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