Ilab7 Netw-204

NETW-204

iLab week 7

BSCI: Configuring OSPF Single Area

In this lab, we are trying to replace a working network running IGRP, with OSPF single area only. To do this we must Remove IGRP from three of the rotuers, configure OSPF on the same three routers, verify OSPF is working properly, and test and verify connectivity. To Remove IGRP and configure OSPF on the routers we first shutdown the interface we are going to configure. This is so that we set up OSPF systematically, and not all at once. So to Remove IGRP we use the command

"no router igrp <autonomous-system>"

To configure OSPF we use the command

"router ospf <process-id>"

but OSPF is not enabled until we add a network using this command

"network <ip-address> <mask> area <area-id>"

After we have tested that OSPF is up and running properly, we have to set a router to be the DR, and another router to be the BDR. WE can do this by shutting down the interfaces and using the command

"ip ospf priority <number>"

To verify we use the commands

"show ip ospf neighbor"

"show ip ospf interface <interface>"

To Display the OSPF adjacency events we can use the command

"debug ip ospf adjacency"

As with all debug commands, turning them off is very important to save valuable CPU resources. We can also use the command

"show ip ospf database"

to see link-state database information.