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1 |© 2006 Citrix Systems, Inc.—All rights reserved.
CoxCONNECT Case Study:
Universal Access supported by a fully redundant infrastructure spanning multiple data centers
Keith Hubbard
Sr. Server Administrator
Chuck Coffman
Sr. Server Administrator
3 | © 2006 Citrix Systems, Inc.—All rights reserved.
Who Is Cox Communications ?
• Third largest cable company in America with 6.7 million customers and 23,000 employees nationwide
• Full service telecommunication provider• Analog and digital cable• Local and long distance telephone and voice over IP• High speed internet
• Annual revenues exceeding $10 Billion with interests in newspapers, television, radio, and automobile auctions
• Honored by J.D. Powers and Assoc. two consecutive years for outstanding customer service
4 | © 2006 Citrix Systems, Inc.—All rights reserved.
Cox Communications - Drivers
• Create faster, more reliable connections than traditional laptop/VPN solutions
• Create a “work from home” call center solution
• Improve security• Protect Intellectual property• Protect the platform
• Improve overall customer experience
• Create an “end to end”, centrally managed application delivery solution
5 | © 2006 Citrix Systems, Inc.—All rights reserved.
Cox Communications - Solutions
• Leverage in house Metro-Ethernet product to create physically redundant hosting sites
• Two Citrix NetScaler implementations• load balance Citrix sites • Compress and load balance Internal web applications
• Citrix Presentation Server 4 to publish applications
• Virtuozzo to virtualize call center switch software
• Citrix Access Gateway with Advanced Access Control • Increase security through Endpoint Analysis and Access
Rights Control• Extended Web Interface capabilities with Clientless Access
6 | © 2006 Citrix Systems, Inc.—All rights reserved.
Citrix NetScaler for Web Apps
• Implemented for internal IIS applications• Load Balanced applications• TCP optimization• Web Compression • Dynamic Caching• SSL Encryption
SQL 1IIS Web App 1
SQL 4
SQL 3
SQL 2
IIS Web App 2Lo
ad
Bal
anc
ed
Act
ive/
Pas
sive
Primary “Active” Netscaler
Secondary “Passive” Netscaler
Intranet
7 | © 2006 Citrix Systems, Inc.—All rights reserved.
NetScaler & Presentation Server
Data Center 1
`
END USER
NETSCALER #1
Data Center 2 NETSCALER #2
Active/Passive Failover LOAD BALANCE
CITRIX ACCESS GATEWAY #1
CITRIX ACCESS GATEWAY #2
LOAD BALANCE
AAC/WEB INTERFACE #1
AAC/WEB INTERFACE #1
Citrix Presentation Server 4.0
Server Farm
Active/Passive Failover
END POINT SCAN
Internet
Enhanced Site Redundancy and Load Balancing
Improves security and fault tolerance
8 | © 2006 Citrix Systems, Inc.—All rights reserved.
Cox Communication - Benefits
• “Work from Home” program• Complete call center functionality through Citrix• Reduce in house per cubicle cost by $16000 • Improved morale and efficiency of call center representatives
• Streamlined application access• Traditional published applications• Clientless access to web applications (does not require presentation
server license)
• Improved security• Endpoint analysis ensures users access from a clean system
• Results with NetScaler• Citrix infrastructure redundancy• 70% improvement to web application access and speed• More robust load balancing than Microsoft NLB!
9 | © 2006 Citrix Systems, Inc.—All rights reserved.
FIREWALL
HTTPS://INTERNET URL (PORT 443 ONLY)
192.XXX.XXX.X VIP FOR CITRIX ACCESS
GATEWAY
NETSCALER 1
DMZ LAN
UID
1
2
HPProLiantDL360
G5
CITRIX ACCESS GATEWAY 1
LAN
LAN
ADVANCED ACCESS CONTROL SERVER 1
WEB INTERFACE SERVER1
FIREWALL
NETSCALER 2
DMZ LAN
UID
1
2
HPProLiantDL360
G5
CITRIX ACCESS GATEWAY 2
LAN
ACTIVE/PASSIVE FAILOVER MODE
ACTIVE/PASSIVE FAILOVER MODE
LOAD BALANCED VIP FOR ACCESS GATEWAY
DEER VALLEY MSC
Data Center 2
192.xxx.xx.x
ADVANCED ACCESS CONTROL SERVER 2
LOAD BALANCED VIP FOR WEB INTERFACE
192.xxx.xx.x WEB INTERFACE SERVER2
CITRIX PRESENTATION SERVER FARM LOAD BALANCING
PUBLISHED APPLICATIONS AND DESKTOPS
Data Center 1
PRESENTATION SERVERS PRESENTATION SERVERS
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