PowerPoint about EIGRP Routing Protocols

1. EIGRP Routing Protocols
Name: Sultan Abdullah Supervisor: Mohammed Elmaqhawri
ID: 202622018 Networking: 7-1

2. The Rules of the lesson !!!
• Please do not use your phone
when I teach.
• Please do not talking together
when I teach.
• Please raise your hand if you
have any question.

3. Learning Objectives
• What is the router and Function of router.
• type of routing.
• What is the static routing.
• What is the dynamic routing.
• What is the EIGRP.
• EIGRP Metric Calculation.
• Basic EIGRP Configuration.

4. Router
• Functions of a Router
–Find the best Path Selections
–Forwarding packets to destination
• Router is a networking device that
forwards data packets between computer
networks.

5. Type of routing.
• A router can learn about remote networks in
one of two ways:
–Manually, from configured static routes
–Automatically, from a dynamic routing protocol
• Purpose of a static route
–A manually configured route used when routing
from a network to a stub network

6. static routing
• Advantages of static routing
-Easy to configure
-No extra resources are needed
-More secure
• Disadvantages of static routing
-Network changes require manual
reconfiguration
-Does not scale well in large topologies

7. Dynamic Routing Protocols
• Function(s) of Dynamic Routing
Protocols:
-Dynamically share information between
routers.
-Automatically update routing table
when topology changes.
-Determine best path to a destination.

8. Classifying Routing Protocols
• Dynamic routing protocols are grouped
according to characteristics. Examples include:
-RIP
-IGRP
-EIGRP
-OSPF
-IS-IS
-BGP

9. Routing Protocols Metrics
• Metric
–A value used by a routing protocol to
determine which routes are better than others.
• Metrics used in IP routing protocols
-Bandwidth
-Cost
-Delay
-Hop count
-Load
-Reliability

10. Routing Protocols Metrics
• The Metric Field in the
Routing Table
• Metric used for each
routing protocol
-RIP -
-IGRP & EIGRP -
Bandwidth (used by
default), Delay (used by
default), Load, Reliability
-IS-IS & OSPF
hop count
– Cost,
Bandwidth

11. Administrative Distance of a Route
• Purpose of Administrative Distance
–It’s a numeric value that specifies the preference of a
particular route

12. EIGRP
Reliable Transport Protocol (RTP)
Purpose of RTP
–Used by EIGRP to transmit and receive EIGRP packets
Characteristics of RTP
–Involves both reliable & unreliable delivery of EIGRP packet
 Reliable delivery requires acknowledgment from destination
 Unreliable delivery does not require an acknowledgement from destination
–Packets can be sent
 Unicast
 Multicast
–Using address 224.0.0.10

13. EIGRP
EIGRP’s 5 Packet Types
• Hello packets
–Used to discover & form adjacencies
with neighbors

14. EIGRP
• Update packets
–Used to propagate routing
information
• Acknowledgement packets
–Used to acknowledge receipt of
update, query & reply packets

15. EIGRP
• Query & Reply packets
Used by DUAL (diffusing update algorithm)
for searching of networks
Query packets
• -Can use
Unicast
Multicast
Reply packet
• -Use only
unicast

16. EIGRP
• Purpose of Hello Protocol
–To discover & establish adjacencies with
neighbor routers
• Characteristics of hello protocol
–Time interval for sending hello packet
 Most networks it is every 5 seconds
 Multipoint non broadcast multi-access networks
–Unicast every 60 seconds
-Holdtime
 This is the maximum time router should wait
before declaring a neighbor down
 Default holdtime
– 3 times hello interval

17. EIGRP
Diffusing Update Algorithm (DUAL)
–Purpose
• EIGRP’s primary method for preventing routing loops.
–Advantage of using DUAL
• Provides fast convergence time by keeping a list of loop-
free backup routes.

18. EIGRP
Administrative Distance (AD)
–Defined as the trustworthiness
of the source route
EIGRP default administrative
distances
–Summary routes = 5
–Internal routes = 90
–External routes = 170

19. EIGRP
Authentication
• EIGRP can
– Encrypt routing information
– Authenticate routing information

20. EIGRP Metric Calculation
EIGRP Composite Metric & the K Values
 EIGRP uses the following values in its composite
metric
-Bandwidth, delay, reliability, and load
 The composite metric used by EIGRP
–formula used has values K1 K5
–K1 & K3 = 1
–all other K values = 0

21. EIGRP Metric Calculation
 EIGRP Metrics
Delay is the defined as the
measure of time it takes for a
packet to traverse a route
-it is a static value based on link type to which
interface is connected

22. More EIGRP Calculation
Configuring a summary route in EIGRP

23. Basic EIGRP Configuration
• EIGRP autonomous
system number
actually functions as a
process ID
• Example
Router(config)#router eigrp
autonomous-system

24. Basic EIGRP Configuration
• Verifying EIGRP
• show ip eigrp neighbors
• show ip protocols
• show ip route
• show interface

25. Any
questions?
Thank you for
watching and listening