MAC address collision

[luckyh]

Due to the way the MAC address generation is implemented, we would get unignorable MAC collisions during multiple job instances running in the same LAN simultaneously. The theoretical value of probabilities are shown in the figure below.

N: number of job instances running in the same LAN
P: probability of MAC collisions when using the 9a prefix

N	P(9a:xx) (the current one)	P(9a:xx:xx)	P(9a:xx:xx:x)	P(9a:xx:xx:xx:x)
2	0.39%	0.00%	0.00%	0.00%
3	1.17%	0.00%	0.00%	0.00%
4	2.33%	0.01%	0.00%	0.00%
5	3.85%	0.02%	0.00%	0.00%
6	5.73%	0.02%	0.00%	0.00%
7	7.94%	0.03%	0.00%	0.00%
8	10.46%	0.04%	0.00%	0.00%
9	13.26%	0.05%	0.00%	0.00%
10	16.31%	0.07%	0.00%	0.00%
11	19.57%	0.08%	0.01%	0.00%
12	23.03%	0.10%	0.01%	0.00%
13	26.64%	0.12%	0.01%	0.00%
14	30.36%	0.14%	0.01%	0.00%
15	34.17%	0.16%	0.01%	0.00%
16	38.03%	0.18%	0.01%	0.00%
17	41.90%	0.21%	0.01%	0.00%
18	45.76%	0.23%	0.01%	0.00%
19	49.57%	0.26%	0.02%	0.00%
20	53.32%	0.29%	0.02%	0.00%
30	82.94%	0.66%	0.04%	0.00%
40	95.99%	1.18%	0.07%	0.00%
50	99.41%	1.85%	0.12%	0.00%
60	99.95%	2.67%	0.17%	0.00%
70	99.99%	3.62%	0.23%	0.00%

Suggest expanding the random field size.