続きです。
/var/log/messages
Nov 12 08:19:01 yejin kernel: rgephy0: <RTL8169S/8110S media interface> on miibus0
Nov 12 08:19:01 yejin kernel: rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX, 1000baseTX-FDX, auto
Nov 12 08:19:01 yejin kernel: re0: Ethernet address: 00:01:80:3f:ac:38
N
起動直後
# ifconfig
re0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
options=18<VLAN_MTU,VLAN_HWTAGGING>
ether 00:01:80:3f:ac:38
media: Ethernet autoselect (10baseT/UTP)
status: active
plip0: flags=108810<POINTOPOINT,SIMPLEX,MULTICAST,NEEDSGIANT> mtu 1500
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3

root で手動で実行
# dhclient re0
DHCPREQUEST on re0 to 255.255.255.255 port 67
DHCPREQUEST on re0 to 255.255.255.255 port 67
DHCPACK from 192.168.1.1
bound to 192.168.1.14 -- renewal in 129600 seconds.