Nortel Networks WEB OS 212777 - Manual (Page 121)

Web OS 10.0 Application Guide
Chapter 6: Server Load Balancing n 121
212777-A, February 2002
Implementing Basic Server Load Balancing
Consider a situation where customer Web sites are being hosted by a popular Web hosting
company and/or Internet Service Provider (ISP). The Web content is relatively static and is
kept on a single NFS server for easy administration. As the customer base increases, the num-
ber of simultaneous Web connection requests also increases.
Figure 6-2 Web Hosting Configuration Without SLB
Such a company has three primary needs:
n
Increased server availability
n
Server performance scalable to match new customer demands
n
Easy administration of network and servers
Figure 6-3 Web Hosting with SLB Solutions
Web Server
NFS Server
Web Clients
Internet
Web Host
Router
As clients increase, the server becomes overloaded
Web Server Farm
NFS Server
Web Switch
A
B
C
Web Clients
Internet
Web Host
Routers
Layer 4 Switching &
Server Load Balancing
Layer 2
Switching
Layer 2
Switching