CST3607 Class Notes 2022-03-24

News & Tools

How Routers Talk to Each Other

Routing Tables

  • The minimum fields needed in a routing table:
MaskThe network prefix (in CIDR notation) of the destination network
Network addressThe network address of the destination/target network

The network interface used to get to the next hop router. 
a.k.a. “Exit Interface” 
Think… From the router you’re on, which interface do I have to send the packet out of, to get it to the neighboring router?
Next Hop IP addressThe IP address of the neighbor router closest to the router you are working on.
Think… From the router I am on, what is the IP address of the closest router to me, I must forward the packet to, to get that packet to the destination network?

Router Configuration Checklist

  • Identify the interfaces on the router to be used.
  • Identify the directly connected networks.
  • Determine the network address of each directly connected network.
  • Configure the IP address and subnet mask on only those interfaces on the router that are going to be used.
    • Enable the interface(s) : no shutdown
    • Add a description to the interface
  • Add the routing protocol
    • Add only “directly connected” networks to the routing protocol of the router.

Lab-01: Building Routing Tables

  • Download Lab-01 Assets zip from the Downloads page 
    • Overview Diagram (png)
    • Network Diagram (pdf)
    • Worksheet (docx)
  • You must be in class to get credit for this lab.

Cisco IOS and Router Command Reference

Read / Watch / Do

CCNA Certification Study Guide, Volume 2

  • Read Chapter 7 : (Layer 2 Switching)
  • Do the Written Labs
  • Answer the Review Questions
    • Do not submit your answers for this chapter. The answers are in Appendix.