Many of our problems with large-scale outages relate to the usage of the BGP (Border Gateway Protocol), and which can also lead to major security issues where traffic is routed through malious routes. But, it doesn’t have to be like this, and OSPF provides an excellent alternative.
BGP
As with OSPF, BGP is an exterior gateway protocol, and allows for the routing of data between Autonomous Systems. The routing descision is based on a number of options including the weight (the highest locally derived preference number); the path origin (network or aggregate); the shortest AS path to the destination network; and the preferred path. While BGP has low computing resource requirements as compared with OSPF, it sometimes struggles to converge the overall selection of routes. You can read more here:
OSPF
The OSPF (Open Shortest Path First) is an open, non-proprietary standard which was created by the IETF (Internet Engineering Task Force), a task force of the IAB. It is a link-state routing protocol and is thus able to maintain a complete and more current…
