I would like references to specific aspects of MPLS VPN design in the context of Layer 2. (i). How are LSPs established. (ii). How is the concept of multiple VPNs incorporated in case of Layer 2. (i.e. analog of VRF). – Hashken Jun 5 '12 at 6:49
A new Layer 2 MPLS VPN technology that provides similar reliablity and QoS as MPLS VPN, but in a more simplified way. But beware, it does have it's limitations. Figure 4-30. Layer 2 Security at an IXP. If the hacker is connected to the same VLAN as the ASBRs, security of all Inter-AS VPNs is jeopardized. The hacker could, for example, insert on Layer 2 spoofed labeled packets, which appear to come from one ASBR and go to the other. This way, the hacker could insert traffic into any Inter-AS VPN. E-VPN uses the existing MPLS/IP backbone to transport the layer 2 connectivity among the various data centers which are part of same VPN. Being layer-2 extension, the solution treats the mac addresses as routable addresses and uses the existing MP-iBGP protocol to carry the customer mac addresses. I would like references to specific aspects of MPLS VPN design in the context of Layer 2. (i). How are LSPs established. (ii). How is the concept of multiple VPNs incorporated in case of Layer 2. (i.e. analog of VRF). – Hashken Jun 5 '12 at 6:49 Layer 2 VPN (L2VPN) usually use MPLS-based (Multi-Protocol Label Switching) labels for sending data to network edge routers from the transmission site to the destined node. Layer 3 VPN (L3VPN) usually uses a peer-to-peer model, which uses Border Gateway Protocol (BGP) model, which is based on an IETF Request for Comments (RFC) 2547 for sending L2VPNs—Use Layer 2 transport as a building block to build a Layer 2 VPN service that includes autoconfiguration, management, QoS, and so on. A concept of pseudowires to emulate a Layer 2 service is a key attribute for a Layer 2 VPN over MPLS.
This chapter covers the following topics: Label Distribution Protocol (LDP) AToM operations. To provide Layer 2 VPN services over an IP/Multiprotocol Label Switching (MPLS) net-work infrastructure, the Internet Engineering Task Force (IETF) developed a series of solution and protocol specifications for various Layer 2 VPN applications, including pseudowire emulation.
Layer 2 VPN emulates the behavior of a local area network (LAN) across an internet protocol (IP) or MPLS-enabled IP network allowing Ethernet devices to communicate with each other as if they were connected to a common LAN segment. EX Series. MPLS-Based Layer 2 VPNs, Layer 2 Circuits, MPLS-Based Layer 3 VPNs, Comparing an MPLS-Based Layer 2 VPN and an MPLS-Based Layer 3 VPN Apr 12, 2017 · Layer 2 VPNs are a type of Virtual Private Network (VPN) that uses MPLS labels to transport data. The communication occurs between routers that are known as Provider Edge routers (PEs), as they sit on the edge of the provider's network, next to the customer's network. At the moment, the debate between Layer 2 VPN services based on MPLS and Layer 3 MPLS VPNs is largely theoretical; Layer 2 VPN service are not widely available yet.. But the two are different
Layer 2 VPN (L2VPN) usually use MPLS-based (Multi-Protocol Label Switching) labels for sending data to network edge routers from the transmission site to the destined node. Layer 3 VPN (L3VPN) usually uses a peer-to-peer model, which uses Border Gateway Protocol (BGP) model, which is based on an IETF Request for Comments (RFC) 2547 for sending
The year 2000 not only marked the beginning of a new century, but also the concept of network-based virtual private networks (VPNs) that use MultiProtocol Label Switching (MPLS) as a new Layer 3 form of data communications. This offered the same level of security as Layer 2 but with additional flexibility to support any-to-any connections. MPLS Layer two VPN Making use of Enhanced 802.1Q Tunneling. 802.1Q tunneling allows support organizations to supply a Layer two VPN service, often referred to as Layer 2 transparent LAN products and services (TLS) or Ethernet LAN products and services, using a VLAN-in-VLAN hierarchy and marking the labeled packets. is layer 2 data such as frame relay, Ethernet, ATM data etc or layer 3 data such as IPV4, IPV6. MPLS creates two type of VPNs. One is Layer 3 MPLS VPN and other one is Layer 2 MPLS VPN. In Layer 3 MPLS VPN, customer forms IP neighbor ship with Service Provider device. In Layer 3 VPN routing is performed between customer edge device and Provider Layer 2 VPN Architectures is a comprehensive guide to consolidating network infrastructures and extending VPN services. The book opens by discussing Layer 2 VPN applications utilizing both AToM and L2TPv3 protocols and comparing Layer 3 versus Layer 2 provider-provisioned VPNs.