Configure and Verify EVPN/VxLAN in Multisite Environment

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Updated:July 27, 2023

Document ID:215722

Bias-Free Language

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Introduction

This document describes how to configure and verify Ethernet VPN/ Virtual Extensible LAN Multisite Environment with Cisco Nexus 9000 series switches.

Prerequisites

Requirements

Cisco recommends that you have knowledge of these topics:

Multiprotocol Label Switching (MPLS) Layer 3 VPN
Multiprotocol- Border Gateway Protocol (MP-BGP)
Ethernet VPN (EVPN)

Components Used

The information in this document is based on these software and hardware versions:

leaf1#	N5K-C5672UP-16G-SUP	system: version 7.3(0)N1(1)
leaf2#	N9K-C92160YC-X	NXOS: version 9.2(3)
spine1#	N9K-C9396PX	NXOS: version 9.2(3)
spine2#	N9K-C9396PX	NXOS: version 9.2(3)
MultisiteBG1#	N9K-C93108TC-EX	NXOS: version 9.2(3)
MultisiteBG2#	N9K-C93108TC-FX	NXOS: version 9.3(1)
multisitespine2#	N9K-C9372TX-E	NXOS: version 9.2(3)
Multistespine1#	N9K-C92160YC-X	NXOS: version 9.2(3)
MultisteLeaf1#	N9K-C93108TC-EX	NXOS: version 7.0(3)I7(5)

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.

Related Products

Minimum software and hardware requirements EVPN Multi-Site border gateway.

Item	Requirement
Cisco Nexus hardware	● Cisco Nexus 9300 EX platform
	● Cisco Nexus 9300 FX platform
	● Cisco Nexus 9332C platform
	● Cisco Nexus 9364C platform
	● Cisco Nexus 9500 platform with X9700-EX line card
	● Cisco Nexus 9500 platform with X9700-FX line card
Cisco NX-OS Software	Cisco NX-OS Software Release 7.0(3)I7(1) or later

The hardware and software requirements for the Site-Internal nodes of a Virtual Extensible LAN (VXLAN) BGP EVPN site remain the same as those without the EVPN Multi-Site BGW

Background Information

The data center is a resource pool that contains - computational power, storage, and necessary applications to support any business environment. Proper planning of the data center infrastructure design is vital. Now see what are the critical requirements and how they overcome. Modern IT infrastructure and data center deployments are in need of HA, ability to scale at a faster rate, high performance, and always ON.

A few explored vital requirements in DC Design/Architecture space:

Port Density, is improved by FEX.
Compute Capacity is improved by Hardware Virtualization (UCS).
Access layer uplink bandwidth is improved by FI, Port-Channel.
Chassis-Level Redundancy is improved by vPC.
SDN fabric is improved by ACI - automating underlay and overlay in a fabric.
Rapid deployment and supporting new services are improved by DCNM.
The bandwidth requirement for long haul applications is improved by dark fiber or wavelength service.
Over all geographical redundancy and scaling are key attributes for throbbing/scaling out data center environment, Multi-Site VxLAN/EVPN helps us to have better DCI solutions.

How is Multi-Site Helpful

External connectivity includes the connection of the data center to the rest of the network: to the Internet, the WAN, or the campus. All options provided for external connectivity are multitenant aware and focus on Layer 3 transport to the external network domains.

EVPN is a next-generation all-in-one VPN solution.
It not only does the job of many other VPN technologies but is better too.
Integration with Legacy Networks.
Selective Advertisement/Extension:
- Extend the only L2 - Specific VLANs/Subnets that can be extended using Type-2 routes.
- Extend the only L3 - Specific L3 domains can be extended using Type-5 routes.
Auto-discovery of redundancy group using Type-4 routes.
Aliasing, Mass Withdraw of addresses, SH/AA MH Indication using Type-1 routes.
Auto-discovery of multicast tunnel endpoints and MCAST tunnel type using Type-3 routes.

Other Benefits

• Workload Balancing across data centers and clouds.

• Proactive response to disruptions – mitigates risks of Approaching disasters, viz. hurricanes, floods, and so on.

• Data center maintenance and migrations - Planned events scheduled over a period of time, Integration with Legacy Networks.

• Backup and Disaster Recovery aaS.