# SPDX-License-Identifier: GPL-2.0-only
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#
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# 802.1d Ethernet Bridging
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#
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config BRIDGE
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tristate "802.1d Ethernet Bridging"
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select LLC
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select STP
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depends on IPV6 || IPV6=n
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help
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If you say Y here, then your Linux box will be able to act as an
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Ethernet bridge, which means that the different Ethernet segments it
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is connected to will appear as one Ethernet to the participants.
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Several such bridges can work together to create even larger
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networks of Ethernets using the IEEE 802.1 spanning tree algorithm.
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As this is a standard, Linux bridges will cooperate properly with
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other third party bridge products.
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In order to use the Ethernet bridge, you'll need the bridge
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configuration tools; see <file:Documentation/networking/bridge.rst>
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for location. Please read the Bridge mini-HOWTO for more
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information.
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If you enable iptables support along with the bridge support then you
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turn your bridge into a bridging IP firewall.
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iptables will then see the IP packets being bridged, so you need to
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take this into account when setting up your firewall rules.
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Enabling arptables support when bridging will let arptables see
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bridged ARP traffic in the arptables FORWARD chain.
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To compile this code as a module, choose M here: the module
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will be called bridge.
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If unsure, say N.
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config BRIDGE_IGMP_SNOOPING
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bool "IGMP/MLD snooping"
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depends on BRIDGE
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depends on INET
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default y
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help
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If you say Y here, then the Ethernet bridge will be able selectively
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forward multicast traffic based on IGMP/MLD traffic received from
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each port.
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Say N to exclude this support and reduce the binary size.
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If unsure, say Y.
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config BRIDGE_VLAN_FILTERING
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bool "VLAN filtering"
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depends on BRIDGE
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depends on VLAN_8021Q
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default n
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help
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If you say Y here, then the Ethernet bridge will be able selectively
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receive and forward traffic based on VLAN information in the packet
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any VLAN information configured on the bridge port or bridge device.
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Say N to exclude this support and reduce the binary size.
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If unsure, say Y.
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config BRIDGE_MRP
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bool "MRP protocol"
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depends on BRIDGE
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default n
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help
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If you say Y here, then the Ethernet bridge will be able to run MRP
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protocol to detect loops
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Say N to exclude this support and reduce the binary size.
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If unsure, say N.
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