CST3607 Class Notes 2018-11-01

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Lab-03 Debriefing

  • Compare Routing Table Worksheet with the output of “show ip route” from each router.

Decoding the output from “show ip route”

This is one entry from: show ip route

O [110/74] via, 05:29:08, Serial0/0

ORouting protocol “OSPF” network
[110Administrative Distance (AD)
/74]OSPF cost
via hop for the /8 network
05:29:08Aging time. How long the protocol has been running?
Serial0/0Exit interface


Router Configuration Checklist

  • Identify the interfaces on the router that are going to be used.
  • Identify the directly connected networks.
  • 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 the routing protocol
    • Add only the network address for each “directly connected” network

Cisco IOS

  • Adding an IP address to an interface
  • Adding the RIP routing protocol
  • Troubleshooting/Status commands
  • Routing protocols
  • How to configure:
    • Serial Ports
      • DCE vs DTEClock Rate on DCE end onlyshow controller serial0/0OSPF Routing Protocol
      • Uses the Wildcard mask, instead of the subnet maskDHCP via Cisco IOS
      • Set the rangeexclude addresses for static IP’s from the DHCP pool
  • Cisco IOS Reference

Router Simulator (RouterSim)

Lab-04: (Configuring Router interfaces, and the RIP Routing Protocol)

  • You’ll need a USB Flash drive with at least 200MB of free space to save your labs.
  • When saving, always increment the version number at the end of the filename every time you save. And, save often.
  • Instructions (PDF)
  • Network Diagram (PDF)
  • The lab must be done in RouterSim
    • RouterSim is available in any of the CST computers in the Namm building. (4th & 9th floors)
  • Note: Substitute the # within an IP address with the number assigned to you in class. Use all other octets/digits, as written.
  • After you’ve verified that all of your configurations are complete and accurate, and you’re able to ping from host A to B and from B to A, and the routing tables on both routers are correct, only then e-mail your completed RSM file and configuration text file to me for grading.
    • E-mail Subject: CST3607 Lab-04 YourLastName
  • Note: Do not use “version 2” when configuring RIP
  • Important: Lab-04 is required, as it is the starting point/baseline for future labs.

Troubleshooting Your Lab?

  • Did you enable all the required interfaces on all the routers? no shutdown
  • Have you checked all the router interfaces to make sure that both Status and Protocol are both up? show ip interface brief
  • Did you check that the clockrate on the DCE interface is set and greater than zero?
  • Did you add only the directly connected networks to the routing protocol?
  • Did you use the interface’s IP address instead of it’s network address when configuring the routing protocol?
  • Did you use the wildcard mask, not the subnet mask, when configuring OSPF?
  • When you ping a host or router, where is the ICMP request failing to get to its destination?
  • Still having problems? And you’re confident that your configuration is correct? Save the lab, exit RouterSim, and then reload the lab.

Study for Exam #2

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