1. SANGFOR AD INTRODUCTION
Sangfor Technologies Company Limited

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

3. Application Delivery Network

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

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

6. 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

7. 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?

8. 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

9. 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

10. Sangfor Application delivery

11. 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

12. 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

13. Link load balance

14. 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

15. 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

16. 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

17. 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

18. 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

19. 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

20. 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”

21. 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
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）

22. 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

23. 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

24. Server load balance

25. 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

26. 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

27. 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？

28. 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

29. 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

30. Business Intelligence Analysis

31. 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

32. Business Intelligence Analysis

33. 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

34. Application Delivery Market

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

36. 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

37. 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

38. 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