1# SPDX-License-Identifier: GPL-2.0-only 2# 3# 802.1d Ethernet Bridging 4# 5 6config BRIDGE 7 tristate "802.1d Ethernet Bridging" 8 select LLC 9 select STP 10 depends on IPV6 || IPV6=n 11 ---help--- 12 If you say Y here, then your Linux box will be able to act as an 13 Ethernet bridge, which means that the different Ethernet segments it 14 is connected to will appear as one Ethernet to the participants. 15 Several such bridges can work together to create even larger 16 networks of Ethernets using the IEEE 802.1 spanning tree algorithm. 17 As this is a standard, Linux bridges will cooperate properly with 18 other third party bridge products. 19 20 In order to use the Ethernet bridge, you'll need the bridge 21 configuration tools; see <file:Documentation/networking/bridge.rst> 22 for location. Please read the Bridge mini-HOWTO for more 23 information. 24 25 If you enable iptables support along with the bridge support then you 26 turn your bridge into a bridging IP firewall. 27 iptables will then see the IP packets being bridged, so you need to 28 take this into account when setting up your firewall rules. 29 Enabling arptables support when bridging will let arptables see 30 bridged ARP traffic in the arptables FORWARD chain. 31 32 To compile this code as a module, choose M here: the module 33 will be called bridge. 34 35 If unsure, say N. 36 37config BRIDGE_IGMP_SNOOPING 38 bool "IGMP/MLD snooping" 39 depends on BRIDGE 40 depends on INET 41 default y 42 ---help--- 43 If you say Y here, then the Ethernet bridge will be able selectively 44 forward multicast traffic based on IGMP/MLD traffic received from 45 each port. 46 47 Say N to exclude this support and reduce the binary size. 48 49 If unsure, say Y. 50 51config BRIDGE_VLAN_FILTERING 52 bool "VLAN filtering" 53 depends on BRIDGE 54 depends on VLAN_8021Q 55 default n 56 ---help--- 57 If you say Y here, then the Ethernet bridge will be able selectively 58 receive and forward traffic based on VLAN information in the packet 59 any VLAN information configured on the bridge port or bridge device. 60 61 Say N to exclude this support and reduce the binary size. 62 63 If unsure, say Y. 64