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What is VXLAN with MP-BGP EVPN control plane?
Layer 2 infrastructure is extended over Layer 3 underlay network to provide a simplified service which is not dependent on physical and geographical location of servers in the datacenters. This document describes VXLAN with MP-BGP EVPN Control Plane. This means that BGP protocol is used in overlay infrastructure to send and receive updates.
What kind of route is used for EVPN?
The type-4 route is specific to VTEPs supporting the EVPN multi-homing model, for active-active and active-standby forwarding. The route is used to discover VTEPs which are attached to the same shared Ethernet Segment. Additionally, this route type is used in the Designated Forwarder (DF) election process.
How is VXLAN used in network virtualization?
VXLAN is designed to provide network virtualization. It is MAC in UDP encapsulation. Layer 2 infrastructure is extended over Layer 3 underlay network to provide a simplified service which is not dependent on physical and geographical location of servers in the datacenters.
How are VLANs associated to an EVPN instance?
An EVPN instance (EVI), can contain, one or more Layer 2 broadcast domains (VLANs). The association of a VLAN-IDs to a specific EVI instance and how a VLAN tag can be transported within the EVI if required, is defined by three EVPN service models: VLAN based, VLAN Bundle, and VLAN aware bundle.
When to use interface VLAN or overlay EVPN?
Interface vlan is used to create a virtual interface based on a VLAN. We use this to create the anycast gateway IP for the VNI, and to tie VNI’s to a tenant’s VRF. Don’t worry, it’ll make more sense soon. Overlay evpn adds the EVPN address family.
Which is the NVE interface for BGP control plane learning?
The NVE interface is the VTEP. There is only one of these per switch. It uses the loopback interface to get its IP address. We set BGP as the host-reachability protocol, which enables BGP control plane learning. If this isn’t enabled, then we’re using flood and learn. The BGP instance is configured mostly as normal.