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 This is experimental support of Route Information.
41 config IPV6_OPTIMISTIC_DAD
42 bool "IPv6: Enable RFC 4429 Optimistic DAD"
44 This is experimental support for optimistic Duplicate
45 Address Detection. It allows for autoconfigured addresses
46 to be used more quickly.
51 tristate "IPv6: AH transformation"
63 tristate "IPv6: ESP transformation"
73 Support for IPsec ESP.
78 tristate "IPv6: IPComp transformation"
79 select INET6_XFRM_TUNNEL
82 Support for IP Payload Compression Protocol (IPComp) (RFC3173),
83 typically needed for IPsec.
88 tristate "IPv6: Mobility"
91 Support for IPv6 Mobility described in RFC 3775.
96 tristate "IPv6: Identifier Locator Addressing (ILA)"
99 Support for IPv6 Identifier Locator Addressing (ILA).
101 ILA is a mechanism to do network virtualization without
102 encapsulation. The basic concept of ILA is that we split an
103 IPv6 address into a 64 bit locator and 64 bit identifier. The
104 identifier is the identity of an entity in communication
105 ("who") and the locator expresses the location of the
108 ILA can be configured using the "encap ila" option with
109 "ip -6 route" command. ILA is described in
110 https://tools.ietf.org/html/draft-herbert-nvo3-ila-00.
114 config INET6_XFRM_TUNNEL
123 config INET6_XFRM_MODE_TRANSPORT
124 tristate "IPv6: IPsec transport mode"
128 Support for IPsec transport mode.
132 config INET6_XFRM_MODE_TUNNEL
133 tristate "IPv6: IPsec tunnel mode"
137 Support for IPsec tunnel mode.
141 config INET6_XFRM_MODE_BEET
142 tristate "IPv6: IPsec BEET mode"
146 Support for IPsec BEET mode.
150 config INET6_XFRM_MODE_ROUTEOPTIMIZATION
151 tristate "IPv6: MIPv6 route optimization mode"
154 Support for MIPv6 route optimization mode.
157 tristate "Virtual (secure) IPv6: tunneling"
160 depends on INET6_XFRM_MODE_TUNNEL
162 Tunneling means encapsulating data of one protocol type within
163 another protocol and sending it over a channel that understands the
164 encapsulating protocol. This can be used with xfrm mode tunnel to give
165 the notion of a secure tunnel for IPSEC and then use routing protocol
169 tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
172 select IPV6_NDISC_NODETYPE
175 Tunneling means encapsulating data of one protocol type within
176 another protocol and sending it over a channel that understands the
177 encapsulating protocol. This driver implements encapsulation of IPv6
178 into IPv4 packets. This is useful if you want to connect two IPv6
179 networks over an IPv4-only path.
181 Saying M here will produce a module called sit. If unsure, say Y.
184 bool "IPv6: IPv6 Rapid Deployment (6RD)"
188 IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
189 mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
190 deploy IPv6 unicast service to IPv4 sites to which it provides
191 customer premise equipment. Like 6to4, it utilizes stateless IPv6 in
192 IPv4 encapsulation in order to transit IPv4-only network
193 infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6
194 prefix of its own in place of the fixed 6to4 prefix.
196 With this option enabled, the SIT driver offers 6rd functionality by
197 providing additional ioctl API to configure the IPv6 Prefix for in
198 stead of static 2002::/16 for 6to4.
202 config IPV6_NDISC_NODETYPE
206 tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
209 Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
215 tristate "IPv6: GRE tunnel"
219 Tunneling means encapsulating data of one protocol type within
220 another protocol and sending it over a channel that understands the
221 encapsulating protocol. This particular tunneling driver implements
222 GRE (Generic Routing Encapsulation) and at this time allows
223 encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
224 This driver is useful if the other endpoint is a Cisco router: Cisco
225 likes GRE much better than the other Linux tunneling driver ("IP
226 tunneling" above). In addition, GRE allows multicast redistribution
229 Saying M here will produce a module called ip6_gre. If unsure, say N.
231 config IPV6_MULTIPLE_TABLES
232 bool "IPv6: Multiple Routing Tables"
235 Support multiple routing tables.
238 bool "IPv6: source address based routing"
239 depends on IPV6_MULTIPLE_TABLES
241 Enable routing by source address or prefix.
243 The destination address is still the primary routing key, so mixing
244 normal and source prefix specific routes in the same routing table
245 may sometimes lead to unintended routing behavior. This can be
246 avoided by defining different routing tables for the normal and
247 source prefix specific routes.
252 bool "IPv6: multicast routing"
255 Experimental support for IPv6 multicast forwarding.
258 config IPV6_MROUTE_MULTIPLE_TABLES
259 bool "IPv6: multicast policy routing"
260 depends on IPV6_MROUTE
263 Normally, a multicast router runs a userspace daemon and decides
264 what to do with a multicast packet based on the source and
265 destination addresses. If you say Y here, the multicast router
266 will also be able to take interfaces and packet marks into
267 account and run multiple instances of userspace daemons
268 simultaneously, each one handling a single table.
273 bool "IPv6: PIM-SM version 2 support"
274 depends on IPV6_MROUTE
276 Support for IPv6 PIM multicast routing protocol PIM-SMv2.