Starting L2TP

Enabling L2TP on an Existing Frame Relay Interface

To enable L2TP on an interface with frame relay and IP already enabled, complete the following tasks:

Site Manager Procedure

You do this

System responds

 

 

 

1.

In the Configuration Manager window,

The Edit Connector window opens.

 

choose a WAN connector.

 

 

 

 

2.

Choose Edit Circuit.

The Frame Relay Circuit Definition

 

 

 

window opens.

 

 

 

3.

Choose Services.

The Frame Relay Service List window

 

 

 

opens.

 

 

 

4.

Choose Protocols in the top left corner of

The Protocols menu opens.

 

the window.

 

 

 

 

5.

Choose Add/Delete.

The Select Protocols window opens.

 

 

 

6.

Choose L2TP, then click on OK.

The L2TP Configuration window opens.

 

 

 

7.

Set the following parameters:

 

 

RADIUS Primary Server IP Address

 

 

RADIUS Primary Server Password

 

 

RADIUS Client IP Address

 

 

 

Click on Help or see the parameter

 

 

 

descriptions beginning on page A-5.

 

 

 

 

8.

Click on OK.

The L2TP Tunneling Security window

 

 

 

opens.

 

 

 

9.

Click on OK.

The L2TP IP Interface List window opens,

 

 

 

followed by the L2TP IP Configuration

 

 

 

window.

 

 

10. Set the following parameters:

Site Manager displays a message

 

L2TP IP Interface Address

alerting you of the time delay to create

 

Subnet Mask

the L2TP tunnel circuits.

 

 

Click on Help or see the parameter

 

 

 

descriptions beginning on page A-11.

 

 

 

 

 

 

 

 

(continued)

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Nortel Networks manual Enabling L2TP on an Existing Frame Relay Interface

L2TP specifications

Nortel Networks L2TP, or Layer 2 Tunneling Protocol, is a widely recognized networking protocol that enables the tunneling of data over various networks. Initially developed as an extension of the Point-to-Point Tunneling Protocol (PPTP), L2TP integrates components from both PPTP and Layer 2 Forwarding (L2F). Nortel Networks played a significant role in the development and implementation of L2TP, making it a prominent choice for service providers and enterprise networks seeking secure and efficient connectivity.

One of the primary features of L2TP is its ability to encapsulate data packets, allowing the transport of PPP (Point-to-Point Protocol) frames without necessitating the traditional point-to-point connections. This means L2TP can operate across different networks, facilitating remote access connections and VPNs (Virtual Private Networks). As a result, organizations can achieve greater flexibility in managing their communications infrastructure.

Another key characteristic of L2TP is its support for both IPv4 and IPv6, ensuring compatibility with current and future networking environments. L2TP operates at the link layer of the OSI model, which means it functions between the data link and network layers, making it versatile for various applications. By using UDP (User Datagram Protocol) as a transport protocol, L2TP ensures efficient data transmission while maintaining lower latencies.

Security is a critical aspect of L2TP. While L2TP itself does not provide encryption, it is often paired with IPSec (Internet Protocol Security) for enhanced security protocols. This combination offers both tunneling and encryption, creating a secure framework for transmitting sensitive information across potentially insecure networks, such as the Internet.

L2TP also features various authentication methods, allowing for robust access control. It supports various schemes like PAP (Password Authentication Protocol) and CHAP (Challenge Handshake Authentication Protocol), giving network administrators a range of options to ensure the legitimacy of users accessing the network.

In summary, Nortel Networks L2TP is a powerful tunneling protocol known for its flexibility, compatibility, and security features. Its ability to encapsulate data for efficient transport makes it ideal for remote access and VPN applications. As organizations continue to demand secure, seamless connectivity, L2TP remains a resilient choice within the shifting landscape of networking technologies.