Hot Standby Router Protocol for a Private University in Malaysia

In the digitized university environment most of the works and activities done by a network-based process which will be adapted to monitor all the activities to be processed and stored in such datacenter, from that particular point, how to maintain connectivity and to prevent the system from any vulnerability? Is there any techniques or protocols that enhance and guarantee stability? If the primary gateway becomes inaccessible, it might lead to a connectivity issues and that might be very disturbing especially inside a university campus that uses digitalized system to perform their operations, and other education purpose.