Nortel Networks WEB OS 212777 - Manual (Page 408)

Web OS 10.0 Application Guide
408 n Chapter 15: Content Intelligent Switching
212777-A, February 2002
Figure 15-6 URL Hashing for WCR
Example 2: Hashing on the Host Header Field Only
In this example, URL hashing is disabled. If you use the Host header field to calculate the hash
key, the same URL request goes to the same cache server:
n
Client 1 request http://www.nortelnetworks.com is directed to cache server 1.
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Client 2 request http://www.nortelnetworks.com is directed to cache server 1.
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Client 3 request http://www.nortelnetworks.com is directed to cache server 1.
Example 3: Hashing on the Source IP address
In this example, URL hashing is disabled. Because the host header field does not exist in the
HTTP header, the source IP address is used as the hash key and requests from clients 1, 2, and
3 are directed to three different cache servers as shown below.
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Client 1 request http://www.nortelnetworks.com is directed to cache server 1.
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Client 2 request http://www.nortelnetworks.com is directed to cache server 2.
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Client 3 request http://www.nortelnetworks.com is directed to cache server 3.
Alteon Web Switch
Cache server farm
http://www.nortelnetworks.com
Clients
2
3
1
1
2
3
Internet