While positive feedback loops generally don't last long enough to bring down a network completly, then long enough to disrupt traffic flows or to cause the networkto converge more slowly then it…

Question

Options

• Awhen input traffic volumes on an interfaces causes the interface queue to overflow
• Bthe rate at which the information carried in the various control plane protocols changes
• Cmodifying the flow of traffic through the network by steering traffic based on QoS attributes
• Dduring redistribution of reachablity information between multiple control planes

• A
  21% (10)
• B
  68% (32)
• C
  11% (5)

Explanation

The rate at which control plane information changes can create a positive feedback loop because rapid, continuous updates cause devices to constantly recalculate routes and states, which can overwhelm the control plane and slow network convergence. This sustained churn can be long- lived and destabilizing. Redistribution of reachability information between multiple control planes is known to open the door to very destructive positive feedback loops. When routes are redistributed between different routing protocols or control planes, inconsistent metrics or route flapping can cause repeated updates and oscillations, severely impacting control plane stability.

No community discussion yet for this question.