SANGFOR AD INTRODUCTION Sangfor Technologies Company Limited

Application Delivery Network SANGFOR AD Link Load Balance Server Load Balance Business Intelligent analysis Application Delivery Market

Application Delivery Network

Network Infrastructure & Application Architecture Delivering Applications： External terminals access corporate distributed servers Internal terminals access public servers Internal terminals access corporate private servers

Reliability and Availability Network infrastructure Network Construction Target Reliability and Availability stable secure stable secure Application layer Network layer Network infrastructure

Lost of Commercial Prospect Low Employee Productivity Problems Encountered Lack of stability and availability Lost of Commercial Prospect Low ROI Low Employee Productivity The released business application performs a slow access and may even be inaccessible; Low customer satisfaction and lost of commercial prospect The multi-lines and multi- servers solutions don’t perform as well as IT expected; A lot of money is cost on expended bandwidth and servers ; Low ROI The slow response of internal information system causes long waiting time; Low employee productivity and complains to IT department

Roots of the Problems Links and servers are facing increasing pressure. Traditional routing devices are unable to smartly select the optimal link（ for outbound traffic and inbound traffic). Traffic is randomly distributed among the servers, regardless of the current load or health status of the servers, which may cause link failures. Take inbound traffic for example: Redundancy of links? 目前的问题:部署了多服务器多线路的环境，但是经常出现负载不均衡，导致一个服务器（链路）负载非常重，而另一个服务器（链路）确没有完全利用，分工不均匀；没有健康检查机制，没有负载均衡机制保证链路及服务器的冗余负载并选择最快的链路和最快的服务器响应。 Select the optimal server? AD Select the optimal link? Redundancy of servers?

Build the Application Delivery Network Sangfor Application Delivery AD的简单介绍及网络架构，带过即可。Garter的调查证明AND网络的重要性，sangfor ad will build the ADN for you

Sangfor AD Brings to You Improved capability of application delivery Reduce expenses of bandwidth and server investment Improved stability and availability 解决前面提到的AND网络面临的问题，从而带来价值 Avoid network interruption of application service caused by wrecking of network Improved user experience High ROI

Sangfor Application delivery

An Overview of Sangfor AD What can SANGFOR AD do? Link Load Balance; Server Load Balance Business intelligence analysis Intelligent DNS resolution DNS transparent proxy Intelligent routing HTTP redirection Unilateral acceleration SSL offload and acceleration Maintains sessions based on source IP address and cookies Link health checks; Server health checks transparent transfer flow from a failed link to a normal link Adds or quits server groups smoothly 技术点展示，带过即可。这些功能能带来怎样的价值，下面详细介绍 DO MORE THAN YOU EXPECTED

SANGOR AD solution BI analysis Link load balance Server load balance Sangfor Application Delivery Link load balance BI analysis SANGFOR AD product series gives a fast and stable application deliver performance, and demonstrably improves user experience AD的主要功能和作用 Server load balance

Link load balance

Link Load Balance Requests arrive at AD AD select a link according to the link’s health status and the speed of response 使用AD后的数据流程 Generates reports about link health, traffic, session and other statements

Key Technology—link Health Check 链路健康检查，当发现一条链路断了，则自动切换到正常的链路访问 Health check

Key Technology Intelligent DNS resolution   AD怎样选择最优线路？智能DNS技术返回最优链路的IP，选择最优的访问线路，选路依据为负载均衡算法 Clients access www.sangfor.com

Key Technology—Inbound traffic load balance balance arithmetic : polling, weighted poll, weighted minimum connections, weighted minimum flow, static nearest link, dynamic nearest link Which link? 入站流量选路算法：。。。。 balance arithmetic

Key Technology—outbound traffic load balance balance arithmetic : polling, intelligent routing, weighted minimum flow, dynamic nearest link, link congestion protection Which link? 入站流量选路算法：。。。。 balance arithmetic

Feathered Technology DNS transparent proxy: By the agent of DNS queries, Sangfor AD evenly assign the users’ access request to the internet links(regardless of the DNS address the internal users are using) ,ensure efficiency of resource use while taking into account the user's access speed, opposed to traditional link load algorithm.   不管内网用户的DNS服务器选择的是哪个ISP的，AD均可以进行透明代理，由AD负载算法选择最优链路

Feathered Technology--- Unilateral acceleration Enhance the user's access speed; Speed up network transmission speed by improving the TCP transmission mechanism; Do not need to install any client software or plug-ins;  单边加速，通过改进TCP算法实现 Test data from “Network World”

