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Web OS 10.0 Application Guide
Figure 16-5
1.
An SSL Hello handshake occurs between Client 1 and Server 1 via the Web switch.
2.
An SSL session ID is assigned to Client 1 by Server 1.
3.
The Web switch records the SSL session ID.
4.
The Web switch selects a real server based on the existing SLB settings.
As a result, subsequent connections from Client 1 with the same SSL session ID are directed to
Server 1.
Client 1
Client 2
Figure 16-5 SSL Session ID-Based Persistence
5.
Client 2 appears to the switch to have the same source IP address as Client 1 because they
share the same proxy firewall.
However, the Web switch does not automatically direct Client 2 traffic to Server 1 based on the
source IP address. Instead an SSL session ID for the new traffic is assigned. Based on SLB set-
tings, the connection from Client 2 is spliced to Server 3.
As a result, subsequent connections from Client 2 with the same SSL session ID are directed to
Server 3.
n
438
Chapter 16: Persistence
illustrates persistence based on SSL session ID as follows:
Firewall
Internet
Web Server
Farm
212777-A, February 2002
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