# # IPv6 configuration # # IPv6 as module will cause a CRASH if you try to unload it menuconfig IPV6 tristate "The IPv6 protocol" default y ---help--- Support for IP version 6 (IPv6). For general information about IPv6, see . For specific information about IPv6 under Linux, see Documentation/networking/ipv6.txt and read the HOWTO at To compile this protocol support as a module, choose M here: the module will be called ipv6. if IPV6 config IPV6_ROUTER_PREF bool "IPv6: Router Preference (RFC 4191) support" ---help--- Router Preference is an optional extension to the Router Advertisement message which improves the ability of hosts to pick an appropriate router, especially when the hosts are placed in a multi-homed network. If unsure, say N. config IPV6_ROUTE_INFO bool "IPv6: Route Information (RFC 4191) support" depends on IPV6_ROUTER_PREF ---help--- This is experimental support of Route Information. If unsure, say N. config IPV6_OPTIMISTIC_DAD bool "IPv6: Enable RFC 4429 Optimistic DAD" ---help--- This is experimental support for optimistic Duplicate Address Detection. It allows for autoconfigured addresses to be used more quickly. If unsure, say N. config INET6_AH tristate "IPv6: AH transformation" select XFRM_ALGO select CRYPTO select CRYPTO_HMAC select CRYPTO_MD5 select CRYPTO_SHA1 ---help--- Support for IPsec AH. If unsure, say Y. config INET6_ESP tristate "IPv6: ESP transformation" select XFRM_ALGO select CRYPTO select CRYPTO_AUTHENC select CRYPTO_HMAC select CRYPTO_MD5 select CRYPTO_CBC select CRYPTO_SHA1 select CRYPTO_DES select CRYPTO_ECHAINIV ---help--- Support for IPsec ESP. If unsure, say Y. config INET6_IPCOMP tristate "IPv6: IPComp transformation" select INET6_XFRM_TUNNEL select XFRM_IPCOMP ---help--- Support for IP Payload Compression Protocol (IPComp) (RFC3173), typically needed for IPsec. If unsure, say Y. config IPV6_MIP6 tristate "IPv6: Mobility" select XFRM ---help--- Support for IPv6 Mobility described in RFC 3775. If unsure, say N. config IPV6_ILA tristate "IPv6: Identifier Locator Addressing (ILA)" depends on NETFILTER select LWTUNNEL ---help--- Support for IPv6 Identifier Locator Addressing (ILA). ILA is a mechanism to do network virtualization without encapsulation. The basic concept of ILA is that we split an IPv6 address into a 64 bit locator and 64 bit identifier. The identifier is the identity of an entity in communication ("who") and the locator expresses the location of the entity ("where"). ILA can be configured using the "encap ila" option with "ip -6 route" command. ILA is described in https://tools.ietf.org/html/draft-herbert-nvo3-ila-00. If unsure, say N. config INET6_XFRM_TUNNEL tristate select INET6_TUNNEL default n config INET6_TUNNEL tristate default n config INET6_XFRM_MODE_TRANSPORT tristate "IPv6: IPsec transport mode" default IPV6 select XFRM ---help--- Support for IPsec transport mode. If unsure, say Y. config INET6_XFRM_MODE_TUNNEL tristate "IPv6: IPsec tunnel mode" default IPV6 select XFRM ---help--- Support for IPsec tunnel mode. If unsure, say Y. config INET6_XFRM_MODE_BEET tristate "IPv6: IPsec BEET mode" default IPV6 select XFRM ---help--- Support for IPsec BEET mode. If unsure, say Y. config INET6_XFRM_MODE_ROUTEOPTIMIZATION tristate "IPv6: MIPv6 route optimization mode" select XFRM ---help--- Support for MIPv6 route optimization mode. config IPV6_VTI tristate "Virtual (secure) IPv6: tunneling" select IPV6_TUNNEL select NET_IP_TUNNEL depends on INET6_XFRM_MODE_TUNNEL ---help--- Tunneling means encapsulating data of one protocol type within another protocol and sending it over a channel that understands the encapsulating protocol. This can be used with xfrm mode tunnel to give the notion of a secure tunnel for IPSEC and then use routing protocol on top. config IPV6_SIT tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)" select INET_TUNNEL select NET_IP_TUNNEL select IPV6_NDISC_NODETYPE default y ---help--- Tunneling means encapsulating data of one protocol type within another protocol and sending it over a channel that understands the encapsulating protocol. This driver implements encapsulation of IPv6 into IPv4 packets. This is useful if you want to connect two IPv6 networks over an IPv4-only