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Linux/net/l2tp/Kconfig

  1 #
  2 # Layer Two Tunneling Protocol (L2TP)
  3 #
  4 
  5 menuconfig L2TP
  6         tristate "Layer Two Tunneling Protocol (L2TP)"
  7         depends on (IPV6 || IPV6=n)
  8         depends on INET
  9         select NET_UDP_TUNNEL
 10         ---help---
 11           Layer Two Tunneling Protocol
 12 
 13           From RFC 2661 <http://www.ietf.org/rfc/rfc2661.txt>.
 14 
 15           L2TP facilitates the tunneling of packets across an
 16           intervening network in a way that is as transparent as
 17           possible to both end-users and applications.
 18 
 19           L2TP is often used to tunnel PPP traffic over IP
 20           tunnels. One IP tunnel may carry thousands of individual PPP
 21           connections. L2TP is also used as a VPN protocol, popular
 22           with home workers to connect to their offices.
 23 
 24           L2TPv3 allows other protocols as well as PPP to be carried
 25           over L2TP tunnels. L2TPv3 is defined in RFC 3931
 26           <http://www.ietf.org/rfc/rfc3931.txt>.
 27 
 28           The kernel component handles only L2TP data packets: a
 29           userland daemon handles L2TP the control protocol (tunnel
 30           and session setup). One such daemon is OpenL2TP
 31           (http://openl2tp.org/).
 32 
 33           If you don't need L2TP, say N. To compile all L2TP code as
 34           modules, choose M here.
 35 
 36 config L2TP_DEBUGFS
 37         tristate "L2TP debugfs support"
 38         depends on L2TP && DEBUG_FS
 39         help
 40           Support for l2tp directory in debugfs filesystem. This may be
 41           used to dump internal state of the l2tp drivers for problem
 42           analysis.
 43 
 44           If unsure, say 'Y'.
 45 
 46           To compile this driver as a module, choose M here. The module
 47           will be called l2tp_debugfs.
 48 
 49 config L2TP_V3
 50         bool "L2TPv3 support"
 51         depends on L2TP
 52         help
 53           Layer Two Tunneling Protocol Version 3
 54 
 55           From RFC 3931 <http://www.ietf.org/rfc/rfc3931.txt>.
 56 
 57           The Layer Two Tunneling Protocol (L2TP) provides a dynamic
 58           mechanism for tunneling Layer 2 (L2) "circuits" across a
 59           packet-oriented data network (e.g., over IP).  L2TP, as
 60           originally defined in RFC 2661, is a standard method for
 61           tunneling Point-to-Point Protocol (PPP) [RFC1661] sessions.
 62           L2TP has since been adopted for tunneling a number of other
 63           L2 protocols, including ATM, Frame Relay, HDLC and even raw
 64           ethernet frames.
 65 
 66           If you are connecting to L2TPv3 equipment, or you want to
 67           tunnel raw ethernet frames using L2TP, say Y here. If
 68           unsure, say N.
 69 
 70 config L2TP_IP
 71         tristate "L2TP IP encapsulation for L2TPv3"
 72         depends on L2TP_V3
 73         help
 74           Support for L2TP-over-IP socket family.
 75 
 76           The L2TPv3 protocol defines two possible encapsulations for
 77           L2TP frames, namely UDP and plain IP (without UDP). This
 78           driver provides a new L2TPIP socket family with which
 79           userspace L2TPv3 daemons may create L2TP/IP tunnel sockets
 80           when UDP encapsulation is not required. When L2TP is carried
 81           in IP packets, it used IP protocol number 115, so this port
 82           must be enabled in firewalls.
 83 
 84           To compile this driver as a module, choose M here. The module
 85           will be called l2tp_ip.
 86 
 87 config L2TP_ETH
 88         tristate "L2TP ethernet pseudowire support for L2TPv3"
 89         depends on L2TP_V3
 90         help
 91           Support for carrying raw ethernet frames over L2TPv3.
 92 
 93           From RFC 4719 <http://www.ietf.org/rfc/rfc4719.txt>.
 94 
 95           The Layer 2 Tunneling Protocol, Version 3 (L2TPv3) can be
 96           used as a control protocol and for data encapsulation to set
 97           up Pseudowires for transporting layer 2 Packet Data Units
 98           across an IP network [RFC3931].
 99 
100           This driver provides an ethernet virtual interface for each
101           L2TP ethernet pseudowire instance. Standard Linux tools may
102           be used to assign an IP address to the local virtual
103           interface, or add the interface to a bridge.
104 
105           If you are using L2TPv3, you will almost certainly want to
106           enable this option.
107 
108           To compile this driver as a module, choose M here. The module
109           will be called l2tp_eth.

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