Solved

L2TP protocol

Posted on 2002-05-15
5
1,157 Views
Last Modified: 2012-06-27
What is L2TP protocol ?
When do we use , and for what ?
Is it the CISCO proprietary ?
Is it the Protocol for VPN session ??

thanks in advances.
0
Comment
Question by:leumas
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 3

Accepted Solution

by:
cincin77 earned 50 total points
ID: 7013350
L2TP is a tunneling protocol.
It is not Cisco proprietary.
It is a protocol used in one type of the VPNs; layer 2 VPNs.

Let me explain:
When you connect to the internet and connect to a host in the internet, you go through several ISPs so several routers, switches etc. Another way to connect to that machine is a through a modem connection. Your modem calls a modem connected to your target machine.

Tunneling in the internet emulates this modem connection. Although you go through several intermediate machines in order to reach your target machine in the inernet, if you use a layer 2 tunneling protocol like L2TP, you feel like you are directly connected to your target.

L2TP creates a new packet which includes your original packet(so for example if you are part of a network in which private IPs are used, you are connceted to the target with this 'non-routable in the internet' IP address.). As this is a layer 2 tuneling protocol, you are like in that target LAN.

regards...
0
 

Author Comment

by:leumas
ID: 7013365
So L2TP looks like IPSEC ?? Is that right ?
0
 
LVL 3

Expert Comment

by:cincin77
ID: 7013371
no.
IPSEC is a tunneling protocol in layer 3.
You cannot carry anything but IP over IPSEC. With L2TP os a nother tunneling protocol in layer 2 you can carry IP, Netbios, IPX ....
0
 

Author Comment

by:leumas
ID: 7276505
Thanks so much cincin
0
 

Author Comment

by:leumas
ID: 7276533
Thanks sir.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Creating an OSPF network that automatically (dynamically) reroutes network traffic over other connections to prevent network downtime.
Shadow IT is coming out of the shadows as more businesses are choosing cloud-based applications. It is now a multi-cloud world for most organizations. Simultaneously, most businesses have yet to consolidate with one cloud provider or define an offic…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

737 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question