IPv6: IPComp transformation

modulename: ipcomp6.ko

configname: CONFIG_INET6_IPCOMP

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>The IPv6 protocol
└─>IPv6: IPComp transformation
In linux kernel since version 2.6.12  
Support for IP Payload Compression Protocol (IPComp) (RFC3173),
typically needed for IPsec.

If unsure, say Y.

source code:
net/ipv6/ipcomp6.c