An architect designs a multi-controller network architecture with these requirements:
-Achieve fast failover to control traffic when controllers fail.
-Yield a short distance and high resiliency in the connection between the switches and the controller.
-Reduce connectivity loss and enable smart recovery to improve the SDN survivability.
-Improve connectivity by adding path diversity and capacity awareness for controllers.
Which control plane component of the multi-controller must be built to meet the requirements?
- control node reliability
- control path reliability
- controller state consistency
- controller clustering
Answer(s): B
Explanation:
Control path reliability is the ability of the control plane to maintain connectivity between the controllers and the switches. This is important for ensuring that traffic can be controlled even if one or more controllers fail.
The other options are not as relevant to the requirements.
-Control node reliability is the ability of the controllers themselves to remain up and running. This is important, but it is not as important as ensuring that the control path is reliable.
-Controller state consistency is the ability of the controllers to maintain a consistent view of the network state. This is important for ensuring that the controllers can make correct decisions about how to control traffic.
-Controller clustering is a technique for grouping controllers together so that they can share the load of controlling the network. This can improve performance, but it does not directly address the requirements of the problem.
-Therefore, the control path reliability must be built to meet the requirements of the multi-controller network architecture.
Here are some additional details about control path reliability:
-Control path reliability can be achieved through a variety of techniques, such as using multiple controllers, using redundant links between the controllers and the switches, and using load balancing algorithms to distribute traffic across the controllers.
-Control path reliability is important for ensuring that the network can continue to operate even if one or more controllers fail.
-Control path reliability can be improved by using techniques such as link redundancy, load balancing, and controller clustering.
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