1fd558d18SJames Chapman# 2fd558d18SJames Chapman# Layer Two Tunneling Protocol (L2TP) 3fd558d18SJames Chapman# 4fd558d18SJames Chapman 5fd558d18SJames Chapmanmenuconfig L2TP 6fd558d18SJames Chapman tristate "Layer Two Tunneling Protocol (L2TP)" 7fd558d18SJames Chapman depends on INET 8fd558d18SJames Chapman ---help--- 9fd558d18SJames Chapman Layer Two Tunneling Protocol 10fd558d18SJames Chapman 11fd558d18SJames Chapman From RFC 2661 <http://www.ietf.org/rfc/rfc2661.txt>. 12fd558d18SJames Chapman 13fd558d18SJames Chapman L2TP facilitates the tunneling of packets across an 14fd558d18SJames Chapman intervening network in a way that is as transparent as 15fd558d18SJames Chapman possible to both end-users and applications. 16fd558d18SJames Chapman 17fd558d18SJames Chapman L2TP is often used to tunnel PPP traffic over IP 18fd558d18SJames Chapman tunnels. One IP tunnel may carry thousands of individual PPP 19fd558d18SJames Chapman connections. L2TP is also used as a VPN protocol, popular 20fd558d18SJames Chapman with home workers to connect to their offices. 21fd558d18SJames Chapman 22*f7faffa3SJames Chapman L2TPv3 allows other protocols as well as PPP to be carried 23*f7faffa3SJames Chapman over L2TP tunnels. L2TPv3 is defined in RFC 3931 24*f7faffa3SJames Chapman <http://www.ietf.org/rfc/rfc3931.txt>. 25*f7faffa3SJames Chapman 26fd558d18SJames Chapman The kernel component handles only L2TP data packets: a 27fd558d18SJames Chapman userland daemon handles L2TP the control protocol (tunnel 28fd558d18SJames Chapman and session setup). One such daemon is OpenL2TP 29fd558d18SJames Chapman (http://openl2tp.org/). 30fd558d18SJames Chapman 31fd558d18SJames Chapman If you don't need L2TP, say N. To compile all L2TP code as 32fd558d18SJames Chapman modules, choose M here. 33*f7faffa3SJames Chapman 34*f7faffa3SJames Chapmanconfig L2TP_V3 35*f7faffa3SJames Chapman bool "L2TPv3 support (EXPERIMENTAL)" 36*f7faffa3SJames Chapman depends on EXPERIMENTAL && L2TP 37*f7faffa3SJames Chapman help 38*f7faffa3SJames Chapman Layer Two Tunneling Protocol Version 3 39*f7faffa3SJames Chapman 40*f7faffa3SJames Chapman From RFC 3931 <http://www.ietf.org/rfc/rfc3931.txt>. 41*f7faffa3SJames Chapman 42*f7faffa3SJames Chapman The Layer Two Tunneling Protocol (L2TP) provides a dynamic 43*f7faffa3SJames Chapman mechanism for tunneling Layer 2 (L2) "circuits" across a 44*f7faffa3SJames Chapman packet-oriented data network (e.g., over IP). L2TP, as 45*f7faffa3SJames Chapman originally defined in RFC 2661, is a standard method for 46*f7faffa3SJames Chapman tunneling Point-to-Point Protocol (PPP) [RFC1661] sessions. 47*f7faffa3SJames Chapman L2TP has since been adopted for tunneling a number of other 48*f7faffa3SJames Chapman L2 protocols, including ATM, Frame Relay, HDLC and even raw 49*f7faffa3SJames Chapman ethernet frames. 50*f7faffa3SJames Chapman 51*f7faffa3SJames Chapman If you are connecting to L2TPv3 equipment, or you want to 52*f7faffa3SJames Chapman tunnel raw ethernet frames using L2TP, say Y here. If 53*f7faffa3SJames Chapman unsure, say N. 54