path. Saying M here will produce a module called sit. If unsure, say Y. config IPV6_SIT_6RD bool "IPv6: IPv6 Rapid Deployment (6RD)" depends on IPV6_SIT default n ---help--- IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly deploy IPv6 unicast service to IPv4 sites to which it provides customer premise equipment. Like 6to4, it utilizes stateless IPv6 in IPv4 encapsulation in order to transit IPv4-only network infrastructure. Unlike 6to4, a 6rd service provider uses an IPv6 prefix of its own in place of the fixed 6to4 prefix. With this option enabled, the SIT driver offers 6rd functionality by providing additional ioctl API to configure the IPv6 Prefix for in stead of static 2002::/16 for 6to4. If unsure, say N. config IPV6_NDISC_NODETYPE bool config IPV6_TUNNEL tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)" select INET6_TUNNEL select DST_CACHE select GRO_CELLS ---help--- Support for IPv6-in-IPv6 and IPv4-in-IPv6 tunnels described in RFC 2473. If unsure, say N. config IPV6_GRE tristate "IPv6: GRE tunnel" select IPV6_TUNNEL select NET_IP_TUNNEL depends on NET_IPGRE_DEMUX ---help--- Tunneling means encapsulating data of one protocol type within another protocol and sending it over a channel that understands the encapsulating protocol. This particular tunneling driver implements GRE (Generic Routing Encapsulation) and at this time allows encapsulating of IPv4 or IPv6 over existing IPv6 infrastructure. This driver is useful if the other endpoint is a Cisco router: Cisco likes GRE much better than the other Linux tunneling driver ("IP tunneling" above). In addition, GRE allows multicast redistribution through the tunnel. Saying M here will produce a module called ip6_gre. If unsure, say N. config IPV6_FOU tristate default NET_FOU && IPV6 config IPV6_FOU_TUNNEL tristate default NET_FOU_IP_TUNNELS && IPV6_FOU select IPV6_TUNNEL config IPV6_MULTIPLE_TABLES bool "IPv6: Multiple Routing Tables" select FIB_RULES ---help--- Support multiple routing tables. config IPV6_SUBTREES bool "IPv6: source address based routing" depends on IPV6_MULTIPLE_TABLES ---help--- Enable routing by source address or prefix. The destination address is still the primary routing key, so mixing normal and source prefix specific routes in the same routing table may sometimes lead to unintended routing behavior. This can be avoided by defining different routing tables for the normal and source prefix specific routes. If unsure, say N. config IPV6_MROUTE bool "IPv6: multicast routing" depends on IPV6 ---help--- Experimental support for IPv6 multicast forwarding. If unsure, say N. config IPV6_MROUTE_MULTIPLE_TABLES bool "IPv6: multicast policy routing" depends on IPV6_MROUTE select FIB_RULES help Normally, a multicast router runs a userspace daemon and decides what to do with a multicast packet based on the source and destination addresses. If you say Y here, the multicast router will also be able to take interfaces and packet marks into account and run multiple instances of userspace daemons simultaneously, each one handling a single table. If unsure, say N. config IPV6_PIMSM_V2 bool "IPv6: PIM-SM version 2 support" depends on IPV6_MROUTE ---help--- Support for IPv6 PIM multicast routing protocol PIM-SMv2. If unsure, say N. config IPV6_SEG6_LWTUNNEL bool "IPv6: Segment Routing Header encapsulation support" depends on IPV6 select LWTUNNEL ---help--- Support for encapsulation of packets within an outer IPv6 header and a Segment Routing Header using the lightweight tunnels mechanism. If unsure, say N. config IPV6_SEG6_INLINE bool "IPv6: direct Segment Routing Header insertion " depends on IPV6_SEG6_LWTUNNEL ---help--- Support for direct insertion of the Segment Routing Header, also known as inline mode. Be aware that direct insertion of extension headers (as opposed to encapsulation) may break multiple mechanisms such as PMTUD or IPSec AH. Use this feature only if you know exactly what you are doing. If unsure, say N. config IPV6_SEG6_HMAC bool "IPv6: Segment Routing HMAC support" depends on IPV6 select CRYPTO_HMAC select CRYPTO_SHA1 select CRYPTO_SHA256 ---help--- Support for HMAC signature generation and verification of SR-enabled packets. If unsure, say N. endif # IPV6