How does VXLAN work on Linux?
A VXLAN device can learn the IP address of the other endpoint either dynamically in a manner similar to a learning bridge, or make use of statically-configured forwarding entries. The management of vxlan is done in a manner similar to its two closest neighbors GRE and VLAN.
Who uses VXLAN?
Other backers of the VXLAN technology include Huawei, Broadcom, Citrix, Pica8, Big Switch Networks, Cumulus Networks, Dell EMC, Ericsson, Mellanox, FreeBSD, OpenBSD, Red Hat, Joyent, and Juniper Networks. VXLAN is officially documented by the IETF in RFC 7348.
What is VXLAN and GRE?
Both NVGRE (network virtualization using generic routing encapsulation）and VXLAN (virtual extensible LAN) are networking virtualization technologies, which aim to extend VLAN to solve problems of scanty virtual networking in large cloud computing deployments.
What is VXLAN and Vtep?
The entity that performs the encapsulation and decapsulation of packets is called a VXLAN tunnel endpoint (VTEP). To support devices that can’t act as a VTEP on their own, like bare-metal servers, a Juniper Networks device can encapsulate and de-encapsulate data packets. This type of VTEP is known as a hardware VTEP.
Can VXLAN replace MPLS?
Both MPLS and VXLAN require specific hardware support to operate at line rate but VXLAN only requires hardware support for encapsulation at the edge of the network and thus network cores do not necessarily need replacing. MPLS demands end to end support.
Is VXLAN a Layer 3?
VXLAN encapsulates a Layer 2 Ethernet frame into a UDP packet and transmits the packet over a Layer 3 network. As shown in Figure 1-1, VXLAN is essentially a tunneling technology.
Why VXLAN uses UDP?
VXLAN encodes flow information in the UDP source port thus allowing routers to do flow load balancing. Note that there are other tunneling protocols such as NVGRE that don’t use UDP but go directly on top of IP.
Does EVPN require MPLS?
MPLS is a data-plane protocol, while EVPN is a control-plane protocol. As such, EVPN will not replace MPLS. In fact, EVPN can leverage MPLS to send packets across the network. With this being said, people often refer to Layer 3 MPLS VPN service as simple ‘MPLS’.
What is the difference between VXLAN and EVPN?
EVPN-VXLAN provides the scale required by cloud service providers and is often the preferred technology for data center interconnections. EVPN, as an overlay, supports multi-tenancy and is highly extensible, often using resources from different data centers to deliver a single service.
Does EVPN require BGP?
EVPN is an extension to Border Gateway Protocol (BGP) that allows the network to carry endpoint reachability information such as Layer 2 MAC addresses and Layer 3 IP addresses. This control plane technology uses MP-BGP for MAC and IP address endpoint distribution, where MAC addresses are treated as routes.
Can we use VXLAN without EVPN?
Traditional bridging, VXLAN (without EVPN), SPB, or TRILL use dynamic MAC learning, so there’s no control-plane difference between them. EVPN uses BGP to propagate MAC addresses, but only across the network.
Is EVPN and VXLAN same?
VXLAN (Virtual Extensible Local Area Network) is a Layer 2 overlay technology over a Layer 3 underlay infrastructure. And EVPN (Ethernet VPN) is an overlay control plane technology for VXLAN and provides virtual connectivity between different Layer 2/3 domains over an IP or MPLS network.