16a2e9b73SSam Ravnborg# 26a2e9b73SSam Ravnborg# 802.1d Ethernet Bridging 36a2e9b73SSam Ravnborg# 46a2e9b73SSam Ravnborg 56a2e9b73SSam Ravnborgconfig BRIDGE 66a2e9b73SSam Ravnborg tristate "802.1d Ethernet Bridging" 7*cf0f02d0SStephen Hemminger select LLC 86a2e9b73SSam Ravnborg ---help--- 96a2e9b73SSam Ravnborg If you say Y here, then your Linux box will be able to act as an 106a2e9b73SSam Ravnborg Ethernet bridge, which means that the different Ethernet segments it 116a2e9b73SSam Ravnborg is connected to will appear as one Ethernet to the participants. 126a2e9b73SSam Ravnborg Several such bridges can work together to create even larger 136a2e9b73SSam Ravnborg networks of Ethernets using the IEEE 802.1 spanning tree algorithm. 146a2e9b73SSam Ravnborg As this is a standard, Linux bridges will cooperate properly with 156a2e9b73SSam Ravnborg other third party bridge products. 166a2e9b73SSam Ravnborg 176a2e9b73SSam Ravnborg In order to use the Ethernet bridge, you'll need the bridge 186a2e9b73SSam Ravnborg configuration tools; see <file:Documentation/networking/bridge.txt> 196a2e9b73SSam Ravnborg for location. Please read the Bridge mini-HOWTO for more 206a2e9b73SSam Ravnborg information. 216a2e9b73SSam Ravnborg 226a2e9b73SSam Ravnborg If you enable iptables support along with the bridge support then you 236a2e9b73SSam Ravnborg turn your bridge into a bridging IP firewall. 246a2e9b73SSam Ravnborg iptables will then see the IP packets being bridged, so you need to 256a2e9b73SSam Ravnborg take this into account when setting up your firewall rules. 266a2e9b73SSam Ravnborg Enabling arptables support when bridging will let arptables see 276a2e9b73SSam Ravnborg bridged ARP traffic in the arptables FORWARD chain. 286a2e9b73SSam Ravnborg 296a2e9b73SSam Ravnborg To compile this code as a module, choose M here: the module 306a2e9b73SSam Ravnborg will be called bridge. 316a2e9b73SSam Ravnborg 326a2e9b73SSam Ravnborg If unsure, say N. 33