Layer 2 tunneling protocol Oct 6, 2023 · L2TP VPN (Layer 2 Tunneling Protocol) is one of the oldest VPN protocols. Each L2TP session transports PPP frames, irrespective of link-layer encapsulation, allows the LNS to terminate PPP sessions that were PPPoE. Oct 3, 2025 · 7. It works by encapsulating data packets to be sent over a public network, such as the internet, while maintaining the privacy and integrity of the data. The prowess that L2TP can leverage for connectivity is of interest to VPNs, while ISPs can foster VPN operations with it. While it provides decent security, it can be slower than other protocols due to its double encapsulation Jun 30, 2025 · Layer 2 Tunneling Protocol (L2TP) creates a point‑to‑point tunnel; IPSec then provides encryption and authentication. (Layer 2 Forwarding, L2F, [RFC2341] was defined as "version 1". The Layer 2 PDUs (for example, BPDUs) coming into Switch B from Customer Y in Site 1 are forwarded to the infrastructure as double-tagged packets with the well-known MAC address as The Layer 2 Tunneling Protocol (L2TP) allows the transmission of frames between two nodes. It operates at the data link layer of the OSI model and is often used in conjunction with IPsec to provide a secure connection. Layer 2 Tunneling Protocol In computer networking, Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery of services by ISPs. This document describes the Layer Two Tunneling Protocol (L2TP). 1. Study with Quizlet and memorize flashcards containing terms like What is Layer 2 Tunneling Protocol (L2TP)?, At which layer does L2TP operate?, What networking protocols can L2TP support? and more. L2TP packets that have a larger MTU size than what the LAC egress ports allows are dropped. Which of the following describes Layer 2 Tunneling Protocol (L2TP)? Question 10 options: A) A. It documents kernel APIs for application developers who want to use the L2TP subsystem and it provides some technical details about the internal implementation which may be useful to kernel developers and maintainers. By Layer 2 Tunneling Protocol (L2TP) connections, which are also called virtual lines, provide cost-effective access for remote users by allowing a corporate network systems to manage the IP addresses assigned to its remote users. L2TP is a tunneling protocol, often used to support VPNs, which encapsulates data for secure transmission over public networks. ) At times, L2TP Aug 20, 2012 · L2TP Layer 2 Tunnel Protocol (L2TP) acts like a data link (Layer 2) protocol for tunneling network traffic between two peers over an existing network (usually the Internet). L2TP is the outcome of combining two older protocols: Microsoft’s Point-to-Point Tunneling (PPTP) and Cisco’s Layer 2 Forwarding Layer 2 and Layer 3 tunneling involve the use of tunneling protocols that correspond to the data link layer and the network layer in the Open System Interconnection (OSI) model. Layer 2 Tunneling Protocol (L2TP) allows for PPP sessions to be carried over an IP network. Essentially, traffic gets encapsulated twice: first by L2TP, then by IPSec ESP. Jun 22, 2021 · PPTP is a data-link layer protocol for wide area networks (WANs) based on the Point-to-Point Protocol (PPP) and developed by Microsoft that enables network traffic to be encapsulated and routed over an unsecured public network such as the Internet. How does L2TP work? Jun 26, 2025 · The Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol designed to facilitate secure connections between remote users and corporate networks. Because L2TP does not provide strong encryption or authentication by itself, another protocol called IPsec is most often used in conjunction with L2TP. Layer 2 Tunneling Protocol (L2TP) とは、 コンピュータネットワーク において Virtual Private Network (VPN)をサポートするために用いられる トンネリングプロトコル である。 Aug 11, 2025 · The Layer 2 Tunneling Protocol (L2TP) represents an evolution of PPTP and L2F and is standardized in various RFCs. By contrast, IPsec, IP-in-IP, and GRE operate at the network layer. However, it only provides tunneling – bundling up data for private transportation over public networks. Developed as a combination of Cisco’s Layer 2 Forwarding Protocol (L2F) and Microsoft’s Point-to-Point Tunneling Protocol (PPTP), L2TP allows the creation of secure, private connections over the public internet or Display Filter Reference: Layer 2 Tunneling Protocol Protocol field name: l2tp Versions: 1. As a media-independent tunneling protocol, L2F laid the groundwork for secure, remote network access, allowing data to traverse through public networks like the Internet with the confidentiality of a private network. In other words, L2TP (Layer 2 Tunnel Protocol) is an up-and-coming IETF (Internet Engineering Task Force) standard that came in front with the traits of two on-hand tunneling protocols, named as: Cisco’s L2F (Layer 2 Forwarding) and Microsoft’s PPTP (Point-to-Point Tunneling Protocol). 