Layer 3 VPN is less transparent compared to Layer 2 VPN and can meddle with applications. Customers make connectivity of remote customer sites with the Layer 3 (IP) connectivity and not the service provider. Layer 3 (IP) connectivity of the customer is made with the edge devices of the provider sites.

With MPLS, Layer 2 and Layer 3 VPN can be provided and main difference between MPLS Layer 2 and Layer 3 VPN from the deployment point of view is, in MPLS Layer 3 VPN, customer has a routing neighborship with the Service Provider. In MPLS Layer 2 VPN, Service Provider doesn’t setup a routing neighborship with the customer. Once a given packet is labeled the intervening devices simply forward it based on whatever LSP has been signaled. In the case of an L3VPN, the packet is a fully formed IP packet. In the case of an L2VPN a frame from a particular interface has a label added and is forwarded. Provisioning and management using a single VPN technology rather than both Layer 2 and Layer 3 is simpler. Greater Control MAC/IP provisioning from a network management system database enables programmatic network control. Control plane signaling maintains a consistent signaled forwarding database instead of flooding and learning in the data plane. Solved: Hi, I've got a choice of getting a new WAN connection but I don't fully understand the reasons for choosing a layer2 wan over a layer3 wan, can someone please explain the advantages/disadvantages of each and when to use either? Carrier Ethernet Services and Layer 3 VPNs. Many core networks are built over IP/MPLS both nationally and internationally. IP/MPLS or L3VPN is a technology where the traffic is carried over pseudowires (PW) over MPLS Label Switch Paths (LSPs) tunnels. The forwarding is L3-based. The infrastructure comprises routers that are MPLS-capable.

The differences between Layer 2 VPN and Layer 3 VPN are as follows -

If IPSec is used as site-to-site VPN, I Personally think IPSec is working / linking two sites in layer 3. Case 2: IPSec over MPLS. To my understanding MPLS is an routing protocol and IPSec would working in layer 3 for the encryption. Case 3: As I know there is L2TP+IPSec VPN, which L2TP work as an layer 2 tunneling protocol. M Series,EX Series,T Series,PTX Series,MX Series. On EX9200 switches, graceful Routing Engine switchover (GRES), nonstop active routing (NSR), and logical systems are not supported on Layer 2 VPN configurations. Layer 2 VPN is not supported on the EX9200 Virtual Chassis. close. On EX8200 and EX4500 switches, you can use MPLS-based Layer 2 and Layer 3 virtual private networks (VPNs) or MPLS Layer 2 circuits, allowing you to securely connect geographically diverse sites across an MPLS network.

M Series,EX Series,T Series,PTX Series,MX Series. On EX9200 switches, graceful Routing Engine switchover (GRES), nonstop active routing (NSR), and logical systems are not supported on Layer 2 VPN configurations. Layer 2 VPN is not supported on the EX9200 Virtual Chassis.

Jun 02, 2020 · In the case of security, Layer 2 VPN is less secured compared to Layer 3 VPN. Layer 2 VPN is more straightforward whereas, Layer 3 VPN is a bit harder. Layer 2 VPN is transparent to applications whereas Layer 3 VPN is less transparent. Thre are many other concepts we can introduce to define the difference between Layer 2 and Layer 3 VPN.