The Fast-Track Guide to VXLAN BGP EVPN Fabrics: Implement Today’s Multi-Tenant Software-Defined Networks

Table of Contents
About the Author
About the Technical Reviewer
Acknowledgments
Introduction
Chapter 1: Introduction to Spine-and-Leaf Topologies
	Spine-and-Leaf Architecture
		Spine-and-Leaf Layers
		Redundancy in Spine-and-Leaf Topologies
		Leaf Redundancy
	Underlay Networking
	Overlay Networking
	Spine-and-leaf Fabric Traffic Flow
		Broadcast Unknown Unicast and Multicast (BUM Traffic)
		Underlay Multicast
		Underlay Routing
		Overlay Routing
		Layer 3 Virtual Network Identifier (L3VNI)
		Multipod Spine-and-Leaf VXLAN Topology
		Multisite Spine-and-Leaf VXLAN Topology
		The VXLAN Border Leaf
		External Path Redundancy in Spine-and-Leaf VXLAN BGP EVPN
Chapter 2: Logical Components of a VXLAN BGP EVPN Spine-and-Leaf Architecture
	Configuring the IGP
	OSPF Point-to-Point for the Underlay (Option 1)
	Template-Based Deployment
	IS-IS for the Underlay (Option 2)
	Multicast and Rendezvous Points (RP)
		Option 1: Anycast RP
		Option 2: Phantom RP
	BGP L2VPN EVPN Address Family
		BGP EVPN Route Reflectors
		LEAF EVPN Configuration
Chapter 3: Encapsulating Layer 2 over Layer 3 with VXLAN
	VTEPs and NVE
	EVPN Route-Targets
	L2VNI and L3VNI
		16,777,215 VNIs = VXLAN Networks?
	Tenant VRF Role in VXLAN
	VXLAN Fabric Tenant Routing with L3VNIs
	EVPN Route Types
		EVPN Type-2
		EVPN Type-3
		EVPN Type-5
	VXLAN Packet Flow
		Step 1: Initial request from the source device to the network
		Step 2: Source leaf forwards the request via L3VNI to its destination
		Step 3: Packet flows via L3VNI using the spines as the transit path
		Step 4: Packet flows via L3VNI using the spines as the transit path
Chapter 4: VXLAN Fabric Features and Functionalities
	Fabric Anycast Gateways
	Multitenancy with VRFs
		Tenant: Web Servers
		Tenant: Clients
		Tenant: DMZ
		Static Routing in Tenant VRFs
		Static Route Redistribution in EVPN Using Tags
		Static Route Redistribution in EVPN with Route Tags
	BGP IPv4 Unicast Address Family
	BGP Route Leaking Between VRFs
		Route Leaking Configuration
		Verifying the Configuration
Chapter 5: VXLAN Fabric to External Network Connectivity
	BGP to OSPF Route Redistribution
		Campus Core
		Interface Redistribution to OSPF
		OSPF Inbound Route Filtering Configuration
		Asymmetric Route Issues in VXLAN BGP EVPN
		Symmetric Routing in VXLAN BGP EVPN
	OSPF to BGP Route Redistribution
		Routes Before Changes
	Dynamic Routing Protocols Under VRFs
		Tenant: Italy
			Enabling BGP for a Tenant VRF
			Enabling OSPF for a Tenant VRF
		Tenant: France
	Default-Route Advertisement
Chapter 6: VXLAN Fabric Topology Designs
	Multipod VXLAN Architecture
		Multipod Integration
		Configuring a Multipod VXLAN Fabric
			Step 1: Configure the Underlay Link Between DC1 and DC2 on Spine-01
			Step 2: Configure the BGP EVPN Multihop Peering Between Spines
		EVPN L3VNI Routing in Multipod VXLAN
		EVPN L3VNI Multipod Configuration
	Multisite VXLAN Architecture
		Border Gateway Leaf or BGW
		EVPN Multisite Fabric Tracking
		EVPN Multisite Data Center Interconnect Tracking
		Border Gateway BGP Configuration
		Validate Multisite VXLAN Communication
	Ingress Replication VXLAN Architecture
		A VXLAN BGP EVPN Fabric Without Spines?
		Configuring IR/HER
		Sample IR/HER Leaf Configuration Template
		IR/HER VXLAN Fabric Without Spines
Chapter 7: VXLAN BGP EVPN Fabric Configuration Templates
	VXLAN Spine-and-Leaf Fabric (Stand-alone)
	VXLAN Multipod Fabric (DC1-DC2)
	VXLAN Multisite Fabric (Frankfurt-Munich)
	VXLAN Ingress Replication (Spineless)
Index