1Q tunneling. Apr 22, 2023 · Layer 2 Tunneling Protocol (L2TP) is a network protocol that allows for the creation of virtual private networks (VPNs). However, on its own, L2TP doesn’t encrypt your data, which means anyone with access to that virtual tunnel could still see what you’re using your connection for. One example that many VPN users may find obscure is the Layer 2 Tunneling Protocol (L2TP). Generic Routing Encapsulation (GRE) Generic Routing Encapsulation is a method of encapsulation of IP packets in a GRE header that hides the original IP packet. Instead, they rely on other security protocols, such as IPSec, to encrypt their data. Layer 2 Tunneling Protocol (L2TP) is a network protocol used to support virtual private networks (VPNs) or as part of the delivery of services by ISPs. Because L2TP doesn’t encrypt traffic by itself, it’s usually combined with IPSec to provide data encryption Layer 2 Tunneling Protocol (L2TP) is a protocol for tunneling Layer 2 traffic over a Layer 3 network. Picture this: you’re a digital spy navigating the treacherous terrain of Layer 2 protocol tunneling can be used independently or can enhance IEEE 802. Clearing the DF bit will allow downstream routers to fragment the L2TP packets. Designed as an improvement over PPTP, it adds stronger authentication, reliability, and compatibility with different network types. Its ability to carry almost any L2 data format over IP or other L3 networks makes it Overview of Layer 2 Tunneling Protocol Layer 2 Tunneling Protocol (L2TP) serves as a fundamental framework for secure internet communication. Sometimes Internet Service Providers (ISPs) use it to deliver their services as well. Layer 2 Tunneling Protocol Version 3 ist eine Weiterentwicklung von L2TP, das eine Alternative zum MPLS -Protokoll zur Verkapselung von verschiedenen Protokollen auf der Ebene 2 des OSI-Modells darstellt. What is Layer 2 Tunneling (L2TP) Protocol? Used to create a tunnel for Layer 2 traffic over a layer 3 network - like building a virtual pipe inside a larger pipe. At its core, L2TP serves to support virtual private networks (VPNs) and Internet Service Provider (ISP) services, making it a vital tool in modern networking. A tunnel is not encrypted by default: the TCP/IP protocol chosen determines the level of security. On the Security tab, Select Layer 2 Tunneling Protocol with IPsec (L2TP/IPsec), under Data encryption, select Require encryption (disconnect if server declines). Together with IPsec, it can be used for secure VPN connections. L2TP was created to replace the PTPP VPN Protocol, which is the oldest method for implementing virtual private networks. Sep 21, 2025 · The Layer 2 Tunneling Protocol (L2TP) creates secure VPN tunnels when paired with IPsec. Layer 2 Tunneling Protocol (L2TP) is a network protocol that enables the creation of virtual private networks (VPNs) by encapsulating data packets from one network to another. Explore Layer 2 Tunneling Protocol (L2TP), its use, and how it establishes secure connections for VPNs over the internet. What is L2TP (Layer 2 Tunneling Protocol)? L2TP, or Layer 2 Tunneling Protocol, is a tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery of services by internet service providers. Asymmetric links connect the customers in Site 1 to edge devices in the service-provider network. The LAC itself will not fragment L2TP packets. Further, L2TP connections provide secure access to your system or network when you use them in conjunction with IP Security (IPsec). You should learn how layer-2 tunneling protocols work to get the most from your network connection. L2TP was first proposed in 1999 as an upgrade to both L2F (Layer 2 Forwarding Protocol) and PPTP (Point-to-Point Tunneling Protocol). Jul 12, 2025 · L2TP stands for Layer 2 Tunneling Protocol, published in 2000 as proposed standard RFC 2661. Nov 5, 2022 · The Layer 2 Tunneling Protocol Version 3 feature expands Cisco’s support of Layer 2 VPNs. You can use L2TP to enable Point-to-Point Protocol (PPP) tunneling within your network. Use Layer 2 protocol tunneling (L2PT) to tunnel supported Layer 2 protocols across a network to devices that are not part of the local broadcast domain. Jan 10, 2024 · Note: If you want to set up a L2TP client in Windows 7, please follow the step9-10 like below: Right Click on VPN Connection and select Properties. Layer 2 Tunnel Protocol (L2TP) acts like a data link (Layer 2) protocol for tunneling network traffic between two peers over an existing network (usually the Internet). Layer 2 Tunneling Protocol (L2TP) provides a tunneling mechanism to transport data over the internet, while IPsec (Internet Protocol Security) offers security services to encrypt the data being transmitted. and more. Learn about L2TP's features, advantages, and limitations to help you make informed decisions about your network infrastructure. Layer 2 protocol tunneling supports a maximum packet rate of 10 packets ps (per interface) for a protocol, and 100 packets ps for all protocols (on all interfaces). This can be pretty useful…For example, let’s say you have two remote sites and an application that requires that hosts are on the same subnet. 25, frame relay, or Asynchronous Transfer Mode (ATM) networks. 第二層隧道協定 （英語： Layer Two Tunneling Protocol，縮寫為L2TP）是一種 虛擬隧道協定，通常用於 虛擬私人網路。L2TP協定自身不提供 加密 與可靠性驗證的功能，可以和 安全協定 搭配使用，從而實現資料的加密傳輸。經常與L2TP協定搭配的加密協定是 IPsec，當這兩個協定搭配使用時，通常合稱L2TP/IPsec In computer networking, Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery of services by ISPs. The Layer 2 Tunneling Protocol (L2TP) in combination with Internet Protocol Security (IPsec) is a commonly used VPN protocol that provides secure and encrypted communication between a user’s device and a VPN server. RFC 3931 L2TPv3 March 2005 contain any pseudowire-type specific details that are outside the scope of this base specification. SSH operates at layer 7 of the OSI model, the application layer. To ensure security and privacy, L2TP must rely on an encryption protocol to pass within the tunnel. L2TP encapsulates data within a tunnel, allowing for the safe passage of information. Aug 30, 2019 · See the Layer 2 Protocol Tunneling Figure 1 with Customer X and Customer Y in access VLANs 30 and 40, respectively. It enables the transport of data across different network types. The two endpoints of an L2TP tunnel are the initiator of the tunnel L2TP Access Concentrator (LAC) and the L2TP Network Server (LNS), which waits for new tunnels. Oct 22, 2024 · With so many VPN protocols available, it’s easy to get confused about how each one works. When the designation between L2TPv2 and L2TPv3 is necessary, L2TP as defined in RFC 2661 will be referred to as "L2TPv2", corresponding to the value in the Version field of an L2TP header. This means you can tunnel L2 protocols like Ethernet, Frame-relay, ATM, HDLC, PPP, etc. If IEEE 802. For VPN functionality, it uses IPsec, which provides encryption and confidentiality. As part of our ongoing commitment to provide the highest level of security and performance, we are deprecating the PPTP (Point-to-Point Tunneling Protocol) and L2TP (Layer 2 Tunneling Protocol) protocols from future Windows Server versions. , Every operating system's virtual private network (VPN) client fully supports L2TP/IPSec VPNs. Layer 2 protocol tunneling can be used independently or can enhance IEEE 802. Mar 3, 2025 · Layer 2 tunneling protocols (like VXLAN) create Layer 2 overlays, while Layer 3 tunneling protocols (like IPsec, GRE, MPLS) create Layer 3 overlays. Overview ¶ The kernel’s L2TP Oct 12, 2024 · Microsoft has officially deprecated the Point-to-Point Tunneling Protocol (PPTP) and Layer 2 Tunneling Protocol (L2TP) in future versions of Windows Server, recommending admins switch to different L2TP (Layer 2 Tunneling Protocol) is a computer networking term used to describe one of the main tunneling protocols that handle VPNs (virtual private networks). Virtual private networks (VPNs) and which standard have historically suffered from conflicts when used together? Hypertext Transfer Protocol (HTTP) Layer 2 Forwarding (L2F) Protocol Point-to-Point Tunneling Protocol (PPTP) Network address translation (NAT) Network address translation (NAT) What is SSH tunneling? The Secure Shell (SSH) protocol sets up encrypted connections between client and server, and can also be used to set up a secure tunnel. . It creates virtual tunnels for data, ensuring secure packet transmission across various networks. Aug 23, 2023 · Definition Layer 2 Tunneling Protocol (L2TP) is a protocol used to support virtual private networks (VPNs) or as part of the delivery of services by internet service providers. 6. Layer 2 Tunneling Protocol (L2TP) connections, which are also called virtual lines, provide cost-effective access for remote users by allowing a corporate network systems to manage the IP addresses assigned to its remote users. Advantages of L2TP (Layer 2 Tunneling Protocol) There are several advantages to L2TP: 1. 0 to 4. [STANDARDS-TRACK] Aug 23, 2024 · The Layer Two Tunneling Protocol (L2TP) is a protocol used by both Internet Service Providers (ISPs) and Virtual Private Networks (VPNs). LAC DF Bit The Layer 2 access concentrator (LAC) DF bit is configurable, but by default, it sends all L2TP packets with the DF bit set to 1. Mar 31, 2025 · This chapter describes how to configure the Layer 2 Protocol Tunneling on the Cisco Catalyst Switches. Layer 2 tunneling protocol (L2TP) is a VPN technology that connects two computers over a network connection. Apr 11, 2023 · Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used by internet service providers (ISPs) to enable VPN connections. This protocol only encrypts its control messages and is not responsible for encrypting or otherwise protecting other content by itself. A Layer Two Tunneling Protocol (L2TP) is an extension of PPTP protocol. 6. Dec 8, 2021 · Layer 2 Tunneling Protocol is an Internet Engineering Task Force (IETF) standard tunneling protocol that is used to encapsulate Point-to-Point Protocol (PPP) frames for transmission over TCP/IP, X. Oct 5, 2021 · What is Layer Two Tunneling Protocol (L2PT)? Layer Two Tunneling Protocol (L2TP) is an extension of the Point-to-Point Tunneling Protocol (PPTP) used by internet service providers (ISPs) to enable virtual private networks (VPNs). The following sections list prerequisites and considerations for configuring Layer 2 protocol tunneling. L2TP ¶ Layer 2 Tunneling Protocol (L2TP) allows L2 frames to be tunneled over an IP network. It creates a tunnel between two L2TP connection points, and along with another protocol like IPsec, helps in providing a secure way to connect to a network. Major tunneling protocols (ie: Layer 2 Tunneling Protocol (L2TP), Point to Point Tunneling Protocol (PPTP), and Layer 2 Forwarding (L2F)) encapsulate Layer 2 traffic from the remote user and send it across the public network to the far end of the tunnel where it is de-encapsulated and sent to its destination. The Layer 2 Tunneling Protocol encrypts only the messages that are a part of the protocol itself. Layer 2 Tunneling Protocol (L2TP) is a protocol for tunneling Layer 2 traffic over a Layer 3 network. Feature Aug 3, 2023 · The Layer 2 Tunneling Protocol (L2TP) is defined as a tunneling protocol that supports VPN and ISP service delivery. Layer 2 Tunnel Protocol (L2TP) Layer 2 Tunnel Protocol (L2TP) is a protocol that creates a tunnel to securely transfer data between two points in a public network. This document covers the kernel’s L2TP subsystem. Il s'agit d'un protocole réseau utilisé pour créer des réseaux privés virtuels (VPN), le plus souvent entre un opérateur de collecte de trafic (dégroupeur ADSL ou opérateur de téléphonie pour les accès RTC) et les fournisseurs d'accès à Internet. Further, L2TP connections provide secure access to your system or network when you use them in conjunction with IP Security (IPSec). 1Q tunneling is enabled, packets What is L2TP? Layer 2 Tunneling Protocol (L2TP) is a VPN protocol that creates a secure tunnel for transferring data between a device and a VPN server. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this Aug 16, 2025 · I. When protocol tunneling is enabled, Layer 2 protocols within each customer’s network are totally Layer 2 Turning Protocol acts as an extension to the Point-to-point tunneling protocol used by ISPs to enable the functioning a strong VPN. The second core IPSec security protocol; it can perform authentication to provide Jan 19, 2006 · Layer 2 tunneling protocols, such as L2TP, do not provide encryption mechanisms for the traffic it tunnels. In this post, we go through the origins of L2TP VPN, as well as its benefits and drawbacks, and whether it has a future competing alongside more modern Study with Quizlet and memorize flashcards containing terms like Layer 2 Tunneling Protocol (L2TP) has authentication and encryption. In a stack, packets received by a Layer 2 protocol-tunneled port are distributed to all ports in the stack that are configured for Layer 2 protocol tunneling and are in the same VLAN. Despite its age, it's still widely available – so much so that you've most likely either already used it, or at the very least seen it supported by your VPN gateway. Funnily enough, L2TP is often employed by ISPs to allow VPN operations. Today, I’ll answer the question, “What is L2TP VPN?” and explain why some of the best VPNs are still using this protocol. What is L2TP/IPsec? L2TP stands for Layer 2 Tunneling Protocol. What are some other tunneling protocols? Layer Two Tunneling Protocol "L2TP" Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Feb 25, 2016 · What Is L2TP? L2TP stands for Layer 2 Tunneling Protocol, and it’s – like the name implies – a tunneling protocol that was designed to support VPN connections. What is L2TP VPN Protocol? L2TP or Layer 2 Tunneling Protocol is an extension to the PPP protocol that merges the best features of two other tunneling protocols PPTP (Point-to-Point Tunneling Protocol) and L2F (Layer 2 Forwarding Protocol) and is used to support virtual private networks (VPNs). Sep 29, 2025 · Discover what L2TP (Layer 2 Tunneling Protocol) is and how it works, one of the ways to connect to remote networks with VPN securely. L2TPv3 defines the base control protocol and encapsulation for tunneling multiple Layer 2 connections between two IP nodes. L2TPv3 (Layer Two Tunneling Protocol Version 3) is a point-to-point layer two over IP tunnel. This article details the top five differences between PPTP and L2TP. L2TP (Layer 2 Tunneling Protocol) VPN L2TP (Layer 2 Tunneling Protocol) is a type of VPN that creates a secure connection by encapsulating data packets being sent between two computers. It works with any type of internet connection, including dial-up, DSL, cable modem, and wireless networks. 第二层隧道协议 （英語： Layer Two Tunneling Protocol，縮寫為L2TP）是一种 虚拟隧道协议，通常用于 虚拟专用网。L2TP协议自身不提供 加密 與可靠性驗證的功能，可以和 安全协议 搭配使用，从而实现数据的加密传输。经常与L2TP协议搭配的加密协议是 IPsec，当这两个协议搭配使用时，通常合称L2TP/IPsec Discover how the Layer 2 Tunneling Protocol (L2TP) works and why it's a popular choice for secure virtual private network (VPN) connections. Additional documents detail the specifics for each data link type being emulated. Learn how L2TP VPN works and where it falls short. While mainly implemented for security, L2TP doesn’t provide encryption on its own and needs to be paired with a secure network protocol. It combines the features of PPTP and Cisco's L2F protocols. 0 Back to Display Filter Reference Dec 15, 2023 · Layer 2 Tunneling Protocol, also known as L2TP, is a type of protocol used to support virtual private networks (VPNs). The standards body for Internet-related engineering specifications B) B. It creates a private connection between your device and a VPN server to move your traffic through a virtual tunnel. The two endpoints of an L2TP tunnel are the initiator of the tunnel, the L2TP access concentrator (LAC), and the L2TP network server (LNS), which waits for new tunnels. Layer 2 Tunneling Protocol (L2TP) signifie protocole de tunnellisation de niveau 2. An older protocol largely replaced by IPSec and SSL/ TLS-based VPNs in production environments, but still in use in some older environments C) C. Explore how L2TP is used in VPN setups, and how it works with IPSec to deliver security. over an IP network. Jan 26, 2022 · What is L2TP? L2TP – Layer 2 Tunneling Protocol – is a tunneling protocol used in creating VPN connections. The Layer 2 Tunneling Protocol (L2TP) creates stable tunnels between devices. 1Q tunneling ports, remote devices at the receiving end of the service-provider network do not receive the PDUs and cannot properly run STP, CDP, and VTP. With the Layer 2 Tunneling Protocol, protocols of the data link layer (Layer 2) of the ISO/OSI layer model can be tunneled over IP networks. Jul 11, 2025 · Internet Protocol Security Ip-in-IP SSH Point-to-Point Tunneling Protocol Secure Socket Tunneling Protocol Layer 2 Tunneling Protocol Virtual Extensible Local Area Network 1. On a single switch, ingress Layer 2 protocol-tunneled traffic is sent across all local ports in the same VLAN on which Layer 2 protocol tunneling is enabled. Once a tunnel is Oct 8, 2024 · As technology advances, so must our security protocols. L2TP is crucial in the telecom and network management industry for enabling secure and Layer 2 Tunneling Protocol version 3 is an IETF standard related to L2TP that can be used as an alternative protocol to Multiprotocol Label Switching (MPLS) for encapsulation of multiprotocol Layer 2 communications traffic over IP networks. , Cisco's VPN hardware that enables SSL VPNs requires special client software. Aug 30, 2019 · Layer 2 Protocol Tunneling OverviewWhen the Layer 2 PDUs that entered the service-provider inbound edge device through a Layer 2 protocol-enabled port exit through the trunk port