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Foundry Switch and Router Installation and Configuration Guide
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December 2000
Configuration Example
Suppose you configure a ServerIron in Los Angeles and third-party SLB in New York to serve VIP
209.157.22.249. For this example, also assume that you have a real server in Paris with the same IP address and
the server is directly attached to a Foundry Layer 3 Switch.
Suppose the DNS entry for this IP address maps the address to a site named www.foundrynet.com. When a web
client in Los Angeles enters this domain in their web browser, the web browser goes to the client’s local DNS to
resolve the name into an IP address. When the DNS returns the address to the web browser, the browser then
attempts to contact the HTTP port (usually TCP port 80) on the host with the IP address returned by the DNS.
Figure 26.1 shows an example of a globally-distributed SLB configuration in which the route health injection
feature is used.
Summary of Contents for Switch and Router
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