If unsure, say N.
+config XFRM_MIGRATE
+ bool "Transformation migrate database (EXPERIMENTAL)"
+ depends on XFRM && EXPERIMENTAL
+ ---help---
+ A feature to update locator(s) of a given IPsec security
+ association dynamically. This feature is required, for
+ instance, in a Mobile IPv6 environment with IPsec configuration
+ where mobile nodes change their attachment point to the Internet.
+
+ If unsure, say N.
+
config NET_KEY
tristate "PF_KEY sockets"
select XFRM