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