ifcfg-vlan − virtual LAN interface configuration
To setup a vlan
interface you need a configuration file that contains at
least the mandatory
variable with the real interface used for the virtual LAN.
It may contain
variable that may be set to one of the supported protocols: "ieee802-1Q", "ieee802-1ad".
Further, it may
contain the optional
variable that specifies the VLAN ID.
By default and when the VLAN_ID variable is not set, the number at the end of the interface name is the VLAN ID.
Preferably the interface name and the configuration file follow the VLAN interface name schemes (types), that is either:
ifcfg-name.<VLAN-ID> (e.g. ifcfg-eth0.42)
ifcfg-vlan<VLAN-ID> (e.g. ifcfg-vlan42)
The ifcfg-name.<VLAN-ID> scheme is default on Linux. Note also, that the ifcfg-vlan<VLAN-ID> scheme makes it impossible to use same VLAN-ID on more than one interface (e.g. ifcfg-eth0.42 and ifcfg-eth1.42).
The VLAN-ID can be also 0-padded (e.g. ifcfg-vlan0042 or ifcfg-eth0.0042).
Also in case of custom names, trailing digits are interpreted as VLAN-ID by default (e.g. ifcfg-dmz42). When VLAN_ID is set in the config, the interface name can have any name (e.g. ifcfg-foobar).
Note: The drawback of custom interface names and VLAN_ID usage is, that a rename of the interface is required and that they violate the vlan name scheme.
An ifcfg- file for the interface specified by ETHERDEVICE must also be provided. In the most basic case, it should at least contain STARTMODE=’auto’.
The rest of the VLAN interface IP and routes configuration do not differ from ordinary interfaces. See also man ifcfg and man routes for details.
Sets up eth0.3 vlan interface on top of eth0:
Sets up vlan3 vlan interface on top of eth0:
Sets up lan1 vlan interface with ID 42 on top of eth0:
Please report bugs at <http://www.suse.de/feedback>
Marius Tomaschewski <firstname.lastname@example.org>
routes(5), ifcfg(5), wicked(8).
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