What Is OTV?
May 16, 2023Are you curious to know what is OTV? You have come to the right place as I am going to tell you everything about OTV in a very simple explanation. Without further discussion let’s begin to know what is OTV?
What Is OTV?
OTV, or Overlay Transport Virtualization, is a technology used in data center networking to extend Layer 2 network connectivity across geographically dispersed data centers. It enables the creation of a single logical network across multiple data centers, allowing for seamless workload mobility and disaster recovery capabilities. In this blog post, we’ll explore more about what OTV is and how it works.
How OTV Works?
OTV works by encapsulating Layer 2 Ethernet frames in IP packets, which are then routed over a Layer 3 IP network. This enables the extension of Layer 2 network connectivity between data centers without the need for a dedicated Layer 2 network link. The OTV encapsulation and de-encapsulation process is performed by devices called OTV edge devices, which are typically switches or routers.
In an OTV deployment, each data center has at least one OTV edge device that connects to the Layer 2 network within the data center and to the Layer 3 IP network that connects the data centers. The OTV edge devices exchange MAC address reachability information with each other, allowing them to forward Ethernet frames between the data centers as if they were on the same network.
Benefits Of OTV
OTV offers several benefits for data center networking, including:
- Workload mobility: With OTV, workloads can be moved between data centers without the need for IP address changes or reconfiguration of network connectivity.
- Disaster recovery: OTV enables disaster recovery capabilities by allowing virtual machines to be migrated to a different data center in the event of a disaster.
- Simplified network architecture: OTV simplifies network architecture by eliminating the need for dedicated Layer 2 network links between data centers.
- Increased flexibility: OTV provides increased flexibility for data center deployments, allowing for more efficient use of resources and greater scalability.
Conclusion
In conclusion, OTV is a technology used in data center networking to extend Layer 2 network connectivity across geographically dispersed data centers. OTV works by encapsulating Layer 2 Ethernet frames in IP packets and routing them over a Layer 3 IP network. OTV offers several benefits, including workload mobility, disaster recovery capabilities, simplified network architecture, and increased flexibility. To implement OTV, OTV edge devices must be deployed at each data center and configured to exchange MAC address reachability information with each other.
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FAQ
What Is OTV Used For?
Overlay transportation introduces the concept of “MAC routing,” which means a control plane protocol is used to exchange MAC reachability information between network devices providing LAN extension functionality.
What Does OTV Stand For In Networking?
What is OTV? OTV stands for Overlay Transport Virtualization. This technology allows us to extend a layer 2 ethernet domain across any layer 3 transport network. Examples of layer 3 transport networks could be your MPLS WAN or even the internet.
What Is The Difference Between OTV And Vxlan?
Well VXLAN is extending the VLANs or layer 2 traffic within the datacenter while OTV is the extension of the layer 2 Traffic across the datacenter. VXLAN comes into mind when there is east-west traffic fundamentals comes into the picture.
What Is The Difference Between OTV And Lisp?
OTV Is Resilience; LISP is Redundancy
Therefore, a system can move anywhere in an Ethernet VLAN, its IP address is unchanged, and, thus, it can maintain connections to the clients.
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