Design And Implementation Of MLAG Technology Based On EVPN

With the increasing popularity of cloud computing technology in the world,it has become the regular scale of the current enterprise IT planning,and network virtualization technology relating to a large-scale cloud computing has been adopted and applied in the basic technology.With the dynamic migration of virtual machines to any target location in the network,the rapid growth and dynamic migration of virtual machines has become a mature routine business.At this time,the mainstream Overlay technology represented by VXLAN emerges as the times require.VXLAN is a new network virtualization technology.At the control level,it uses MP-BGP technology to disseminate EVPN routing messages.The data plane is based on IP network and encapsulated by using MAC in UDP method.The purpose is to achieve that users' original messages can be disseminated across three layers of network in different places,which greatly reduces the difficulty and cost of deployment of the network.However,with the increase of the scale of cloud tenants and the flexibility of demand,the network bandwidth and reliability of cloud computing network are challenged more.Nevertheless.Based on the EVPN protocol,this paper mainly designs and implements the MLAG technology at the forwarding level,and builds environment to test and verify the function and performance.Firstly,the background of MLAG technology and the research status at home and abroad are systematically introduced.Then it briefly introduces some basic concepts of overlay technology such as VXLAN technology,EVPN protocol,BGP protocol,and describes their network model,characteristics and technical advantages in detail.Secondly,overview the requirement of this topic,and list the software functions and the system cases that need to be tested.Then,briefly describe the system framework and designing scheme.Then the system design part is introduced in detail from MLAG address creation,MAC synchronization,ARP synchronization and other aspects.The implementation part of Mlag system is also described in detail.The discharge forwarding situation after the function realization is analyzed in normal and fault scenarios.Finally,the test scheme and environment of the system are proposed,and then it briefly describes the test contents and results.Through testing,the MLAG technology designed improves the link bandwidth function on the basis of EVPNprotocol,and at the same time improves the link reliability from the single board level to the device level.As a result,it avoids the impact of single point failure and single point upgrade of equipment,and thus improves the reliability of the whole cloud computing network.