View source for CentOS 8.x Configure ethernet port for 802.3 encapsulated trunk traffic communication

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'''There is old article on this at [[Configuring ethernet port in trunk mode]]'''

On a trunk port there can be multiple tagged VLAN traffic.  We can access traffic of a particular VLAN on a sub-interface.  To create a sub-interface we need to create sub-interface configuration file using:
# Enable 8021q module using:
#:<pre>
#:: modprobe 8021q
#:: lsmod | grep 802
#:</pre>
# Enable module on boot by creating '<tt>/etc/modules-load.d/01-8021q.conf</tt>' with:
#:<pre>
#:: 8021q
#:</pre>
# To access traffic of a particular VLAN on a sub-interface, create sub-interface configuration file '<tt>/etc/sysconffig/network-scripts/ifcfg-&lt;interface-name&gt;.&lt;vlan-id&gt;</tt>'.
#:Example name <tt>/etc/sysconfig/network-scripts/ifcfg-eth0.101</tt> if interface eth0 is in trunk mode with VLAN 101 traffic coming tagged.
#::<pre>
#::: VLAN=yes
#::: TYPE=Vlan
#::: PHYSDEV=eth0
#::: VLAN_ID=101
#::: REORDER_HDR=yes
#::: GVRP=no
#::: MVRP=no
#::: HWADDR=
#::: PROXY_METHOD=none
#::: BROWSER_ONLY=no
#::: BOOTPROTO=none
#::: IPADDR=10.100.1.11
#::: PREFIX=24
#::: GATEWAY=10.100.1.1
#::: DNS1=10.100.1.2
#::: DEFROUTE=yes
#::: IPV4_FAILURE_FATAL=no
#::: IPV6_DISABLED=yes
#::: IPV6INIT=no
#::: NAME=eth0.101
#::: DEVICE=eth0.101
#::: ONBOOT=yes
#::</pre>
#::and so on as per requirement.
#Restart network and see if sub-interface is up and running as expected
#:<pre>
#:: nmcli networking off; nmcli networking on
#:</pre>


Note:
* You can use
*:<pre>
*:: nmtui
*:</pre>
*:: to configure appropriate interface and learn about the configuration parameters'''

Refer:
* https://tutoexpress.com/index.php/centos-configuring-802-1q-tag-vlan/ to see how to do the same via ip command



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