1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 # 2 #
3 # 802.1d Ethernet Bridging 3 # 802.1d Ethernet Bridging
4 # 4 #
5 5
6 config BRIDGE 6 config BRIDGE
7 tristate "802.1d Ethernet Bridging" 7 tristate "802.1d Ethernet Bridging"
8 select LLC 8 select LLC
9 select STP 9 select STP
10 depends on IPV6 || IPV6=n 10 depends on IPV6 || IPV6=n
11 help 11 help
12 If you say Y here, then your Linux b 12 If you say Y here, then your Linux box will be able to act as an
13 Ethernet bridge, which means that th 13 Ethernet bridge, which means that the different Ethernet segments it
14 is connected to will appear as one E 14 is connected to will appear as one Ethernet to the participants.
15 Several such bridges can work togeth 15 Several such bridges can work together to create even larger
16 networks of Ethernets using the IEEE 16 networks of Ethernets using the IEEE 802.1 spanning tree algorithm.
17 As this is a standard, Linux bridges 17 As this is a standard, Linux bridges will cooperate properly with
18 other third party bridge products. 18 other third party bridge products.
19 19
20 In order to use the Ethernet bridge, 20 In order to use the Ethernet bridge, you'll need the bridge
21 configuration tools; see <file:Docum 21 configuration tools; see <file:Documentation/networking/bridge.rst>
22 for location. Please read the Bridge 22 for location. Please read the Bridge mini-HOWTO for more
23 information. 23 information.
24 24
25 If you enable iptables support along 25 If you enable iptables support along with the bridge support then you
26 turn your bridge into a bridging IP 26 turn your bridge into a bridging IP firewall.
27 iptables will then see the IP packet 27 iptables will then see the IP packets being bridged, so you need to
28 take this into account when setting 28 take this into account when setting up your firewall rules.
29 Enabling arptables support when brid 29 Enabling arptables support when bridging will let arptables see
30 bridged ARP traffic in the arptables 30 bridged ARP traffic in the arptables FORWARD chain.
31 31
32 To compile this code as a module, ch 32 To compile this code as a module, choose M here: the module
33 will be called bridge. 33 will be called bridge.
34 34
35 If unsure, say N. 35 If unsure, say N.
36 36
37 config BRIDGE_IGMP_SNOOPING 37 config BRIDGE_IGMP_SNOOPING
38 bool "IGMP/MLD snooping" 38 bool "IGMP/MLD snooping"
39 depends on BRIDGE 39 depends on BRIDGE
40 depends on INET 40 depends on INET
41 default y 41 default y
42 help 42 help
43 If you say Y here, then the Ethernet 43 If you say Y here, then the Ethernet bridge will be able selectively
44 forward multicast traffic based on I 44 forward multicast traffic based on IGMP/MLD traffic received from
45 each port. 45 each port.
46 46
47 Say N to exclude this support and re 47 Say N to exclude this support and reduce the binary size.
48 48
49 If unsure, say Y. 49 If unsure, say Y.
50 50
51 config BRIDGE_VLAN_FILTERING 51 config BRIDGE_VLAN_FILTERING
52 bool "VLAN filtering" 52 bool "VLAN filtering"
53 depends on BRIDGE 53 depends on BRIDGE
54 depends on VLAN_8021Q 54 depends on VLAN_8021Q
55 default n 55 default n
56 help 56 help
57 If you say Y here, then the Ethernet 57 If you say Y here, then the Ethernet bridge will be able selectively
58 receive and forward traffic based on 58 receive and forward traffic based on VLAN information in the packet
59 any VLAN information configured on t 59 any VLAN information configured on the bridge port or bridge device.
60 60
61 Say N to exclude this support and re 61 Say N to exclude this support and reduce the binary size.
62 62
63 If unsure, say Y. 63 If unsure, say Y.
64 64
65 config BRIDGE_MRP 65 config BRIDGE_MRP
66 bool "MRP protocol" 66 bool "MRP protocol"
67 depends on BRIDGE 67 depends on BRIDGE
68 default n 68 default n
69 help 69 help
70 If you say Y here, then the Ethernet 70 If you say Y here, then the Ethernet bridge will be able to run MRP
71 protocol to detect loops 71 protocol to detect loops
72 72
73 Say N to exclude this support and re 73 Say N to exclude this support and reduce the binary size.
74 74
75 If unsure, say N. 75 If unsure, say N.
76 76
77 config BRIDGE_CFM 77 config BRIDGE_CFM
78 bool "CFM protocol" 78 bool "CFM protocol"
79 depends on BRIDGE 79 depends on BRIDGE
80 help 80 help
81 If you say Y here, then the Ethernet 81 If you say Y here, then the Ethernet bridge will be able to run CFM
82 protocol according to 802.1Q section 82 protocol according to 802.1Q section 12.14
83 83
84 Say N to exclude this support and re 84 Say N to exclude this support and reduce the binary size.
85 85
86 If unsure, say N. 86 If unsure, say N.
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