Configure network interfaces on OpenBSD

Intro

Configuration

• OS : OpenBSD 5.7

Installing

We need to create a /etc/hostname."interface_name" file for each interface, contening this information :

address_family address netmask broadcast [other options]

Settings

• dhcp : put the interface in dhcp mode
• address_family : inet for IPv4
• address : ip address
• netmask : network mask
• NONE : No broadcast address

Examples

• Set gateway :

# echo "192.168.1.1" > /etc/mygate

• Set em0 interface in dhcp :

# echo "dhcp" > /etc/hostname.em0

• Set em1 interface in static :

inet 192.168.1.2 255.255.255.0 NONE

• Set a vlan10 interface on em1 interface :

inet 172.21.0.31 255.255.255.0 NONE vlan 10 vlandev em1

• To take this changes into consideration we need to execute :

# sh /etc/netstart