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"
72 select CRYPTO_ECHAINIV
74 Support for IPsec ESP.
79 tristate "IPv6: IPComp transformation"
80 select INET6_XFRM_TUNNEL
83 Support for IP Payload Compression Protocol (IPComp) (RFC3173),
84 typically needed for IPsec.
89 tristate "IPv6: Mobility"
92 Support for IPv6 Mobility described in RFC 3775.
97 tristate "IPv6: Identifier Locator Addressing (ILA)"
100 Support for IPv6 Identifier Locator Addressing (ILA).
102 ILA is a mechanism to do network virtualization without
103 encapsulation. The basic concept of ILA is that we split an
104 IPv6 address into a 64 bit locator and 64 bit identifier. The
105 identifier is the identity of an entity in communication
106 ("who") and the locator expresses the location of the
109 ILA can be configured using the "encap ila" option with
110 "ip -6 route" command. ILA is described in
111 https://tools.ietf.org/html/draft-herbert-nvo3-ila-00.
115 config INET6_XFRM_TUNNEL
124 config INET6_XFRM_MODE_TRANSPORT
125 tristate "IPv6: IPsec transport mode"
129 Support for IPsec transport mode.
133 config INET6_XFRM_MODE_TUNNEL
134 tristate "IPv6: IPsec tunnel mode"
138 Support for IPsec tunnel mode.
142 config INET6_XFRM_MODE_BEET
143 tristate "IPv6: IPsec BEET mode"
147 Support for IPsec BEET mode.
151 config INET6_XFRM_MODE_ROUTEOPTIMIZATION
152 tristate "IPv6: MIPv6 route optimization mode"
155 Support for MIPv6 route optimization mode.
158 tristate "Virtual (secure) IPv6: tunneling"
161 depends on INET6_XFRM_MODE_TUNNEL
163 Tunneling means encapsulating data of one protocol type within
164 another protocol and sending it over a channel that understands the
165 encapsulating protocol. This can be used with xfrm mode tunnel to give
166 the notion of a secure tunnel for IPSEC and then use routing protocol
170 tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
173 select IPV6_NDISC_NODETYPE
176 Tunneling means encapsulating data of one protocol type within
177 another protocol and sending it over a channel that understands the
178 encapsulating protocol. This driver implements encapsulation of IPv6
179 into IPv4 packets. This is useful if you want to connect two IPv6
180 networks over an IPv4-only path.
182 Saying M here will produce a module called sit. If unsure, say Y.
185 bool "IPv6: IPv6 Rapid Deployment (6RD)"
189 IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
190 mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
191 deploy IPv6 unicast service to IPv4 sites to which it provides
192 customer premise equipment. Like 6to4, it utilizes stateless IPv6 in
193 IPv4 encapsulation in order to transit IPv4-only network
194 infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6
195 prefix of its own in place of the fixed 6to4 prefix.
197 With this option enabled, the SIT driver offers 6rd functionality by
198 providing additional ioctl API to configure the IPv6 Prefix for in
199 stead of static 2002::/16 for 6to4.
203 config IPV6_NDISC_NODETYPE
207 tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
211 Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
217 tristate "IPv6: GRE tunnel"
221 Tunneling means encapsulating data of one protocol type within
222 another protocol and sending it over a channel that understands the
223 encapsulating protocol. This particular tunneling driver implements
224 GRE (Generic Routing Encapsulation) and at this time allows
225 encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
226 This driver is useful if the other endpoint is a Cisco router: Cisco
227 likes GRE much better than the other Linux tunneling driver ("IP
228 tunneling" above). In addition, GRE allows multicast redistribution
231 Saying M here will produce a module called ip6_gre. If unsure, say N.
233 config IPV6_MULTIPLE_TABLES
234 bool "IPv6: Multiple Routing Tables"
237 Support multiple routing tables.
240 bool "IPv6: source address based routing"
241 depends on IPV6_MULTIPLE_TABLES
243 Enable routing by source address or prefix.
245 The destination address is still the primary routing key, so mixing
246 normal and source prefix specific routes in the same routing table
247 may sometimes lead to unintended routing behavior. This can be
248 avoided by defining different routing tables for the normal and
249 source prefix specific routes.
254 bool "IPv6: multicast routing"
257 Experimental support for IPv6 multicast forwarding.
260 config IPV6_MROUTE_MULTIPLE_TABLES
261 bool "IPv6: multicast policy routing"
262 depends on IPV6_MROUTE
265 Normally, a multicast router runs a userspace daemon and decides
266 what to do with a multicast packet based on the source and
267 destination addresses. If you say Y here, the multicast router
268 will also be able to take interfaces and packet marks into
269 account and run multiple instances of userspace daemons
270 simultaneously, each one handling a single table.
275 bool "IPv6: PIM-SM version 2 support"
276 depends on IPV6_MROUTE
278 Support for IPv6 PIM multicast routing protocol PIM-SMv2.