I am trying to find differences between PPPoE and L2TP.Both are tunneling protocols. When to use what?

thanks, GL

  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can provide and accept your own answer. – Ron Maupin Feb 19 '18 at 3:09

The most and noticeable different is layer of tunneling. PPPOE is a Layer 2 (Data Link Layer) tunneling protocol while L2TP is a Layer 3 (Network Layer) tunneling protocol. This means that PPPOE can create a tunnel between devices in a broadcast domain (such as devices connect to the same switch) but L2TP can create a tunnel between two IP-based device anywhere in the world (if they are reachable from each other).

Suppose there are two computer A and B which are connected to a R:

A <------> R <--------> B

A cannot tunnels to B using PPPOE because A and B are not in the same broadcast domain but a tunnel could be created using L2TP protocol.

Other differences are in authentication and encryption methods which L2TP is more flexible in authentication and is more secure in encryption.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.