LAB: OSPF Interface Tuning and Troubleshooting
He're you'll be playing with interface types and optimizing a bit. You'll be putting some troubleshooting skills into action as well.
- Change the interface types on your backbone to the type indicated on the diagram below
- Gather debugging info into a file called
ospf-int.log
that will allow you to troubleshoot in depth any interface type mismatches
- Stop debugging, and examine the tracefile created in the previous step and find an error for an interface type mismatch
Lab OSPF Interface Types
- Bring up new OSPF adjacencies with routers R1, R2, R6, R8, R9 and R10 as indicated in the diagram below
- Hint: Start a tracefile to help troubleshoot any adjacency formation problems
- Make sure your J2300 never becomes a DR of any sort on the links into areas 0.0.0.1, 0.0.0.2 and 0.0.0.3
- Log any LSA Retransmissions into a file called
ospf.log
- Back off the LSA Retransmission timers on your backbone links to 8 seconds
- Speed up the LSA Retransmission timers on your links into areas 0.0.0.1, 0.0.0.2 and 0.0.0.3 by 2 seconds
- To account for an extremely stable backbone, turn on LSA flood reduction on all Point-to-Point links in area 0.0.0.0
- Make sure your router is no longer tracing on OSPF
Lab OSPF Areas
Diagram Downloads:
Scalable Vector Graphics,
Graphviz dotfile
Stuck: