Ssl vpn secure sockets layer virtual private network. Service providers wish to offer new ethernet services such as lan transparent services, to effectively deploy the. Pdf layer 2 vpn architectures and operation researchgate. Data link layer vpns network layer vpns application layer vpns data link layer vpns with data link layer vpns, two private networks are connected on layer. Download for offline reading, highlight, bookmark or take notes while you read layer 2 vpn architectures. When ssl vpn clients negotiate a connection, they connect using tls. The entire communication from the core vpn infrastructure is forwarded using layer 3 virtual routing and forwarding techniques.
Taxonomy, technology, and standardization efforts paul knight, nortel networks chris lewis, cisco systems abstract virtual private network services are often classified by the os1 layer at which the vpn ser vice providers systems interchange vpn reacha bility information with customer sites. You use the cartridge deployer tool to simultaneously deploy multiple cartridges to uim runtime environments. A layer 2 mpls vpn allows you to provide layer 2 vpn service over an existing ip and mpls backbone. Users are plagued by malware companies and government agencies are high value targets critical data gets stolen. Layer 2 vpn technology pack super jar archive file.
For any person involved with designing or maintaining l2 vpns layer 2 vpn architectures is a must. A complete guide to understanding, designing, and deploying layer 2 vpn technologies and. Configure a sitetosite vpn as a failover path for expressroute. The layer 2 vpn technology pack super jar archive file contains the entire contents of the technology pack and is ready for deployment using the cartridge deployer tool. Understanding layer 2 vpns techlibrary juniper networks. Layer 2 vpns are a type of virtual private network vpn that uses mpls labels to transport data. L2vpn provides an endtoend layer 2 connection to an enterprise office in mumbai. Pdf layer 2 vpn architectures and operation alvaro paricio.
Ipsec vpn technology is used for both end user and sitetosite connectivity. Layer 2 vpn l2vpn over metro or wide area network is a service where a customer connects several locations with layer 2 connectivity, that is, without ip routing. Implementing mpls layer 2 vpns this module provides the conceptual and configuration information for mpls layer 2 virtual private networks vpns on cisco ios xr software. Layer 2 virtual private networks vpns offer an alternative to implementing layer 2 solutions. Chapter 3, layer 2 vpn architectures, outlines the benefits and implications of using each technology and highlights some important factors that help network planners and operators determine the appropriate technology. The technology pack also enables you to model dualhomed sites. I think that this stuff is data access, because the business layer need data. This is a timely release for us, since were converting our network to. In the first part of this article series we talked about service terms and some steps about service creation and the preparing the network for service creation. Implementing mpls with label switching in softwaredefined networks draft of april 30, 2015 at 15. Comparative analysis of mpls layer 2 vpn techniques ijcst. Jan 19, 2017 layer 2 vpn is a type of vpn mode that is built and delivered on osi layer 2 networking technologies.
The key concept of the method of realizing vpn by softether vpn is the full virtualization of ethernet segments, layer2 ethernet switches and ethernet adapters. Within the discussion of content networking, we will. As you consider different virtual private network types for your enterprise wan, such as mpls, ipsec, ssl and remote, be mindful of the traffic you want to transmit data, voice, etc. Vpn encryption provides digital privacy and stops your isp tracking your web browsing habits. Pdf users need high speed and low latency transmission for new applications. Legacy l2 interconnect options as we briefly touched on in the introduction section, the first ethernet l2 segment support architectures over wide area links were built around lan emulation. So with that in mind, would using a standard layer 3 vpn, such as ipsec, require me. A separate ordering guide has been developed to address information to establish a vpn. Tu dresden security architectures motivation 2 common observations. In a typical access vpn connection, a remote user or vpn client initiates a ppp connection with the isps nas via the public switched telephone network pstn. Service providers provision layer 2 vpn services over an ip network that typically uses.
Service providers provision layer 2 vpn services over an ip network that typically uses multiprotocol label switching mpls to rapidly switch data packets supported by various layer 2 technologies, including ethernet, over the network. Integrated cisco and unix network architectures cisco press. Network preparation for layer 2 vpn and layer 3 vpn. Based on the osi model layers, vpns can be divided into the following three main categories. Integrated cisco and unix network architectures reveals not just the feasibility but also the desirability of ciscounix integrated routing with regard to systems integration, interoperability, and feature requirements.
