EIGRP Configration (Cisco Property Protocol) | InfoZonePK

EIGRP (Enhanced Interior Gateway Routing Protocol)

Importance:

  1. Biggest advantage of EIGRP is backup route
  2. Simple in configuration
  3. Flexibility in Summarization
  4. Unequal Cost Load balancing advantage
  5. Combination of distance vector and link state protocol and Cisco call it Hybride protocol
  6. Support multiple Routing protocol

EIGRP Tables and Terminology:

 

EIGRP made three tables in database

  1. Neighbor Table
  2. Topology Table
  3. Routing Table

Terminology:

  1. Feasible distance (FD) (Total distance destination)
  2. Advertised distance (AD) (Total distance from source neighbor to distance)
  3. Successor (That is the primary path to reach the destination)
  4. Feasible Successor (That is the backup path of the destination)
  5. Active Route (Active when primary path is disable)
  6. Passive Route (Its mean that primary path is stable)

* To be considered a feasible successor, the AD must be less than thr FD of the successor

Verification Command:

R1#show ip eigrp toplogu

Visiting the Friendly EIGRP neighbor (EIGRP packet information)

  1. Hello: Create Relationship with the neighbor
  2. Update: Send updates (not complete routing table only send update)
  3. Query: Ask about Routes to neighbors
  4. Reply: Response to Query
  5. Ack: Acknowledge the update, Query and reply

Understand EIGRP metric Calculation:

What us metric? It means who good that is?

  1. Bandwidth
  2. Delay
  3. Reliability
  4. Loading
  5. MTU

Bandwidth and delay is statically and reliability, loading and MTU is dynamically configure and never get these in

Metric calculation:

Real (Default) = 256*(BW +`Delay)

BW = 10 ^ 7BW

Delay = Delay in Microseconds