SOLUTION VERIFIED
environment
- Red Hat Enterprise Linux 4
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
question
- Suppose I want a VLAN ID of 192 for the eth0 on a RHEL 5 or 6 system. What should my ifcfg-eth0 and my ifcfg-eth0.192 look like?
- How do you configure VLAN tagging on a RHEL system?
- Is it possible to configure multiple VLAN IDs on a single interface?
solution
RHEL 7 with NetworkManager
With
nmcli
, create a new connection of the VLAN type wherecon-name
is the name of the connection,ifname
is the name of the VLAN interface to be created,master
is the name of the interface the VLAN will be on top of, andid
is the VLAN ID (number).-
Using DHCP for IP addressing with a VLAN ID of 10:
# nmcli connection add type vlan ifname eth0.10 con-name myvlan id 10 dev eth0
- Or, with a static IP using example IP address 192.168.1.10/24 and gateway of 192.168.1.1:
# nmcli connection add type vlan ifname eth0.10 con-name myvlan id 10 dev eth0 ip4 192.168.1.10/24 gw4 192.168.1.1
RHEL 4, RHEL 5, RHEL 6, and RHEL 7 without NetworkManager
- Create an interface configuration file in the /etc/sysconfig/network-scripts/ directory with the name ifcfg-{device}.{vlan} where {device} is the interface the VLAN will be on top of and {vlan} is the VLAN ID (number). {device} can be either a regular interface or a bond. In the example below, the file would be called
ifcfg-eth0.10
. - The ifcfg file must include the DEVICE parameter which specifies the VLAN interface name and VLAN=yes must be set:
DEVICE=eth0.10
VLAN=yes
BOOTPROTO=dhcp
ONBOOT=yes
RHEL 6 with a custom VLAN interface name
- Create an interface configuration file in the /etc/sysconfig/network-scripts/ directory with the name ifcfg-{name} where {name} is the custom name for the VLAN interface.
- The ifcfg file must include: the DEVICE parameter which specifies the custom interface name, the PHYSDEV parameter which specifies the interface the VLAN will be on top of, VID which specifies the VLAN ID (number), and VLAN=yes must be set. PHYSDEV can be a bond.
- In the following example, a VLAN interface named "outside-network" will be created over eth0 with a VLAN ID of 10:
DEVICE=outside-network
VLAN=yes
PHYSDEV=eth0
VID=10
BOOTPROTO=dhcp
ONBOOT=yes
# This became possible in RHEL 6 with the release of initscripts-9.03.46-1.el6: RHBA-2014:1448-1