QuestionQ26
Network DesignIn a redundant hub-and-spoke “wheel” topology, every spoke is connected to the hub, and spokes also connect to other spokes. If one spoke link fails, traffic from that site can be sent to a neighboring site, which forwards it to the hub site. However, at peak hours, an overloaded link causes traffic to be rerouted to a neighbor that then becomes overloaded. This overload produces network-traffic oscillation as the load changes at each spoke site. The design supplies more redundancy but not more resiliency because the routing protocol must evaluate many alternate paths to identify the lowest-cost path.
Which two design changes help improve resiliency in this situation?
Choose two
- A Increase the number of redundant paths considered during the routing convergence calculation.
- B Eliminate links between every spoke.
- C Increase routing protocol convergence timers.
- D Increase unequal-cost parallel paths.
- E Use two links to each remote site instead of one.
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