Instead of a generic ethX identifier that
Linux® uses to identify a network interface, FreeBSD uses the driver
name followed by a number as the identifier. The following output
from ifconfig(8) shows two Intel® Pro 1000 network
interfaces (em0
and em1
):
%
ifconfig
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 options=b<RXCSUM,TXCSUM,VLAN_MTU> inet 10.10.10.100 netmask 0xffffff00 broadcast 10.10.10.255 ether 00:50:56:a7:70:b2 media: Ethernet autoselect (1000baseTX <full-duplex>) status: active em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 options=b<RXCSUM,TXCSUM,VLAN_MTU> inet 192.168.10.222 netmask 0xffffff00 broadcast 192.168.10.255 ether 00:50:56:a7:03:2b media: Ethernet autoselect (1000baseTX <full-duplex>) status: active
An IP address can be assigned to an interface using
ifconfig(8). However, to remain persistent across reboots the
IP configuration must be included in
/etc/rc.conf
. The following example
specifies the hostname, IP address, and default gateway:
hostname="server1.example.com" ifconfig_em0="inet 10.10.10.100 netmask 255.255.255.0" defaultrouter="10.10.10.1"
Use the following to configure an interface for DHCP:
hostname="server1.example.com" ifconfig_em0="DHCP"
All FreeBSD documents are available for download at http://ftp.FreeBSD.org/pub/FreeBSD/doc/
Questions that are not answered by the
documentation may be
sent to <freebsd-questions@FreeBSD.org>.
Send questions about this document to <freebsd-doc@FreeBSD.org>.