Solve network and security management challenges with a Secure Access Service Edge architecture. Explore options to quickly connect you with the networking solution you need. VXLAN is an encapsulation protocol that provides data center connectivity using tunneling to stretch Layer 2 connections over an underlying Layer 3 network.
In data centers, VXLAN is the most commonly used protocol to create overlay networks that sit on top of the physical network, enabling the use of virtual networks. The VXLAN protocol supports the virtualization of the data center network while addressing the needs of multi-tenant data centers by providing the necessary segmentation on a large scale.
Data centers have rapidly increased their server virtualization over the past decade, resulting in dramatic increases in agility and flexibility. Virtualization of the network and decoupling the virtual network from the physical network makes it easier to manage, automate, and orchestrate. VTEPs can also reside in hypervisor hosts, such as kernel-based virtual machine KVM hosts, to directly support virtualized workloads.
Get updates from Juniper. Help us improve your experience. Let us know what you think. Do you have time for a two-minute survey? Maybe Later. LOG IN. My Account. Therefore, none of these fields provide a sufficient way for ECMP to differentiate flows. When a QFX switch attempts to tunnel traffic on core-facing Layer 3 tagged interfaces or IRB interfaces, the switch drops the packets. To avoid this issue, you can configure a simple two-term filter-based firewall on the Layer 3 tagged or IRB interface.
For term 1, note that when specifying an action, you can alternatively count traffic instead of accepting it. As a result, you must include the set firewall family inet filter vxlan term 2 then routing-instance route1 command. Without this command, the firewall filter will not work properly. You use these options to force the ping or traceroute packets to follow the same path as data packets through the VXLAN tunnel.
In other words, you make the underlay packets ping and traceroute take the same route as the overlay packets data traffic. See ping overlay and traceroute overlay for more information. Help us improve your experience. If a user's personally identifiable information changes such as your postal address or email address , we provide a way to correct or update that user's personal data provided to us.
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In this article, we'll provide an overview of VXLAN and you'll learn what it is, how it works, and where to use it. It was initially designed to address the issues related to scalability in large-scale network deployments such as ISPs or cloud providers. As the name implies, VxLAN virtually extends a layer 2 segment across the layer 3 network infrastructure. It is a fact that one of the significant benefits of VxLAN is scalability.
But when you can span layer 2 networks across IP network infrastructure, there are also many more benefits. VxLAN is an overlay encapsulation technology. It creates a virtual network overlaid on top of the existing physical network infrastructure. The overlay and the underlay networks are totally independent, so if there is a change in the underlay network topology, the overlay network will not be affected design-wise.
The overlay network can be re-designed without needing to add, remove, or update network devices. Of course, physical problems that affect performance or uptime of the underlay will be reflected on the overlay. For example, if there are not enough devices to provide enough bandwidth, the overlay will also be affected. The best way to guarantee performance, scalability, reliability, and flexibility on a VxLAN overlay while allowing the underlay to change, is to make good use of a switching fabric topology.
The best example of a switching fabric topology is the Spine-and-Leaf, which is commonly used as an underlay network. Spine-and-leaf is an independent architecture. It is not exclusive to VxLAN, but it is often associated with it. All the leaf switches have a link to every spine switch. The spine-and-leaf fabric topology is highly relevant to VxLAN because, as the overlay network scales, the supporting underlay can physically grow or decrease the size without affecting the design of the overlay.
Adding VxLAN on top of the spine-and-leaf underlay allows IP mobility of east-west traffic patterns, full scalability, and fault tolerance. We know so far that VxLAN stretches the layer 2 subnets across the layer 3 network limits.
It builds a logical overlay network on top of a switching fabric like the Spine-and-Leaf.
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