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Я могу понять:

1. 3 floors(A, B, C), there is a WIFI AP with same APN but different BSSID in each floor.
2. Will get different IP different subnet if I connect to different WIFI AP
3. the router's MAC address remains same.

Другие выходы:

Этаж А

IP: 10.204.100.12
subnet: 255.255.252.0
router: 10.204.103.254(MAC: for example 11:22:33:44:55:66)

$ traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 52 byte packets
 1  10.204.1.178 (10.204.1.178)  1.575 ms  1.500 ms  1.517 ms
 2  10.204.103.254 (10.204.103.254)  63.216 ms  81.889 ms  9.167 ms

Этаж Б

IP: 10.204.109.44
subnet: 255.255.252.0
router: 10.204.111.254(same 11:22:33:44:55:66)

$ traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 52 byte packets
 1  10.204.1.178 (10.204.1.178)  1.476 ms  1.510 ms  1.465 ms
 2  10.204.111.254 (10.204.111.254)  23.543 ms 31.441 ms  19.712 ms

Этаж С

IP: 10.204.118.132
subnet: 255.255.252.0
router: 10.204.119.254(same 11:22:33:44:55:66)

$ traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 52 byte packets
 1  10.204.1.178 (10.204.1.178)  1.743 ms  1.314 ms  1.688 ms
 2  10.204.119.254 (10.204.119.254)  43.321 ms 71.116 ms  59.281 ms

Так что я думаю, может быть, так?

Что я не понимаю, так это

1. why router with same MAC address can have different IP?
2. what is 10.204.1.178? this is in different subnet, why I can access it?
3. where might 10.204.1.178 be?
4. any other strange thing?

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