Why EIGRP authentication is required in the Industry ?
Authentication is required to prevent unknown routers to participating in eigrp operation and form neighborship.
EIGRP authentication configuration prevents intruder from establishing fake EIGRP adjacency. The consequence of fake adjacency can be for example CPU over utilization or routing table poisoning.
To provide extra security on router. so that only authorized neighbor can share their information to router .by implementing EIGRP Authentication we prevent the unknown routers can not make fake EIGRP neighborship…
To prevent the unauthorizes access or participate from another routers.