[GFORGX]

Tested just the same on my laptop

root@laptop> ifconfig /home/gforgx
em0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING ,VLAN_HWCSUM,TSO4,WOL_MAGIC>
ether 00:1f:29:a0:8a:5f
inet6 fe80::21f:29ff:fea0:8a5f%em0 prefixlen 64 scopeid 0x1
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=3<RXCSUM,TXCSUM>
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2
inet 127.0.0.1 netmask 0xff000000
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
pflog0: flags=100<PROMISC> metric 0 mtu 33200
em0.8: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=3<RXCSUM,TXCSUM>
ether 00:1f:29:a0:8a:5f
inet6 fe80::21f:29ff:fea0:8a5f%em0.8 prefixlen 64 scopeid 0x4
inet 10.1.2.161 netmask 0xfff00000 broadcast 10.15.255.255
nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
vlan: 8 parent interface: em0
root@laptop> tcpdump -nn /home/gforgx
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on em0.8, link-type EN10MB (Ethernet), capture size 96 bytes
03:21:46.218710 ARP, Request who-has 10.0.10.1 tell 10.1.2.161, length 28
03:21:49.597597 ARP, Request who-has 10.0.0.1 tell 10.1.2.161, length 28
^C
2 packets captured
2 packets received by filter
0 packets dropped by kernel

ARP requests above are requests generated by my laptop while pinging 2 hosts.