The document is a presentation on EIGRP that introduces the presenters and provides an overview of the routing protocol. It defines EIGRP as an enhancement of IGRP that uses hello, update, query, reply and acknowledgement packets to discover neighbors and propagate routing information. It also summarizes that EIGRP uses bandwidth, delay, load, and reliability metrics to calculate the best path, with the formula using reference bandwidth, interface bandwidth and delay to determine reported and feasible distances.

1. Presentation On EIGRP
Welcome To Our Presentation
Imran Arfath Jewel - 123-19-1419
Jayanta Qumar Roy - 123-19-1417
Md. Shiekh Rasel - 123-19-1410
Md. Rubel Islam - 123-19-1416
Daffodil International
University
Department of ETE

2. What is EIGRP ?
Enhanced Interior Gateway Routing Protocol (EIGRP) is a distance vector,
classless routing protocol that was released in 1992 with IOS. EIGRP is an
enhancement of Cisco IGRP(Interior Gateway Routing Protocol).

3. EIGRP Packets
1.Hello packets
2. Update packets
3. Query packets
4. Reply packets
5. Acknowledgement packets

4. Hello packets
– Used to discover & form adjacencies with neighbors

5. Update packets
– Used to propagate routing information

6. There are 3 types of updates…
• Triggered Update
• Partial Update
• Bounded Update

7. Query packets
– Used by DUAL for searching
for
Networks.
– Can use Unicast or Multicast
Reply packets
– Reply packet
– Can use Unicast only
Acknowledgement
Packets
– Used to acknowledge receipt
of update, query &
reply packets.

8. EIGRP Metric Calculation
 Bandwidth-EIGRP uses a static bandwidth to calculate the
metric. Most serial interfaces use a default bandwidth value of
1.544 Mbps.
 Delay- Delay is measure of the time it takes for a packet to
traverse a route.
 Load- Load reflects the amount of traffic utilizing the link.Load
is measured dynamically .
 Reliability- Reliability is a measure of the probability that the
link fail or how often the link has experienced errors. Reliability is
measured dynamically .

9. Network Topology

10. EIGRP Metric Calculation
EIGRP reference bandwidth = 10 Mbps
= 10* 10^6 bps

11. EIGRP
* Successor
* Feasible successor
* Feasible condition
* Reported distance
* Feasible Distance

13. EIGRP Network Topology
Configuration

14. EIGRP TOPOLOGY

20. SEND DATA

21. ACK