arp -a for M

? (192.168.1.1) at c8:b3:73:a:c8:97 on en0 ifscope [ethernet]
? (192.168.1.255) at ff:ff:ff:ff:ff:ff on en0 ifscope [ethernet]
? (192.168.2.2) at 0:26:32:f0:9:6b on en5 ifscope [ethernet]
? (192.168.2.2) at 0:26:32:f0:9:6b on bridge100 ifscope [bridge]
? (192.168.2.255) at ff:ff:ff:ff:ff:ff on bridge100 ifscope [bridge]
? (192.168.255.255) at ff:ff:ff:ff:ff:ff on en5 ifscope [ethernet]
? (239.255.255.250) at 1:0:5e:7f:ff:fa on bridge100 ifscope permanent [ethernet]