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 "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
160 select IPV6_NDISC_NODETYPE
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 driver implements encapsulation of IPv6
166 into IPv4 packets. This is useful if you want to connect two IPv6
167 networks over an IPv4-only path.
169 Saying M here will produce a module called sit. If unsure, say Y.
172 bool "IPv6: IPv6 Rapid Deployment (6RD)"
176 IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
177 mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
178 deploy IPv6 unicast service to IPv4 sites to which it provides
179 customer premise equipment. Like 6to4, it utilizes stateless IPv6 in
180 IPv4 encapsulation in order to transit IPv4-only network
181 infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6
182 prefix of its own in place of the fixed 6to4 prefix.
184 With this option enabled, the SIT driver offers 6rd functionality by
185 providing additional ioctl API to configure the IPv6 Prefix for in
186 stead of static 2002::/16 for 6to4.
190 config IPV6_NDISC_NODETYPE
194 tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
197 Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in
203 tristate "IPv6: GRE tunnel"
207 Tunneling means encapsulating data of one protocol type within
208 another protocol and sending it over a channel that understands the
209 encapsulating protocol. This particular tunneling driver implements
210 GRE (Generic Routing Encapsulation) and at this time allows
211 encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure.
212 This driver is useful if the other endpoint is a Cisco router: Cisco
213 likes GRE much better than the other Linux tunneling driver ("IP
214 tunneling" above). In addition, GRE allows multicast redistribution
217 Saying M here will produce a module called ip6_gre. If unsure, say N.
219 config IPV6_MULTIPLE_TABLES
220 bool "IPv6: Multiple Routing Tables"
223 Support multiple routing tables.
226 bool "IPv6: source address based routing"
227 depends on IPV6_MULTIPLE_TABLES
229 Enable routing by source address or prefix.
231 The destination address is still the primary routing key, so mixing
232 normal and source prefix specific routes in the same routing table
233 may sometimes lead to unintended routing behavior. This can be
234 avoided by defining different routing tables for the normal and
235 source prefix specific routes.
240 bool "IPv6: multicast routing"
243 Experimental support for IPv6 multicast forwarding.
246 config IPV6_MROUTE_MULTIPLE_TABLES
247 bool "IPv6: multicast policy routing"
248 depends on IPV6_MROUTE
251 Normally, a multicast router runs a userspace daemon and decides
252 what to do with a multicast packet based on the source and
253 destination addresses. If you say Y here, the multicast router
254 will also be able to take interfaces and packet marks into
255 account and run multiple instances of userspace daemons
256 simultaneously, each one handling a single table.
261 bool "IPv6: PIM-SM version 2 support"
262 depends on IPV6_MROUTE
264 Support for IPv6 PIM multicast routing protocol PIM-SMv2.