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Kconfig
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# SPDX-License-Identifier: GPL-2.0-only
#
# 802.1d Ethernet Bridging
#
config BRIDGE
tristate "802.1d Ethernet Bridging"
select LLC
select STP
depends on IPV6 || IPV6=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 M here: the module
will be called bridge.
If unsure, say N.
config BRIDGE_IGMP_SNOOPING
bool "IGMP/MLD snooping"
depends on BRIDGE
depends on INET
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 BRIDGE_VLAN_FILTERING
bool "VLAN filtering"
depends on BRIDGE
depends on VLAN_8021Q
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.
config BRIDGE_MRP
bool "MRP protocol"
depends on BRIDGE
default n
help
If you say Y here, then the Ethernet bridge will be able to run MRP
protocol to detect loops
Say N to exclude this support and reduce the binary size.
If unsure, say N.
config BRIDGE_CFM
bool "CFM protocol"
depends on BRIDGE
help
If you say Y here, then the Ethernet bridge will be able to run CFM
protocol according to 802.1Q section 12.14
Say N to exclude this support and reduce the binary size.
If unsure, say N.