kernel&m=110909973530321&w=2 - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html