I browsed here but found no discussion on this. Perhaps the switch in front of the eth MAC has enough smarts to keep the two subnets separate? Still it sort of worries me, if I used the AEBS as my only router, that both WAN and LAN go thru the same ethernet MAC (same h/w).

I tried to provoke some leakage between the two sides (for example with broadcast packets), but haven't been able to do it so yet. The model will be listed as either UC-ENGINE-S-T or UC-ENGINE-P-T. IP address HW type Flags HW address Mask Deviceġ0.0.1.1 0x1 0x2 00:16:CB:C4:30:A6 * eth0ġ0.0.1.1 on the LAN side of AEBS and 192.168.1.21 on the WAN side of the AEBS both use the same MAC address, 00:16:CB:C4:30:A6. To identify the ASUS Compute (ASUS), there is a label attached to the top of the compute where you can check the Serial Number which will begin with 4 numbers, 3 letters, followed by 5 numbers for example of: 1234NAA56789. View of AEBS LAN side (from a Linux box at # cat /proc/net/arp I confirmed my suspicion that both the WAN port and the LAN ports share the same MAC address! My setup has the AEBS WAN port plugged into my home LAN's main router, and a Linux machine plugged into a LAN port of the AEBS. When I bought the AEBS(n), I was a bit surprised to see only one ethernet MAC address listed (on bottom of unit, or was it in config utility?), in addition to wireless MAC.

Asus mac address lookup