RFC 2661:Layer Two Tunneling Protocol "L2TP"
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network


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... point-to-point links. Typically, a user obtains a L2 connection to a Network Access Server (NAS) using one of a number of techniques (e.g., dialup ...
... PPP endpoints to reside on different devices interconnected by a packet-switched network. With L2TP, a user has an L2 connection to an access ...
... RFC1990] requires that all channels composing a multilink bundle be grouped at a single Network Access Server (NAS). Due to its ability to project a PPP ...
... Digital Subscriber Line (DSL) Access Module. A network device used in the deployment of DSL ...
... L2TP tunnel endpoint and is a peer to the L2TP Network Server (LNS). The LAC sits between an ...
... link. L2TP Network Server (LNS) ...
... MD) A network or networks under the control of a single administration, policy or system. For example, an LNS ...
... A network or networks under the control of a single administration, policy or system. For example, an LNS's Management ...
... Management Domain might be the corporate network it serves. An LAC's Management ...
... and manages it. Network Access Server (NAS) ...
... NAS) A device providing local network access to users across a remote access network such as the PSTN ...
... A device providing local network access to users across a remote access network such as the PSTN. An NAS may also serve as an LAC ...
... An end-system or router attached to a remote access network (i.e. a PSTN), which is either the initiator ...


... Management Domain as if the user were connected to a Network Access Server directly. A LAC Client ...


... All values are placed into their respective fields and sent in network order (high order octets first). ...


... Vendor ID: The IANA assigned "SMI Network Management Private Enterprise Codes" [RFC1700] value. The value 0, corresponding to ...
... RFC2138] which was taken from the "Mixing in the Plaintext" section in the book "Network Security" by Kaufman, Perlman and Speciner [KPS]. A detailed explanation of the method ...
... LNS MAY treat the PPP session as well as network traffic through this session in a special manner determined by the peer. ...
... For example, if the LNS is individually connected to several private networks using unregistered addresses, this AVP ...
... included by the LAC to indicate that a given call should be associated with one of the private networks. The Private Group ...


... control connection messages are used to establish, clear and maintain L2TP tunnels. All data is sent in network order (high order octets first). Any "reserved" or "empty" fields MUST be sent as 0 values to allow for protocol extensibility ...


... modems are involved. Calling Number, Called Number, and Subaddress may be included in the message if they are available from the telephone network. Once the LAC ...
... from the LNS but it does not necessarily answer the call from the telephone network yet. The LNS may choose not to accept the call if: ...


... IPsec implementation. These features allow filtering of packets based upon network and transport layer characteristics such as IP address ...
... filtering is logically performed at the PPP layer or network layer above L2TP ...
... layer above L2TP. These network layer access control features may be ...
... upon the authenticated PPP user, or at the network layer itself by using IPsec ...


... Signaling System No. 1 (DSS 1) - ISDN user-network interface layer 3 specification for basic call control", Rec. Q.931(I.451), May 1998 ...
... Kaufman, C., Perlman, R., and Speciner, M., "Network Security: Private Communications in a Public World", Prentice Hall, March 1995, ISBN 0-13-061466-1 ...


... Bill Palter RedBack Networks, Inc 1389 Moffett Park Drive Sunnyvale, CA ...



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