162306a36Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0-only 262306a36Sopenharmony_ci# 362306a36Sopenharmony_ci# 802.1d Ethernet Bridging 462306a36Sopenharmony_ci# 562306a36Sopenharmony_ci 662306a36Sopenharmony_ciconfig BRIDGE 762306a36Sopenharmony_ci tristate "802.1d Ethernet Bridging" 862306a36Sopenharmony_ci select LLC 962306a36Sopenharmony_ci select STP 1062306a36Sopenharmony_ci depends on IPV6 || IPV6=n 1162306a36Sopenharmony_ci help 1262306a36Sopenharmony_ci If you say Y here, then your Linux box will be able to act as an 1362306a36Sopenharmony_ci Ethernet bridge, which means that the different Ethernet segments it 1462306a36Sopenharmony_ci is connected to will appear as one Ethernet to the participants. 1562306a36Sopenharmony_ci Several such bridges can work together to create even larger 1662306a36Sopenharmony_ci networks of Ethernets using the IEEE 802.1 spanning tree algorithm. 1762306a36Sopenharmony_ci As this is a standard, Linux bridges will cooperate properly with 1862306a36Sopenharmony_ci other third party bridge products. 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci In order to use the Ethernet bridge, you'll need the bridge 2162306a36Sopenharmony_ci configuration tools; see <file:Documentation/networking/bridge.rst> 2262306a36Sopenharmony_ci for location. Please read the Bridge mini-HOWTO for more 2362306a36Sopenharmony_ci information. 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci If you enable iptables support along with the bridge support then you 2662306a36Sopenharmony_ci turn your bridge into a bridging IP firewall. 2762306a36Sopenharmony_ci iptables will then see the IP packets being bridged, so you need to 2862306a36Sopenharmony_ci take this into account when setting up your firewall rules. 2962306a36Sopenharmony_ci Enabling arptables support when bridging will let arptables see 3062306a36Sopenharmony_ci bridged ARP traffic in the arptables FORWARD chain. 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci To compile this code as a module, choose M here: the module 3362306a36Sopenharmony_ci will be called bridge. 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci If unsure, say N. 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ciconfig BRIDGE_IGMP_SNOOPING 3862306a36Sopenharmony_ci bool "IGMP/MLD snooping" 3962306a36Sopenharmony_ci depends on BRIDGE 4062306a36Sopenharmony_ci depends on INET 4162306a36Sopenharmony_ci default y 4262306a36Sopenharmony_ci help 4362306a36Sopenharmony_ci If you say Y here, then the Ethernet bridge will be able selectively 4462306a36Sopenharmony_ci forward multicast traffic based on IGMP/MLD traffic received from 4562306a36Sopenharmony_ci each port. 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ci Say N to exclude this support and reduce the binary size. 4862306a36Sopenharmony_ci 4962306a36Sopenharmony_ci If unsure, say Y. 5062306a36Sopenharmony_ci 5162306a36Sopenharmony_ciconfig BRIDGE_VLAN_FILTERING 5262306a36Sopenharmony_ci bool "VLAN filtering" 5362306a36Sopenharmony_ci depends on BRIDGE 5462306a36Sopenharmony_ci depends on VLAN_8021Q 5562306a36Sopenharmony_ci default n 5662306a36Sopenharmony_ci help 5762306a36Sopenharmony_ci If you say Y here, then the Ethernet bridge will be able selectively 5862306a36Sopenharmony_ci receive and forward traffic based on VLAN information in the packet 5962306a36Sopenharmony_ci any VLAN information configured on the bridge port or bridge device. 6062306a36Sopenharmony_ci 6162306a36Sopenharmony_ci Say N to exclude this support and reduce the binary size. 6262306a36Sopenharmony_ci 6362306a36Sopenharmony_ci If unsure, say Y. 6462306a36Sopenharmony_ci 6562306a36Sopenharmony_ciconfig BRIDGE_MRP 6662306a36Sopenharmony_ci bool "MRP protocol" 6762306a36Sopenharmony_ci depends on BRIDGE 6862306a36Sopenharmony_ci default n 6962306a36Sopenharmony_ci help 7062306a36Sopenharmony_ci If you say Y here, then the Ethernet bridge will be able to run MRP 7162306a36Sopenharmony_ci protocol to detect loops 7262306a36Sopenharmony_ci 7362306a36Sopenharmony_ci Say N to exclude this support and reduce the binary size. 7462306a36Sopenharmony_ci 7562306a36Sopenharmony_ci If unsure, say N. 7662306a36Sopenharmony_ci 7762306a36Sopenharmony_ciconfig BRIDGE_CFM 7862306a36Sopenharmony_ci bool "CFM protocol" 7962306a36Sopenharmony_ci depends on BRIDGE 8062306a36Sopenharmony_ci help 8162306a36Sopenharmony_ci If you say Y here, then the Ethernet bridge will be able to run CFM 8262306a36Sopenharmony_ci protocol according to 802.1Q section 12.14 8362306a36Sopenharmony_ci 8462306a36Sopenharmony_ci Say N to exclude this support and reduce the binary size. 8562306a36Sopenharmony_ci 8662306a36Sopenharmony_ci If unsure, say N. 87