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