• Category : EVPN

 
 

EVPN VXLAN Design Guide

EVPN VXLAN Design Guide   A Detailed Overview of the EVPN & VxLAN Protocols, Route Types, Use-Cases and Architectures   1. Introduction This document describes the operation and configuration of BGP EVPN Services over a VXLAN (Virtual eXtensible LAN) overlay on Arista platforms. The focus in this design guide is VxLAN as the protocol for the data-plane encapsulation for the overlay tunnels, and the functionality of the Multiprotocol BGP (MP-BGP) EVPN address-family for control plane signaling in the overlay.  MP-BGP EVPN is not only used for advertising MAC addresses, MAC and IP bindings and IP prefixes across the overlay; it...
Continue reading →

Arista Layer 2 VTEP EVPN VxLAN Route Type-1 Support

Arista Layer 2 VTEP EVPN Route Type-1 Support   Arista Layer 2 EVPN VTEP Inter-Operation With A/A Multi-homed Third-Party Layer 3 EVPN VXLAN VTEPs   Introduction   This document will explain the configurations required to support inter-working with EVPN VXLAN A/A multi-homed VTEPs, also known as L2 ECMP in VxLAN EVPN.   Currently, EOS uses MLAG is used to achieve Multi-homing in EVPN VxLAN Topologies, with an any-cast VxLAN VTEP configured on the MLAG pair, and as such does not need to support EVPN Multihoming Tx (Type-1 route generation). EOS can however install received Type-1 routes and can...
Continue reading →

Multi-Tenant EVPN VXLAN IRB Configuration & Verification Guide (iBGP Overlay eBGP Underlay)

Multi-Tenant EVPN VXLAN IRB Configuration & Verification Guide   Symmetric and Asymmetric IRB With VLAN Based and VLAN Aware Bundle Services Using an iBGP Overlay and eBGP Underlay Topology Logical Diagrams Tenant-A: Symmetric IRB Tenant-B: Asymmetric IRB Platform Support: https://www.arista.com/en/support/product-documentation/supported-features Topology Overview   In the symmetric and asymmetric IRB setups illustrated in the figures above;  for tenant-a four subnets are stretched across the two MLAG domains; with two subnets (vlan 10 – 10.10.10.0/24 and vlan 11 – 10.10.11.0/24) configured as a VLAN based service, and two other subnets (vlan 12 – 10.10.12.0/24 and vlan 13 – 10.10.13.0/24) as a vlan-aware...
Continue reading →

Multi-Tenant EVPN VXLAN IRB Configuration & Verification Guide (eBGP Overlay & Underlay)

Multi-Tenant EVPN VXLAN IRB Configuration & Verification Guide   Symmetric and Asymmetric IRB With VLAN Based and VLAN Aware Bundle Services Using an eBGP Overlay and eBGP Underlay Topology Logical Diagrams Tenant-A: Symmetric IRB Tenant-B: Asymmetric IRB Platform Support: https://www.arista.com/en/support/product-documentation/supported-features Topology Overview   In the symmetric and asymmetric IRB setups illustrated in the figures above;  for tenant-a four subnets are stretched across the two MLAG domains; with two subnets (vlan 10 – 10.10.10.0/24 and vlan 11 – 10.10.11.0/24) configured as a VLAN based service, and two other subnets (vlan 12 – 10.10.12.0/24 and vlan 13 – 10.10.13.0/24) as a vlan-aware...
Continue reading →

L3 EVPN VXLAN Configuration Guide

L3 EVPN VXLAN Configuration Guide   EVPN VXLAN Type-5 Layer 3 VPN  (With Dual-Homed Layer 2 and Layer 3 Sites) Overview Ethernet VPN (EVPN) is an extension of the BGP protocol introducing a new address family: L2VPN (address family number 25) / EVPN (subsequent address family number 70). It is used to exchange overlay MAC and IP address reachability information between BGP peers using type-2 routes, but additionally,  EVPN supports the exchange of layer 3 IPv4 and IPv6 overlay routes through the extensions described in (type 5 EVPN routes). An IP VRF is used on a VTEP router for...
Continue reading →