Detailed, progressively complex lab scenarios emphasize enterprise and isp requirements, casting light on the similarities and. In a layer 2 vpn, l2 frames usually ethernet are transported between locations. Ssl vpn technology is used exclusively for user connectivity where it provides an ideal solution for creating a vpn tunnel through restricted networks back to the home site. Layer 2 vpn architectures cisco ios xr fundamentals part 5 chapter 15 chapter 9 pages 340 to 347 nb. They come in all sizes, from inexpensive units for homes and small. Both documents assume the reader has basic familiarity with ddoe and has an established account with roles. Disa direct order entry ddoe for private ip service layer 3 vpn, private lan service layer 2 vpn, and label transport service layer 2 csc vpn. Layer 2 vpn is not supported on the ex9200 virtual chassis. If you want to implement true convergence onto a single core infrastructure, your core network should support the transport of public ip and private ip vpn, as well as a number of legacy layer 2 wan and lan technologies for example, with any transport over mpls atom. This book does not discuss the various layer 2 and layer 3 overlay vpn technologies in detail because they are covered well in other cisco press publications and are beyond the scope of this book. Vpls uses layer 2 architecture to offer multipoint.
Since ethernet is the dominant lan technology, service providers wish to offer new ethernet services as layer 2 virtual private network l2vpn, to meet the requirements of. At the lower stack level, a layer 2 vpn l2vpn can be used to connect together vlans, which could work well for communicating sensitive information between national offices. You can configure the pe router to run any layer 3 protocol in addition to the layer 2 protocols. Introduction to configuring layer 2 vpns techlibrary. Ssl tls6 ssl tls is a transportlayer protocol that use tcp port 443. Layer 2 vpn architectures by wei luo, carlos pignataro. Layer 2 mpls vpns often called martini vpns after the primary author of the ietf draft allow service providers to deliver to their customers secure, layer 2 connections over mpls core networks. Both ssl and ipsec are l3 solutions, you can share same subnet as a lan interface but you might have problem with broadcasts depending on. Layer 2 vpn concepts this chapter provides an overview of prime fulfillment layer 2 vpn concepts. As with layer 2 network solutions in general, layer 2 vpn tools tend to be.
Pdf layer 2 vpn architectures and operation alvaro. Layer 2 vpn architectures, by wei luo, carlos pignataro, anthony yh chan and dmitry bokotey cisco press, 2005. In addition to describing the concepts related to layer 2 vpns, this book provides an extensive collection of case studies that show you how these technologies and architectures work. The book opens by discussing layer 2 vpn applications utilizing both atom and l2tpv3 protocols and comparing layer 3 versus layer 2 providerprovisioned vpns. While i must admit that i use most of my books as reference, this book is an easy read for those persons who are trying to learn the various l2 vpns options available. Layer 2 solution a virtual private network vpn allows the provisioning of private network services for an organization or organizations over a public or shared infrastructure such as the internet or service provider backbone network.
To associate a pseudowire label with a particular layer 2 connection, you need a way to represent such a layer 2 connection. The configuration and deployment of l2 vpn technology is a. In addition, the technology pack supports modeling of vpls deployed using hierarchical and hubandspoke architectures. Cisco is providing both layer 2 and layer 3 tunneling solutions.
Layer 2 wan transport ethernet has traditionally been a lan technology primarily due to the distance limitations of the available media and the requirement for dedicated copper or fiber links. Evpncontemporary layer 2 interconnect white paper 2015, juniper networks, inc. In addition to describing the concepts related to layer 2 vpns. For azure and office 365 services, the internet is the only failover path. In the more general case, its similar to a cable connecting two switches in separate buildings. Offer layer 2 vpn architectures it certification forum. A virtual private network vpn is used for creating a private scope of computer communications or providing a secure extension of a private network through an insecure network such as the internet. By unifying multiple network layers and providing an integrated set of software services and management tools over this infrastructure, the cisco layer 2 vpn solution enables established carriers, iporiented ispclecs, and large enterprise customers lecs to reach a broader set of potential vpn customers and offer truly global vpns. Layer 2 vpn architectures ebook written by wei luo, carlos pignataro, anthony chan, dmitry bokotey.
This guide serves as an introduction to layer 3 vpn architectures. Android and ios for example simply cannot do layer 2 at all, because their vpn api doesnt have the means to do it. Extend an onpremises network using expressroute azure. We take a theoretical walk through the different l2 vpn technologies out there. Cisco ios multiprotocol label switching mpls layer 2 vpns consolidate layer 2 traffic such as ethernet, frame relay, asynchronous transfer mode atm, high level data link control hdlc, and pointtopoint protocol ppp over an ipmpls network. Layer 2 terminology conventions, page 11 l2vpn service provisioning, page 15 flexunievc ethernet service provisioning, page 110 vpls service provisioning, page 116 layer 2 terminology conventions. A layer 2 mpls vpn is a term in computer networking. Here, in this article, we will talk about the practical configuration of. Layer 2 tunneling is primarily an access vpn solution while layer 3 tunneling provides support for intranet and extranet vpns between branch offices and a corporate headquarters.
