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EIGRP

1. Back up routes (fast convergence)

2. Simple configuration

3. Flexibility in Summarization

4. Unequal Cost Load Balancing

5. Combine best of Distance Vector and Link State

TABLES

NEIGHBOR TABLE = lists adjacent routers

TOPOLOGY TABLE = lists all possible routes including feasible successors

ROUTING TABLE = lists the successor routes

TERMINOLOGY

FEASIBLE DISTANCE (FD)

ADVERTISED DISTANCE (AD)

SUCCESSOR = PRIMARY ROUTES

FEASIBLE SUCCESSOR = BACKUP ROUTES

ACTIVE ROUTE = ACTIVELY LOOKING FOR A BACKUP

PASSIVE = ROUTE IS STABLE

****TO BE CONSIDERED A FEASIBLE SUCCESSOR, THE AD MUST BE LESS THAN THE FD OF THE SUCCESSOR****

NEIGHBOR RELATIONSHIPS

HELLO = FORMS RELATIONSHIP 224.0.0.10

UPDATE = SENDS UPDATES

QUERY = ASKS ABOUT ROUTES

REPLY = RESPONSE TO A QUERY

ACK = ACKNOWLEDGES THE UPDATE, QUERY, AND REPLY MESSAGES

EIGRP METRICS

BANDWIDTH (K1)

DELAY (K3)

RELIABILITY (K4 AND K5)

LOADING (K2)

MTU

EIGRP