Summary of Arista VxLAN Control Plane Options

IP Multicast Head End Replication (HER) with static flood-set CloudVision eXchange (CVX) Ethernet VPN (EVPN) – VTEPs within a VNI join a configured control plane multicast group.– BUM traffic is sent to all VTEPs within the VNI over the configured multicast-group.– Arista supports only multicast decapsulation to interop with third-party VTEP(s). HER will be used for BUM traffic encapsulation.  – Underlay needs to be multicast capable which can possibly make the deployment limited.– Recommended for deployments where Arista VTEPs need to interop with legacy third-party VTEPs that support only multicast underlay for BUM traffic handling. – BUM traffic within a...
Continue reading →

Automating L3 EVPN instances deployment using CloudVision Portal

The intention of this article is to show how CloudVision Portal can be used to deploy L3 EVPN instances on one switch, or many switches, using a CloudVision Portal configlet builder. A complete demonstration of how CloudVision Portal is used to deploy an EVPN instance and EVPN fabric can be found here The configlet builder example provided on the GitHub Arista repo covers L3 EVPN deployments using physical interfaces as SVI as CE facing interface. The configlet builder example can be used on top of any EVPN underlay and overlay. Below is a step by step procedure which describes how to import...
Continue reading →

Deploying L2 and L3 services with Multiple Tenants on a Single Interface

The intention of this post is to provide a configuration example on how multiple tenants could be deployed on a single physical interface with a mix of multiple L2 and L3 EVPN services. Ponder the network in below diagram, where two EVPN end point switches have multiple tenants (Tenant A, B, C and D) connected on the same physical interface. The interface in this case is Ethernet3, at the respective sites. Tenant A and B want L2 EVPN services. Tenant C and D want L3 EVPN services. Please note that the IP core in the diagram could be a spine...
Continue reading →

Automating EVPN fabric deployment using CVP

To simplify and speed up the deployment of an EVPN fabric, CloudVision Portal can be a powerful tool to work with. The intention of this post is to divide this up into steps to simplify, qualify the actions steps needed and provide an example CloudVision Portal configlet builder to execute needed tasks in CloudVision. A complete demonstration of how CloudVision Portal is used to deploy an EVPN instance and EVPN fabric can be found here First of all, there needs to be a decision of which deployment model of EVPN underlay and overlay that suits the particular deployment being worked on....
Continue reading →

Automating L2 EVPN instances deployment using CloudVision Portal

The intention of this article is to show how CloudVision Portal can be used to deploy L2 EVPN instances on one switch, or many switches, using a CloudVision Portal configlet builder. A complete demonstration of how CloudVision Portal is used to deploy an EVPN instance and EVPN fabric can be found here The configlet builder example provided at GitHub Arista repo covers L2 EVPN deployments using MLAG, single interface, VLAN trunk, access VLAN, symmetric routing and asymmetric routing. The configlet builder example can be used on top of any EVPN underlay and overlay. Below is a step by step procedure is...
Continue reading →

EVPN Configuration – Layer 2 EVPN design with Type-2 routes

Introduction This document describes the operation and configuration of BGP EVPN with a VXLAN forwarding plane, for the construction of multi-tenant Layer 2 networks, termed L2VPNs within this document, over a layer 3 leaf-spine network. The configuration and guidance within the document unless specifically noted are based on the platforms and EOS releases noted in the table below Platform Software Release 7050X Series EOS release 4.18.1 7050X2 series EOS release 4.18.1 7060X Series EOS release 4.18.1 7160 series EOS release 4.18.1 7280R/7500R EOS release 4.18.1   Leaf spine underlay architecture EVPN with a VXLAN forwarding plane provides the ability to...
Continue reading →