Chapter 3: Dynamic routing

Chapter 3: Dynamic routing

1. Evolution of the dynamic routing

   • since the end of the eighties.

2. Dynamic routing protocol components

   • Data structures
   • Routing protocol messages
   • Algorithm

3. Uses of static routing

   • It facilitates the maintenance
   • Routing from and towards a network of internal routes
   • Access to a single default route

4. Advantages and disadvantages of static routing

   • Advantages
     • Easy to implement
     • Very sure
     • Does not need additional resources
   • Disadvantages
     • Simple topologies
     • Complex
     • Manual intervention

5. Uses of dynamic routing protocols

   • Administration
   • Configuration
   • Maintenance

6. Advantages and disadvantages of dynamic routing

   • Advantages
     • Suitable
     • Independent
     • Automatic adaptation
   • Disadvantages
     • Complex implementation
     • Less safe
     • Depends of the topology
     • Needs additional resources

7. RIP configuration mode on the router

   • Router rip
   • No router rip

8. Network announcement

   • Network + network address
   • Enable the RIP on all interfaces
   • Publish the network

9. Verify RIP routing

   • show ip protocols
   • show ip route

10. Enabling and verifying RIPv2

    • Router configuration mode version 2
    • no version reverts the router to the default configuration.

11. Disable automatic summary

    • no auto-summary

12. Configuration of passive interfaces

    • Bandwidth wastage
      • Unnecessary updates
    • Waste of resources
      • Process the update
    • Security risk
      • Interception
    • passive-interface
    • passive-interface default.
    • no passive-interface.

13. Propagate a default route

    • ip route 0.0.0.0 0.0.0.0.
    • default-information originate

14. Entries in the routing table

    • Structure based on class scheme

15. Directly connected inputs

    • Origin of the route
    • Destination network
    • Exit interface

16. Remote network entries

    • Origin of the route
    • Target network
    • Administrative distance (AD)
    • Metrics
    • Next jump
    • Time stamp of the route
    • Output interface

17. Terms of the routing table

    • Final route
    • Level 1 route
      • network path
      • superred route
      • default route
    • Secondary routes of level 2
    • Main route of level 1

18. Route search process

    • Analyze
    • Identify
    • Continue

19. Best route = longest match

    • > amount of bit on the left = best preferred route

20. IPv6 routing table entries

    • Similar to IPv4

21. Directly connected inputs

    • Origin of the route
    • Directly connected network
    • Administrative Distance
    • Metrics
    • Output Interface

22. Inputs of remote IPv6 networks

    • Origin of the route
    • Target network
    • Administrative distance
    • Metrics
    • Next jump
    • Output interface