The "Foundation Summary" section of each chapter lists the most important facts from the chapter. Although this section does not list every fact from the chapter that will be on your exam, a well-prepared candidate should, at a minimum, know all the details in each "Foundation Summary" before going to take the exam.
The key features of EIGRP include
Neighborship and reliable incremental updates
Neighbor discovery and recovery
EIGRP uses five types of packets to communicate:
EIGRP uses a sophisticated metric that considers bandwidth, load, reliability, and delay. When default constant values are taken into consideration, the equation simplifies to
Additional EIGRP advantages include
Multicast Addressing for Updates
Unequal-Cost Load Sharing
EIGRP builds and maintains three tables:
To become a neighbor, the following conditions must be met:
The router must hear a Hello packet from a neighbor.
The EIGRP autonomous system must be the same.
K-values must be the same.