5 # IPv6 as module will cause a CRASH if you try to unload it
7 tristate "The IPv6 protocol"
10 Support for IP version 6 (IPv6).
12 For general information about IPv6, see
13 <https://en.wikipedia.org/wiki/IPv6>.
14 For specific information about IPv6 under Linux, see
15 Documentation/networking/ipv6.txt and read the HOWTO at
16 <http://www.tldp.org/HOWTO/Linux+IPv6-HOWTO/>
18 To compile this protocol support as a module, choose M here: the
19 module will be called ipv6.
23 config IPV6_ROUTER_PREF
24 bool "IPv6: Router Preference (RFC 4191) support"
26 Router Preference is an optional extension to the Router
27 Advertisement message which improves the ability of hosts
28 to pick an appropriate router, especially when the hosts
29 are placed in a multi-homed network.
33 config IPV6_ROUTE_INFO
34 bool "IPv6: Route Information (RFC 4191) support"
35 depends on IPV6_ROUTER_PREF
37 Support of Route Information.
41 config IPV6_OPTIMISTIC_DAD
42 bool "IPv6: Enable RFC 4429 Optimistic DAD"
44 Support for optimistic Duplicate Address Detection. It allows for
45 autoconfigured addresses to be used more quickly.
50 tristate "IPv6: AH transformation"
62 tristate "IPv6: ESP transformation"
71 select CRYPTO_ECHAINIV
73 Support for IPsec ESP.
77 config INET6_ESP_OFFLOAD
78 tristate "IPv6: ESP transformation offload"
83 Support for ESP transformation offload. This makes sense
84 only if this system really does IPsec and want to do it
85 with high throughput. A typical desktop system does not
86 need it, even if it does IPsec.
91 tristate "IPv6: IPComp transformation"
92 select INET6_XFRM_TUNNEL
95 Support for IP Payload Compression Protocol (IPComp) (RFC3173),
96 typically needed for IPsec.
101 tristate "IPv6: Mobility"
104 Support for IPv6 Mobility described in RFC 3775.
109 tristate "IPv6: Identifier Locator Addressing (ILA)"
114 Support for IPv6 Identifier Locator Addressing (ILA).
116 ILA is a mechanism to do network virtualization without
117 encapsulation. The basic concept of ILA is that we split an
118 IPv6 address into a 64 bit locator and 64 bit identifier. The
119 identifier is the identity of an entity in communication
120 ("who") and the locator expresses the location of the
123 ILA can be configured using the "encap ila" option with
124 "ip -6 route" command. ILA is described in
125 https://tools.ietf.org/html/draft-herbert-nvo3-ila-00.
129 config INET6_XFRM_TUNNEL
139 tristate "Virtual (secure) IPv6: tunneling"
144 Tunneling means encapsulating data of one protocol type within
145 another protocol and sending it over a channel that understands the
146 encapsulating protocol. This can be used with xfrm mode tunnel to give
147 the notion of a secure tunnel for IPSEC and then use routing protocol
151 tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
154 select IPV6_NDISC_NODETYPE
157 Tunneling means encapsulating data of one protocol type within
158 another protocol and sending it over a channel that understands the
159 encapsulating protocol. This driver implements encapsulation of IPv6
160 into IPv4 packets. This is useful if you want to connect two IPv6
161 networks over an IPv4-only path.
163 Saying M here will produce a module called sit. If unsure, say Y.
166 bool "IPv6: IPv6 Rapid Deployment (6RD)"
170 IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
171 mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
172 deploy IPv6 unicast service to IPv4 sites to which it provides
173 customer premise equipment. Like 6to4, it utilizes stateless IPv6 in
174 IPv4 encapsulation in order to transit IPv4-only network
175 infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6
176 prefix of its own in place of the fixed 6to4 prefix.
178 With this option enabled, the SIT driver offers 6rd functionality by
179 providing additional ioctl API to configure the IPv6 Prefix for in
180 stead of static 2002::/16 for 6to4.
184 config IPV6_NDISC_NODETYPE
188 tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
193 Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
199 tristate "IPv6: GRE tunnel"
202 depends on NET_IPGRE_DEMUX
204 Tunneling means encapsulating data of one protocol type within
205 another protocol and sending it over a channel that understands the
206 encapsulating protocol. This particular tunneling driver implements
207 GRE (Generic Routing Encapsulation) and at this time allows
208 encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
209 This driver is useful if the other endpoint is a Cisco router: Cisco
210 likes GRE much better than the other Linux tunneling driver ("IP
211 tunneling" above). In addition, GRE allows multicast redistribution
214 Saying M here will produce a module called ip6_gre. If unsure, say N.
218 default NET_FOU && IPV6
220 config IPV6_FOU_TUNNEL
222 default NET_FOU_IP_TUNNELS && IPV6_FOU
225 config IPV6_MULTIPLE_TABLES
226 bool "IPv6: Multiple Routing Tables"
229 Support multiple routing tables.
232 bool "IPv6: source address based routing"
233 depends on IPV6_MULTIPLE_TABLES
235 Enable routing by source address or prefix.
237 The destination address is still the primary routing key, so mixing
238 normal and source prefix specific routes in the same routing table
239 may sometimes lead to unintended routing behavior. This can be
240 avoided by defining different routing tables for the normal and
241 source prefix specific routes.
246 bool "IPv6: multicast routing"
248 select IP_MROUTE_COMMON
250 Support for IPv6 multicast forwarding.
253 config IPV6_MROUTE_MULTIPLE_TABLES
254 bool "IPv6: multicast policy routing"
255 depends on IPV6_MROUTE
258 Normally, a multicast router runs a userspace daemon and decides
259 what to do with a multicast packet based on the source and
260 destination addresses. If you say Y here, the multicast router
261 will also be able to take interfaces and packet marks into
262 account and run multiple instances of userspace daemons
263 simultaneously, each one handling a single table.
268 bool "IPv6: PIM-SM version 2 support"
269 depends on IPV6_MROUTE
271 Support for IPv6 PIM multicast routing protocol PIM-SMv2.
274 config IPV6_SEG6_LWTUNNEL
275 bool "IPv6: Segment Routing Header encapsulation support"
279 select IPV6_MULTIPLE_TABLES
281 Support for encapsulation of packets within an outer IPv6
282 header and a Segment Routing Header using the lightweight
283 tunnels mechanism. Also enable support for advanced local
284 processing of SRv6 packets based on their active segment.
288 config IPV6_SEG6_HMAC
289 bool "IPv6: Segment Routing HMAC support"
295 Support for HMAC signature generation and verification
296 of SR-enabled packets.
302 depends on IPV6_SEG6_LWTUNNEL