OSPF Neighbor Down: Area Mismatch

What you'll practise

• Bring up a point-to-point OSPF adjacency between two routers
• Read show ip ospf neighbor and show ip ospf interface
• Recognize an OSPF area mismatch from a console log message
• Correct a mismatched area on an OSPF network statement
• Verify adjacency and OSPF-learned loopback reachability

Set it up

1. 1

   Have the node image ready

   Images are not included. The file expects your own licensed copy of:

   • L3-ADVENTERPRISEK9-M-15.4-2T.bin

   If your copy has a different name, open each node's Edit dialog after importing and pick your image from the list.

2. 2

   Copy it to the server and fix permissions

   Replace <your-server> with the IP address or hostname of your EVE-NG or PNETLab server.

   $ scp ospf-neighbor-area-mismatch-lab.unl root@<your-server>:/opt/unetlab/labs/
   # then, logged in to the server:
   $ /opt/unetlab/wrappers/unl_wrapper -a fixpermissions

3. 3

   Open it and start the nodes

   The canvas notes list the objectives, and the workbook walks through the fix.