5 # IPv6 as module will cause a CRASH if you try to unload it
7 tristate "The IPv6 protocol"
10 This is complemental support for the IP version 6.
11 You will still be able to do traditional IPv4 networking as well.
13 For general information about IPv6, see
14 <https://en.wikipedia.org/wiki/IPv6>.
15 For Linux IPv6 development information, see <http://www.linux-ipv6.org>.
16 For specific information about IPv6 under Linux, read the HOWTO at
17 <http://www.bieringer.de/linux/IPv6/>.
19 To compile this protocol support as a module, choose M here: the
20 module will be called ipv6.
25 bool "IPv6: Privacy Extensions (RFC 3041) support"
27 Privacy Extensions for Stateless Address Autoconfiguration in IPv6
28 support. With this option, additional periodically-altered
29 pseudo-random global-scope unicast address(es) will be assigned to
32 We use our standard pseudo-random algorithm to generate the
33 randomized interface identifier, instead of one described in RFC 3041.
35 By default the kernel does not generate temporary addresses.
36 To use temporary addresses, do
38 echo 2 >/proc/sys/net/ipv6/conf/all/use_tempaddr
40 See <file:Documentation/networking/ip-sysctl.txt> for details.
42 config IPV6_ROUTER_PREF
43 bool "IPv6: Router Preference (RFC 4191) support"
45 Router Preference is an optional extension to the Router
46 Advertisement message which improves the ability of hosts
47 to pick an appropriate router, especially when the hosts
48 are placed in a multi-homed network.
52 config IPV6_ROUTE_INFO
53 bool "IPv6: Route Information (RFC 4191) support"
54 depends on IPV6_ROUTER_PREF
56 This is experimental support of Route Information.
60 config IPV6_OPTIMISTIC_DAD
61 bool "IPv6: Enable RFC 4429 Optimistic DAD"
63 This is experimental support for optimistic Duplicate
64 Address Detection. It allows for autoconfigured addresses
65 to be used more quickly.
70 tristate "IPv6: AH transformation"
82 tristate "IPv6: ESP transformation"
92 Support for IPsec ESP.
97 tristate "IPv6: IPComp transformation"
98 select INET6_XFRM_TUNNEL
101 Support for IP Payload Compression Protocol (IPComp) (RFC3173),
102 typically needed for IPsec.
107 tristate "IPv6: Mobility"
110 Support for IPv6 Mobility described in RFC 3775.
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"
159 depends on INET6_XFRM_MODE_TUNNEL
161 Tunneling means encapsulating data of one protocol type within
162 another protocol and sending it over a channel that understands the
163 encapsulating protocol. This can be used with xfrm mode tunnel to give
164 the notion of a secure tunnel for IPSEC and then use routing protocol
168 tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
171 select IPV6_NDISC_NODETYPE
174 Tunneling means encapsulating data of one protocol type within
175 another protocol and sending it over a channel that understands the
176 encapsulating protocol. This driver implements encapsulation of IPv6
177 into IPv4 packets. This is useful if you want to connect two IPv6
178 networks over an IPv4-only path.
180 Saying M here will produce a module called sit. If unsure, say Y.
183 bool "IPv6: IPv6 Rapid Deployment (6RD)"
187 IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
188 mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
189 deploy IPv6 unicast service to IPv4 sites to which it provides
190 customer premise equipment. Like 6to4, it utilizes stateless IPv6 in
191 IPv4 encapsulation in order to transit IPv4-only network
192 infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6
193 prefix of its own in place of the fixed 6to4 prefix.
195 With this option enabled, the SIT driver offers 6rd functionality by
196 providing additional ioctl API to configure the IPv6 Prefix for in
197 stead of static 2002::/16 for 6to4.
201 config IPV6_NDISC_NODETYPE
205 tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
208 Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
214 tristate "IPv6: GRE tunnel"
218 Tunneling means encapsulating data of one protocol type within
219 another protocol and sending it over a channel that understands the
220 encapsulating protocol. This particular tunneling driver implements
221 GRE (Generic Routing Encapsulation) and at this time allows
222 encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
223 This driver is useful if the other endpoint is a Cisco router: Cisco
224 likes GRE much better than the other Linux tunneling driver ("IP
225 tunneling" above). In addition, GRE allows multicast redistribution
228 Saying M here will produce a module called ip6_gre. If unsure, say N.
230 config IPV6_MULTIPLE_TABLES
231 bool "IPv6: Multiple Routing Tables"
234 Support multiple routing tables.
237 bool "IPv6: source address based routing"
238 depends on IPV6_MULTIPLE_TABLES
240 Enable routing by source address or prefix.
242 The destination address is still the primary routing key, so mixing
243 normal and source prefix specific routes in the same routing table
244 may sometimes lead to unintended routing behavior. This can be
245 avoided by defining different routing tables for the normal and
246 source prefix specific routes.
251 bool "IPv6: multicast routing"
254 Experimental support for IPv6 multicast forwarding.
257 config IPV6_MROUTE_MULTIPLE_TABLES
258 bool "IPv6: multicast policy routing"
259 depends on IPV6_MROUTE
262 Normally, a multicast router runs a userspace daemon and decides
263 what to do with a multicast packet based on the source and
264 destination addresses. If you say Y here, the multicast router
265 will also be able to take interfaces and packet marks into
266 account and run multiple instances of userspace daemons
267 simultaneously, each one handling a single table.
272 bool "IPv6: PIM-SM version 2 support"
273 depends on IPV6_MROUTE
275 Support for IPv6 PIM multicast routing protocol PIM-SMv2.