Configuring L2TP Services

Modifying the L2TP Protocol Configuration

To modify how data is transmitted across an L2TP network, such as the number, frequency, and timing of data and acknowledgment packets exchanged between the LNS and LAC, you can modify the L2TP protocol parameters.

To modify the L2TP protocol configuration, complete the following tasks:

Site Manager Procedure

You do this

System responds

 

 

 

1.

In the Configuration Manager window,

The Protocols menu opens.

 

choose Protocols.

 

 

 

 

2.

Choose IP.

The IP menu opens.

 

 

 

3.

Choose L2TP.

The L2TP menu opens.

 

 

 

4.

Choose L2TP Configuration.

The L2TP Configuration List window

 

 

 

opens.

 

 

 

5.

Select an LNS entry from the list.

 

 

 

 

6.

Edit any of the following parameters:

 

 

•

Receive Window Size

 

 

•

Retransmit Timer (seconds)

 

 

•

Maximum Retransmit

 

 

•

Hello Timer (seconds)

 

 

•

Ack Timeout (milliseconds)

 

 

•

Tunnel Flow Control

 

 

 

Click on Help or see the parameter

 

 

 

descriptions beginning on page A-3.

 

 

 

 

7.

Click on Done.

You return to the Configuration Manager

 

 

 

window.

 

 

 

 

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Nortel Networks manual Modifying the L2TP Protocol Configuration, Choose L2TP Configuration
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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.
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