VLAN filtering

configname: CONFIG_BRIDGE_VLAN_FILTERING

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>VLAN filtering
In linux kernel since version 3.1 (release Date: 2011-10-24)
If you say Y here, then the Ethernet bridge will be able selectively
receive and forward traffic based on VLAN information in the packet
any VLAN information configured on the bridge port or bridge device.

Say N to exclude this support and reduce the binary size.

If unsure, say Y.