Multi-Controller Placement Optimization Using Naked Mole-Rat Algorithm over Software-Defined Networking Environment

Table 6

Average SC latency for BAT and NMR algorithms.

Number of controllers (K)	Number of controlled switches			Average SC latency (ms)	Increase in latency from previous
	Node (12), Los Angeles	Node (10), Chicago	Node (0), New York
2 (NMR/BAT) algorithm	5 switches, nodes: 11–15	14 switches, nodes: 0–10, 16–18	—	5.08	—
2 (NMR/BAT) algorithm	8 switches, nodes: 5, 8, 11–16	—	11 switches, nodes: 0-4, 6–10, 17, 18	5.61	10%