Virtual private file system vpfs tu dresden security architectures design space 36 protection disk driver block layer. Based on ietf drafts that promote open architecture and vendor interoperability. Mpls layer 2 vpns functional and performance testing. Customers who prefer to maintain control over most of the administration of their own networks might want layer 2 vpn. Hidden content youll be able to see the hidden content once you press the thanks button.
It is a method that internet service providers use to segregate their network for their customers, to allow them to transmit data over an ip network. For the functionality of mpls vpns over ip tunnels, see implementing mpls vpns over ip tunnels in cisco ios xr virtual private network configuration guide. Since ethernet is the dominant lan technology, service providers wish to offer new ethernet services as layer 2 virtual private network l2vpn, to meet the requirements of these applications. Commonly known scheme for building layer 2 circuits over mpls. Red text indicates that this section of text is already covered in another topic 1. The label distribution procedures that are defined in ldp specifications distribute and manage the pseudowire labels. There are different layer 2 vpn techniques like virtual private lan services vpls. Layer 2 vpn architectures networking technology 1, wei luo. The goal of this paper is to answer those questions and provide proof with test results that an mpls based vpn solution is as secure as a comparable layer 2 vpn. Mpls layer 2 vpns functional and performance testing sample test plans. Layer 2 is still present in access server but it is hidden. On ex9200 switches, graceful routing engine switchover gres, nonstop active routing nsr, and logical systems are not supported on layer 2 vpn configurations. Vpn architectures david morgan vpn characteristics network member workstations in touch by ip address virtual physically not a network geographically dispersed no common hubwire piggybacks somebody elses wire eg, internet private but traffic on that wire cant be tapped. Layer 2 wan transports are now widely available from service providers and are able to extend various layer 2.
Tu dresden security architectures loader split file system 35 microkernel names gui user auth secure storage io support legacy os untrusted storage proxy signing app idea. Ssl protocol is defined by the ietf and there are no versions of ssl beyond version 3. Site to site vpn layer 2 bridge multiple remote sites all on same subnet. One might argue that the case where the customer and the provider use the same layer 2 technology for example, frame relay or atm switches also constitutes a peertopeer model, but because we focus on layer 3 vpn services here, we will not consider this scenario. The entire communication from the core vpn infrastructure is forwarded in a layer 2 format on a layer 3ip network and is converted back to layer 2 mode at the receiving end. May 12, 2005 the cisco solution also includes alternative pseudowire emulation using layer 2 tunnel protocol version 3 l2tpv3. Layer 2 vpn architectures is a comprehensive guide to consolidating network infrastructures and extending vpn services. Chapter 1 layer 2 vpn concepts layer 2 terminology conventions mapping mef terminologies to network technologies the mef terminology only describes the outside characteristics of a service, that is, what the service looks like from the perspective of a customer looking in towards the usertonetworkinterface uni device. Layer 2 vpn architectures ebook pdf isps know everything you do online layer 2 vpn architectures ebook pdf by default,and can report this to the government if they are asked mandatory data retention. I have a file and i have to extract specific information into an object. See layer 2 vpn technology pack individual jar files for more information.
The baseline ldp specification only defines layer 3. Virtual private network architectures comparing multiprotocol label switching, ipsec, and a combined approach introduction in the present economy, service provider pro. Using layer 2 is really frowned upon, but its still available on some platforms that can support it if it is really necessary. Tu dresden security architectures file encryption 39 files in. In effect, both atm lan emulation lane and mpls vpls are quite. A basic understanding of mpls and mpls vpn principles is. Site to site vpn layer 2 bridge multiple remote sites all. Layer 3 vpn is also known as virtual private routed network vprn. For more about this option, see connect an onpremises network to azure using expressroute with vpn failover.
In order to establish good vpn network, softether vpn virtualizes ethernet, which is widely used all over the world. Network services defense information systems agency. Layer 2 vpn architectures networking technology free. Mar 10, 2004 layer 2 vpn architectures ebook written by wei luo, carlos pignataro, anthony chan, dmitry bokotey.
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