Hamzeh, K., et al.: Layer Two Tunneling Protocol (L2TP), Internet Draft draftietf -pppext-l2tp-08.txt -- work in progress, (Nov. 1997).  Home/Search   Document Not in Database   Summary   Related Articles

....be necessary in order to carry non IP traffic (e.g. IPX or Appletalk) across the Internet, or even to carry an encrypted packet within another packet directed at an intervening firewall. Tunneling service may either be provided at Layer 2 or at Layer 3. Layer 2 tunneling mechanisms (e.g. L2TP [11]) transfer PPP packets (encapsulating IP, IPX etc) across the Internet or other transport media. Layer 3 tunneling mechanisms, on the other hand, directly encapsulate network layer packets (e.g. IP, IPX) in IP. A number of Layer 3 tunneling protocols have been proposed (TEP [4] TSP [18] that ....

....mechanisms, on the other hand, directly encapsulate network layer packets (e.g. IP, IPX) in IP. A number of Layer 3 tunneling protocols have been proposed (TEP [4] TSP [18] that extend the basic Mobile IP protocol to allow chaining of multiple tunnel segments. All of these tunneling proposals ([11, 4, 18]) rely on IPSec to provide confidentiality, integrity and authenticity when the transport medium is the Internet. Currently, L2TP seems to have captured the largest mindshare among VPN technologies. Nevertheless, we feel that Layer 3 tunneling offers a superior solution especially when the ....

Hamzeh, K., et al.: Layer Two Tunneling Protocol (L2TP), Internet Draft draftietf -pppext-l2tp-08.txt -- work in progress, (Nov. 1997).

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