What is an evpn switch?

EVPN A new Ethernet service delivery model is introduced , It uses BGP by VXLAN The tunnel provides scalability 、 Interoperable end-to-end control plane solutions , This means that it is the 3 The third layer on the routing infrastructure 2 Layer virtualization provides a simpler solution .

EVPN Seen as the next generation of all in one VPN technology , So what is EVPN？ This article focuses on EVPN, Then introduce EVPN Switch .

What is? EVPN？

EVPN Represents Ethernet virtual private network , adopt IP or IP/MPLS The backbone network provides Ethernet multipoint services , It is a coverage solution , Used to pass the 2 Layer virtual bridge connects branches and other decentralized sites , Use shared network resources to provide logical separation between customers .

And others VPN Technologies such as IP VPN、VPLS、 Ethernet VPN The example is the same , stay PE（ Provider edge ） Configured on the router to keep logical service separation ,PE Routers are usually connected to CE（ Customer edge ） equipment , For example, host 、 Routers or Gigabit Ethernet switches .

then ,PE The router can go through MP-BGP（ multi-protocol BGP） Exchange messages , The encapsulated traffic can be in PE Forwarding between routers , It should be noted that , because EVPN Architecture and others VPN Technology has the same elements , therefore EVPN Can be seamlessly introduced and integrated into existing business environments .

Here is a typical EVPN application . Data Center 1 Of traffic from... Through the service provider's network MES1 Transferred to the MES2, Then the traffic reaches the data center 2.DCS1、DCS2、DCS3 and DCS4 It's the switch here .

chart 1： Typical EVPN chart .

What is? EVPN advantage ？

Deploy EVPN It brings many advantages .

• Fast convergence . When the link / When a node fails ,EVPN Fast convergence can be provided by revoking a single route associated with each failed Ethernet segment , No matter how many there are behind MAC/IP Address （ for example , There may be 10K Or more MAC）. such , Distal PE The device will switch to another in the redundancy group PE, Thus reducing the flow recovery time .
• Multi tenant support .EVPN Use mature BGP VPN Technology to separate tenants in the data center , Each tenant can be mapped to a unique VFR（ Virtual routing and forwarding ）, So as to provide the third part of its network traffic 3 Layer isolation .
• Effective traffic flow .EVPN By allowing the local leaf switch to respond to the host ARP（ Address resolution protocol ） Request to reduce broadcast traffic in the data center , Instead of forwarding these requests across the data center and creating expensive broadcasts , So as to make the flow more efficient .

Besides , Due to control plane MAC Study ,EVPN Can reduce unknown unicast flooding .

EVPN The switch has EVPN Functional network switch , These switches are compact 1U Rack top switch in shape 、Leaf Switch or Spine Switch . The series offers a variety of speed options , Include 10Gb Ethernet switch 、25Gb Ethernet switch 、40Gb and 100Gb network switch .N The series switch adopts no PHY Design , It has the characteristics of low delay and low power consumption , Provides stability 、 Reliable and safe 2 layer / The first 3 Layer switching services .

Besides , And support MLAG、VXLAN、SFLOW、BGP、OSFP、EVPN And so on , therefore EVPN Switches are ideal for data centers and high-end industrial fields .

chart 2：EVPN Switch

Conclusion

in summary , I believe you have a good idea of what EVPN, What is? EVPN The benefits of .