1) Nodes in the design are being divided in the format of OC48 x 2 x 2 so that in case of any link failure, the node has a back up link with the same node in the same direction for the continuous flow of the traffic.
2) The high availability of the second path in case of node failure can be guaranteed which will be second possible shortest path, with minimum cost because we are using Distance vector routing algorithm to pass the data packet from the source to the destination.
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