Abstract：
This paper analyzes the remote disaster recovery across resource pools based on the BGP+EVPN+vpnv4 technology. In order to achieve the goal of remote disaster recovery of cloud service, it describes how to design the topology and the scheme selection
of VPN technology crossing multiple domains. It gives the general configuration templates for EVPN and L2VPN, and gives guidance suggestions on how to configure BGP routing policies and configure distributed gateway before migration of running services.
Finally, it makes a comparative analysis of remote migration of virtual machines across resource pools based on cloud platform,
which provides guidance for the investigation of migration problems and remote disaster recovery of business systems.
2021, Vol. 1 