into the service-provider network, the device overwrites the customer PDU-destination MAC address with a well-known Cisco proprietary multicast address (01-00-0c-cd-cd-d0). If protocol tunneling is not enabled on IEEE 802. May 23, 2023 · L2TP: The Layer 2 Tunneling Protocol (L2TP) is often combined with IPSec for encryption. It is a computer networking protocol that was designed to support VPN connections used by an Internet service provider (ISP) to enable VPN operation over the Internet. However, the main distinction lies in the purpose and scale of these overlays—whether they are used for network segmentation, virtualization, secure communications, or private connectivity. It is a popular choice for VPN’s, allowing remote users to securely connect to corporate networks. It achieves this by providing a direct tunnel for layer 2 traffic, encapsulating data Nov 2, 2007 · Layer 2 Tunnel Protocol L2TP Technology Description L2TP L2TP acts like a Data Link layer (Layer 2) protocol for tunneling network traffic between two peers over an existing network (usually the Internet). The DF bit can also be Jan 30, 2024 · The Layer 2 Forwarding, L2F Protocol, developed by Cisco Systems, marked a significant advancement of Virtual Private Networks (VPN). Definition and Purpose L2TP is a tunneling protocol that encapsulates data packets. L2TP extends the PPP model by allowing Layer 2 protocol and PPP protocol to communicate with each other, interconnected by a packet-switched Sep 15, 2025 · What Is L2TP? L2TP stands for Layer 2 Tunneling Protocol. Specifically, L2TPv3 defines the L2TP protocol for tunneling Layer 2 payloads over an IP core network by using Layer 2 VPNs. L2TP was first published in 1999. Aug 5, 2019 · The L2TP Layer 2 Tunneling Protocol is a part of Tunneling protocol in computer network which provides security, encryption, decryption, VPN etc between two different networks on internet. [1] Like L2TP, L2TPv3 provides a pseudo-wire service, but scaled to fit carrier requirements. It was developed jointly by Microsoft and Cisco in the late 1990s as a replacement for PPTP (Point-to-Point Tunneling Protocol), which was known to have security vulnerabilities. Nov 5, 2023 · Overall, Layer 2 Tunneling Protocol serves as a versatile tool for secure communication over networks, making it invaluable for businesses, remote workers, and service providers looking to protect their data and ensure reliable connections in various scenarios. You can use the Layer-2 Protocol Tunneling function to allow the client’s Layer-2 Control Protocol (L2CP) frames to be transparently transported (or to perform other actions such as dropping and/or forwarding traffic) across an EVC without interfering with the carrier/operator network and equipment. It is commonly employed to enable secure remote access to private networks over public networks like the Internet. L2TP provides a transparent communication between the two end-users and applications across the intervening network. It creates a tunnel between two L2TP connection points and allows the transmission of data with necessary authentication and encryption. Use this sample configuration to encrypt L2TP traffic using IPSec for users who dial in. 2. [STANDARDS-TRACK] Nov 9, 2025 · Layer 2 Tunneling Protocol is a VPN protocol that establishes a connection without encrypting traffic between your device and a VPN server. To configure Layer 2 point-to-point tunneling to facilitate the automatic creation of EtherChannels, you need to configure both the SP (service-provider) edge switch and the customer device. Layer 2 Tunneling Protocol Version 3 (L2TPv3) is an IETF l2tpext working group draft that provides several enhancements to L2TP to tunnel any Layer 2 payload over L2TP. 0. Feb 6, 2013 · The Layer 2 Tunneling Protocol (L2TP) is a standard protocol for tunneling L2 traffic over an IP network. When protocol tunneling is enabled, Layer 2 protocols within each customer’s network are totally Jun 17, 2024 · Learn how Layer 2 Tunneling Protocol enhances VPN services by enabling secure and efficient tunneling of data and its importance in modern networking. Jul 31, 2024 · This chapter describes how to configure the Layer 2 Protocol Tunneling on the Cisco Catalyst Switches. OVERVIEW Layer 2 Tunneling Protocol (L2TP) is a versatile tunneling protocol used to establish virtual private networks (VPNs). This document describes "version 3" of the Layer Two Tunneling Protocol (L2TPv3). eyoxfim hpax nmnh hugmqx oghjqud mbtt wyxm jrdx fqg gplhha qfddsic wvbciyty gynir zugc ptzb