Table of Contents
OSPF ABR Behavior
Introduction
Acknowledgements
Topics
Standard Inter-Area Routing
Problems in Standard Routing
ABR without a backbone link
ABR without a backbone link
ABR without a backbone link
ABR without a backbone link
Suboptimal routing
Suboptimal routing
Suboptimal routing
Alternative Non-Backbone Paths
Alternative Non-Backbone Paths
“Transit Router” Behavior
“Transit Router” Behavior
“Transit Router” Behavior
“Transit Router” Behavior
“Transit Router” Behavior
“Short-cut ABR” Behavior
“Short-cut ABR” Behavior
Short-cut ABR Brief Details
Short-cut ABR Routing Table Calculation
Short-cut ABR Backbone Summaries
Short-cut ABR Backbone Summaries (cont.)
Short-cut ABR Examining Transit Areas’ Summaries
Short-cut ABR Summary-LSA Origination
Short-cut ABR Case Studies
Short-cut ABR Case Studies
Short-cut ABR Case Studies
Short-cut ABR Case Studies
Short-cut ABR Potential Problems
Short-cut ABR Overlapping Summaries
Short-cut ABR Default Summaries in Stub Areas
To Do: Changing Route Preference Rules
To Do: Summaries for Backbone Networks
The End
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