Disaster-Aware Dynamic Routing for SDN-Based Active-Active Data Center Networks

Data center networks heavily rely on their physical infrastructures. The large-scale disasters may destroy infrastructures and then cause huge data loss or connectivity disruption for data center networks. Software-Defined Networking (SDN) technology can control the network without depending on the physical equipment. Thus SDN facilitates network programmability and opens up new ways to design disaster-resistant networks. Based on the SDN technology, we propose a disaster aware dynamic routing (DADR) scheme. When a disaster signal is received, this triggers the event that the data center router stops advertising via BGP. And the SDN controller recalculates the current optimal routing path of the now-active data center to deal with double traffic. In this paper, we show the design and implementation of our scheme. Our results show that the packet loss rate and delay in the network significantly reduce when a disaster occurs.