# SPDX-License-Identifier: GPL-2.0-only # # 802.1d Ethernet Bridging # config [31mCONFIG_BRIDGE[0m tristate "802.1d Ethernet Bridging" select [31mCONFIG_LLC[0m select [31mCONFIG_STP[0m depends on [31mCONFIG_IPV6[0m || [31mCONFIG_IPV6[0m=n ---help--- If you say Y here, then your Linux box will be able to act as an Ethernet bridge, which means that the different Ethernet segments it is connected to will appear as one Ethernet to the participants. Several such bridges can work together to create even larger networks of Ethernets using the IEEE 802.1 spanning tree algorithm. As this is a standard, Linux bridges will cooperate properly with other third party bridge products. In order to use the Ethernet bridge, you'll need the bridge configuration tools; see <file:Documentation/networking/bridge.rst> for location. Please read the Bridge mini-HOWTO for more information. If you enable iptables support along with the bridge support then you turn your bridge into a bridging IP firewall. iptables will then see the IP packets being bridged, so you need to take this into account when setting up your firewall rules. Enabling arptables support when bridging will let arptables see bridged ARP traffic in the arptables FORWARD chain. To compile this code as a module, choose [31mCONFIG_M[0m here: the module will be called bridge. If unsure, say N. config [31mCONFIG_BRIDGE_IGMP_SNOOPING[0m bool "IGMP/MLD snooping" depends on [31mCONFIG_BRIDGE[0m depends on [31mCONFIG_INET[0m default y ---help--- If you say Y here, then the Ethernet bridge will be able selectively forward multicast traffic based on IGMP/MLD traffic received from each port. Say N to exclude this support and reduce the binary size. If unsure, say Y. config [31mCONFIG_BRIDGE_VLAN_FILTERING[0m bool "VLAN filtering" depends on [31mCONFIG_BRIDGE[0m depends on [31mCONFIG_VLAN_8021Q[0m default n ---help--- 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. |