Cisco VXLAN Configuration

Chapter Overview

This section covers VXLAN configuration on Cisco platforms, including Nexus switches, ASR routers, and Catalyst switches. We'll cover both basic flood-and-learn and advanced BGP EVPN configurations.

Cisco VXLAN Platforms

Nexus 9000 Series

Primary VXLAN platform

  • Hardware VTEP support
  • BGP EVPN integration
  • ACI fabric support
  • Multi-site capabilities
ASR 9000 Series

Service provider platform

  • VXLAN gateway
  • DCI functionality
  • L3VPN integration
  • High-scale deployment
Catalyst 9000

Campus/Enterprise

  • SD-Access integration
  • SDA fabric
  • Policy enforcement
  • Zero-touch provisioning

Basic VXLAN Configuration

Nexus 9000 Basic Setup

# Enable required features
feature vn-segment-vlan-based
feature nv overlay
feature interface-vlan

# Configure loopback for VTEP
interface loopback0
  ip address 192.168.1.1/32
  ip pim sparse-mode

# Create NVE interface
interface nve1
  no shutdown
  source-interface loopback0
  member vni 10100
    mcast-group 239.1.1.100

# VLAN to VNI mapping
vlan 100
  vn-segment 10100

# SVI configuration
interface vlan100
  no shutdown
  ip address 192.168.100.1/24

BGP EVPN Configuration

EVPN Spine Configuration

# Enable BGP EVPN
nv overlay evpn

# BGP configuration
router bgp 65000
  router-id 192.168.1.100
  address-family ipv4 unicast
  address-family l2vpn evpn
    retain route-target all
  
# Spine configuration for leafs
  neighbor 192.168.1.1
    remote-as 65001
    update-source loopback0
    address-family ipv4 unicast
    address-family l2vpn evpn
      send-community extended
      route-reflector-client

EVPN Leaf Configuration

# Enable EVPN
nv overlay evpn

# BGP configuration
router bgp 65001
  router-id 192.168.1.1
  address-family ipv4 unicast
  address-family l2vpn evpn
  
  neighbor 192.168.1.100
    remote-as 65000
    update-source loopback0
    address-family ipv4 unicast
    address-family l2vpn evpn
      send-community extended

# EVPN instance
evpn
  vni 10100 l2
    rd auto
    route-target import auto
    route-target export auto

# Update NVE interface
interface nve1
  member vni 10100
    ingress-replication protocol bgp
Previous: Control Plane Comparison Next: Juniper Configuration

Juniper VXLAN Configuration

Juniper VXLAN configuration on QFX and MX series platforms with EVPN support.

Previous: Cisco Configuration Next: Arista Configuration

Arista VXLAN Configuration

Arista EOS VXLAN configuration with CloudVision integration and advanced features.

Previous: Juniper Configuration Next: Verification Commands

Verification Commands

Essential commands for verifying VXLAN operation across different vendor platforms.

Previous: Arista Configuration Next: Advanced VXLAN