Cisco CATALYST 6000 Installation And Configuration Note page 7

Client-to-CSM-to-Server Traffic Flow
This section describes how the traffic flows between the client and server in a CSM environment.
(See
Figure 3 Client-to-Content Switching Module-to-Server Traffic Flow
.com
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3
2
DNS server
Note The numbers in
When you enter a request for information by entering a URL, the traffic flow is as follows:
You enter a URL. (For example, in
Step 1
The client contacts a DNS server to locate the IP address associated with the URL you entered.
Step 2
The DNS server sends the IP address of the virtual IP (VIP) to the client.
Step 3
The client uses that IP address (CSM VIP) to send the HTTP request to the CSM.
Step 4
The CSM receives the request with the URL, makes a load balancing decision, and selects a server. For
Step 5
example, in
its own VIP address with the address of the X server and forwards the traffic to the X server.
The CSM performs the Network Address Translation (NAT).
Step 6
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Figure 3.)
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VIP
Figure 3 refer to the steps in the following procedure.
Figure 3, the CSM selects a server (X server) from the www.fox.com server pool, replacing
Catalyst 6000 Family Content Switching Module Installation and Configuration Note
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X
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Y
Z
www.example.com
web server farm
Figure 3 you enter www.fox.com.)
Overview
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