A Novel Load Balancer for Scalable Multi-NAT  

作　　者：SONG Linjian WU Jianping CUI Yong Yiu L. Lee 

机构地区：[1]Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China [2]Comcast Corporation, Pennsylvania, USA

出　　处：《Chinese Journal of Electronics》2013年第4期712-716,共5页电子学报（英文版）

摘　　要：Due to the upcoming IPv4 address exhaus- tion, the transition from IPv4 to IPv6 becomes an urgent problem restricting the growth of Internet. Multi-NAT, which is desired in large scale IPv4-IPv6 coexistent net- work, has inherent difficulties in the stateful traffic bal- ancing and failure recovery. The existing schemes cannot handle them due to the absence of state synchronization. In this paper we propose a novel Load balancer （LB） to build a Scalable multi-NAT （SMNAT） in large scale net- work for various IPv4-IPv6 coexistent scenarios. The LB is specifically designed to have a translation pattern re- lated hash keys and load-balance bi-directional traffic in two modes. Additionally an Adaptive reassigning algo- rithm （ARA） running in LB is presented to schedule flows adaptively to reduce the cost of state synchronization as well as guarantee the performance in load balancing. Com- paring SMNAT with the existing load balancing schemes, the simulation result shows that our SMNAT outperforms other schemes and meets the goals of large scale NAT.

关 键 词：Load balancer  Stateful traffic Multi- network address translation （MNAT）  Carrier grade NAT （CGN）  Large scale IPv4-IPv6 coexistence. 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TP393.08[自动化与计算机技术—计算机科学与技术]