HP e-Commerce / XML director server appliance sa8250 - Users Guide

C H A P T E R 6 HP e-Commerce/XML Director Server Appliance SA8250 User Guide
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Scenario 3:
Routing
Outbound Data
Away from the
SA8250 for
OPR
You can configure the SA8250 to direct outbound data from the
fulfillment servers to bypass the SA8250. Most requests to servers
elicit a disproportionate amount of return data. Under some
circumstances, it is desirable to avoid routing such volumes of
content through the SA8250 as it returns to the client.
The SA8250’s Out of Path Return (OPR) mode removes it from the
return path to the client. OPR sends requests to a back-end server and
allows the server to respond through its own default gateway—thus
bypassing the SA8250 altogether. OPR requires that the server's
loopback adapter be installed and configured with the VIP as an alias,
and that the server be programmed with a default gateway address
other than that of the SA8250.
This diagram shows the network configuration for scenario 3.
Network Configuration for Scenario 3
This diagram shows the data flow for scenario 3.
Data Flow for Scenario 3
Client
Server
SA8250
Switch
Router
Internet
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