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)"
101 Support for IPv6 Identifier Locator Addressing (ILA).
103 ILA is a mechanism to do network virtualization without
104 encapsulation. The basic concept of ILA is that we split an
105 IPv6 address into a 64 bit locator and 64 bit identifier. The
106 identifier is the identity of an entity in communication
107 ("who") and the locator expresses the location of the
110 ILA can be configured using the "encap ila" option with
111 "ip -6 route" command. ILA is described in
112 https://tools.ietf.org/html/draft-herbert-nvo3-ila-00.
116 config INET6_XFRM_TUNNEL
125 config INET6_XFRM_MODE_TRANSPORT
126 tristate "IPv6: IPsec transport mode"
130 Support for IPsec transport mode.
134 config INET6_XFRM_MODE_TUNNEL
135 tristate "IPv6: IPsec tunnel mode"
139 Support for IPsec tunnel mode.
143 config INET6_XFRM_MODE_BEET
144 tristate "IPv6: IPsec BEET mode"
148 Support for IPsec BEET mode.
152 config INET6_XFRM_MODE_ROUTEOPTIMIZATION
153 tristate "IPv6: MIPv6 route optimization mode"
156 Support for MIPv6 route optimization mode.
159 tristate "Virtual (secure) IPv6: tunneling"
162 depends on INET6_XFRM_MODE_TUNNEL
164 Tunneling means encapsulating data of one protocol type within
165 another protocol and sending it over a channel that understands the
166 encapsulating protocol. This can be used with xfrm mode tunnel to give
167 the notion of a secure tunnel for IPSEC and then use routing protocol
171 tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
174 select IPV6_NDISC_NODETYPE
177 Tunneling means encapsulating data of one protocol type within
178 another protocol and sending it over a channel that understands the
179 encapsulating protocol. This driver implements encapsulation of IPv6
180 into IPv4 packets. This is useful if you want to connect two IPv6
181 networks over an IPv4-only path.
183 Saying M here will produce a module called sit. If unsure, say Y.
186 bool "IPv6: IPv6 Rapid Deployment (6RD)"
190 IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
191 mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
192 deploy IPv6 unicast service to IPv4 sites to which it provides
193 customer premise equipment. Like 6to4, it utilizes stateless IPv6 in
194 IPv4 encapsulation in order to transit IPv4-only network
195 infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6
196 prefix of its own in place of the fixed 6to4 prefix.
198 With this option enabled, the SIT driver offers 6rd functionality by
199 providing additional ioctl API to configure the IPv6 Prefix for in
200 stead of static 2002::/16 for 6to4.
204 config IPV6_NDISC_NODETYPE
208 tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
212 Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
218 tristate "IPv6: GRE tunnel"
222 Tunneling means encapsulating data of one protocol type within
223 another protocol and sending it over a channel that understands the
224 encapsulating protocol. This particular tunneling driver implements
225 GRE (Generic Routing Encapsulation) and at this time allows
226 encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
227 This driver is useful if the other endpoint is a Cisco router: Cisco
228 likes GRE much better than the other Linux tunneling driver ("IP
229 tunneling" above). In addition, GRE allows multicast redistribution
232 Saying M here will produce a module called ip6_gre. If unsure, say N.
234 config IPV6_MULTIPLE_TABLES
235 bool "IPv6: Multiple Routing Tables"
238 Support multiple routing tables.
241 bool "IPv6: source address based routing"
242 depends on IPV6_MULTIPLE_TABLES
244 Enable routing by source address or prefix.
246 The destination address is still the primary routing key, so mixing
247 normal and source prefix specific routes in the same routing table
248 may sometimes lead to unintended routing behavior. This can be
249 avoided by defining different routing tables for the normal and
250 source prefix specific routes.
255 bool "IPv6: multicast routing"
258 Experimental support for IPv6 multicast forwarding.
261 config IPV6_MROUTE_MULTIPLE_TABLES
262 bool "IPv6: multicast policy routing"
263 depends on IPV6_MROUTE
266 Normally, a multicast router runs a userspace daemon and decides
267 what to do with a multicast packet based on the source and
268 destination addresses. If you say Y here, the multicast router
269 will also be able to take interfaces and packet marks into
270 account and run multiple instances of userspace daemons
271 simultaneously, each one handling a single table.
276 bool "IPv6: PIM-SM version 2 support"
277 depends on IPV6_MROUTE
279 Support for IPv6 PIM multicast routing protocol PIM-SMv2.