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The Basic Issue In Large Operational Networks Running Link-State Protocols we have Often Observed Sustained CPU Congestion (Often Memory Congestion as well) Caused by LSA Storms Triggered By Links/Nodes Failures Synchronization of Refreshes Software Bugs or Procedural Errors Congestion Reinforced by Positive Feedback Loop due to LSA Retransmissions, possible packet droppings, possible link failures due to missed Hellos and eventual recoveries More LSAs On Rare Occasions the Congestion Spreads to Many Nodes and Cause Significant Failures We Propose Prioritization of Hello, LSA Acknowledgment Packets to improve Network Stability and Scalability Prioritized Treatment may be facilitated by Special Marking “Smart” Proprietary Implementations are perhaps already doing it but we propose them as Best Current Practices so that all implementations benefit from it |