Unilateral acceleration Test data in the simulate network environment   Sending 10MB file on 3Mbps private line latency（ms） PLR（%） transmission rate（before）（KB/s） transmission rate（after） （KB/s） time-consuming （before） (s) （after） local network environment(ideal) 20 0.1 364 362 28 Remote network environment(non-ideal) 250 2 44.367 115.33 234.66 89.66 Remote network environment(poor) 5 24.13 87.23 426.67 117.67 Sending 30MB file on 3Mbps private line 1218.56 1208.32 8.4 8.5 43.17 111.67 237.67 92 24.87 86.23 385 119 图表是发送10M文件的数据表。需要向客户展示的比较数据为下面四条（纵向比较）

transmission rate（before）（KB/s） Test data in the actual network environment 1MB file transmission rate（before）（KB/s） transmission rate （after）（KB/s） speed-up ratio Thailand 1MADSL 22.33 25.53 1.14 Singapore 6.10 13.70 2.24 Hongkong 4M 228.67 387.33 1.69 Shenzhen TD 33.97 46.67 1.37 England 8MAD 36.27 103.03 2.84 5MB file 20.30 54.07 2.66 3.29 14.43 4.39 222.67 216.00 0.97 40.80 54.73 1.34 3.13 分别为发送1M和5M的折线图。斜率越高表示加速倍率越大。整理速率提升，且文件越大 ，加速效越好

Technical Benefits Sangfor AD link load balance 价值：链路稳定性；链路访问快速性 Avoid link failure to ensure network stability Link health check from a failed link to a normal Transparently transfer flow Optimize bandwidth utilization and enhance the user's access speed; link overloading slow response caused by Link load balancing avoid access Choose the fastest link to without any agent or plug-in Unilateral acceleration 价值：链路稳定性；链路访问快速性 Sangfor AD link load balance

Server load balance

Server Load Balance Request arrives at AD AD select a server according to the server’s health status and the speed of response 服务器负载数据流处理走向 Generate reports about access preference, geographical distribution and other statement

Key Technology—Server health checks Checks server health based on SNMP, ICMP, UDP, TCP, HTTP, or as customized by the user. applications 1 2 3 New connection request YSE YES NO 服务器健康检查 1 2 3

Key Technology—Server load balance balance arithmetic : polling, weighted poll, URL hash algorithm , weighted minimum connections, URL hash, dynamic feedback, fastest response balance arithmetic 服务器负载均衡算法选择最优服务器 Which server to access？

Feathered Technology SSL offload/acceleration Speed up the server response time, reduce the cost of hardware investment   将SSL 加密转移到AD设备上，减轻服务负荷，加快服务器响应速度，并减少服务器硬件投资

Optimize server utilization and enhance the servers’ response time Technical Benefits Avoid service interruption to enhance service stability and availability Server health check Transparently transfer flow from a failed server to a normal server Session maintenance Optimize server utilization and enhance the servers’ response time Server load balancing to avoid slow response caused by server overloading Allocate the request to the most suitable server to improve access speed SSL offload to speed up response time as well as reduce hardware investment 这些技术带来哪些价值？服务稳定，防止服务中断；提高服务器响应速度

Business Intelligence Analysis

Business Intelligence Analysis Link status monitoring Provide the link ‘s up and down traffic, utilization, session connections, application distribution, IP access number and other statistical analysis report Server status monitoring Provide the server's flow distribution , connection, server health status, the average response time of each connection and other statistical analysis report Business Intelligence Analysis Provide the time distribution rule, geographical characteristics, and the service access habits of resource visitors

Business Intelligence Analysis

Technical Benefit Enable customers to precisely understand the load and health status of multiple links, and thus design future link deployment plans Enable customers to understand servers’ loads and health states, and thus optimize server utilization strategies, server deployment methods, and server resource use Allowing the enterprises and institutions to adjust business processes, product design, business strategies, and so on, to guide business decisions and ensure a high customer satisfaction. 价值：链路稳定性；链路访问快速性

Application Delivery Market

Application Delivery Market 解决前面提到的AND网络面临的问题，从而带来价值

Market Analysis Who are the leaders? F5, CITRIX CITRIX is catch up F5 with annual increasing rate Who are kicked out from the Garter Magic Quadrant in the past two years? Juniper networks; Akamal Technologies; Nottel Networks, etc; Who are the new comers in the past two years? Barracuda,Brocade,A10 Brocade has showed its potentialities 价值：链路稳定性；链路访问快速性 SANGFOR Launched AD Product in May，2010

Traditional Target Market ISP Finance Internet ICP SANGFOR’S Target Market Large enterprises Government Education Energy 价值：链路稳定性；链路访问快速性

Sangfor’s Advantages High ROI: Integrating Server Load Balance and Link Load Balance with reasonable price Fastest: Unilateral acceleration without any agent or plug-in accelerate speed in non-ideal network environment； SSL offload to accelerate the response of servers Intelligence: Business intelligence analysis visualization : Link status monitoring/server statue monitoring 价值：链路稳定性；链路访问快速性