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

Table 14

Global average latency variation with different cases for SC and CC using NMR and BAT algorithms.

Cases	Average SC latency	Global average latency	Remarks
I. Only SC	Decreasing with increasing controller number	—	—
II. 0.9 SC + 0.1 CC	—	Not decreasing with increasing controller number	Slight decline at k = 2 and 3 and slight increment after after k = 4
III. 0.8 SC + 0.2 CC	—	Starts rising with increasing controller number	Effect of increase in CC latency