Datasheet
Lab – Troubleshooting Basic PPP with Authentication
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Step 1: Verify that the interfaces listed in the Addressing Table are active and configured with
the correct IP address information.
Issue the show ip interface brief command on all routers to verify that the interfaces are in an up/up state.
R1# show ip interface brief
Interface IP-Address OK? Method Status Protocol
Embedded-Service-Engine0/0 unassigned YES unset administratively down down
GigabitEthernet0/0 unassigned YES unset administratively down down
GigabitEthernet0/1 192.168.1.1 YES manual up up
Serial0/0/0 192.168.12.1 YES manual up up
Serial0/0/1 192.168.31.1 YES manual up up
R2# show ip interface brief
Interface IP-Address OK? Method Status Protocol
Embedded-Service-Engine0/0 unassigned YES unset administratively down down
GigabitEthernet0/0 unassigned YES unset administratively down down
GigabitEthernet0/1 unassigned YES unset administratively down down
Serial0/0/0 192.168.12.2 YES manual up up
Serial0/0/1 192.168.23.1 YES manual up up
Loopback0 209.165.200.225 YES manual up up
R3# show ip interface brief
Interface IP-Address OK? Method Status Protocol
Embedded-Service-Engine0/0 unassigned YES unset administratively down down
GigabitEthernet0/0 unassigned YES unset administratively down down
GigabitEthernet0/1 192.168.3.1 YES manual up up
Serial0/0/0 192.168.13.2 YES manual up up
Serial0/0/1 192.168.23.2 YES manual up up
Resolve all problems found. Record the commands used to correct the configuration.
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R1(config)# interface s0/0/1
R1(config-if)# ip address 192.168.13.1 255.255.255.252
Step 2: Verify OSPF Routing
Issue the show ip protocols command to verify that OSPF is running and that all networks are advertised.
R1# show ip protocols
*** IP Routing is NSF aware ***
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 1.1.1.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
192.168.1.0 0.0.0.255 area 0
192.168.12.0 0.0.0.3 area 0