TCP/IPv6 Configuration and Management Manual (G06.29+, H06.03+, J06.03+)

Maximize the Benefit of the NonStop TCP/IPv6
Architecture
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-012
3-19
Configuration Example for the Hybrid Listening
Model
The lines starting the Distrib processes, starting with:
RUN DISTRIB /NAME $DIST1, NOWAIT, PRI 160, CPU 3/0
start a Distrib process in each of the processors. Note that the backup Distrib
processes do not share any processors with other Distrib processes. Running Distrib
processes in distinct processor pairs avoids potential port sharing conflicts in a failure
situation. (See Port Collision Considerations for Listening Processes on page 6-2.)
Configuration Example for the Hybrid Listening Model
This example demonstrates the hybrid listener model discussed in Hybrid Listener
Model on page 3-9 using iTP WebServer configured with round-robin filtering enabled.
This configuration example assumes that you have already configured the basic
subsystem. (See Section 1, Quick Start and Section 5, Example Illustrations and
Adding Features to the Basic Configuration for procedures for configuring the basic
subsystem.) This example only shows you how to configure the listening applications.
This configuration has four processors each running their own distributors. Each
distributor listens for connections and hands over the connections to the web servers
that it controls. In this configuration, each distributor has servers only in its own
processor. All the connections share the same IP address on the same G4SA, which in
turn uses round-robin distribution for incoming connections to the different processors.
Figure 3-9 on page 3-15 shows the round-robin feature in this configuration. An iTP
WebServer process is configured in each processor, bound to the same port, and is
round-robin filtering enabled. (See Round-Robin Filtering on page 2-6.)
Figure 3-11. Configuration Example for the Hybrid Listening Model: iTP
WebServer
Server
Server
Server
Server
Server
Server
Web
Servers
G4SA
Processor 0
Processor 1
Processor 2 Processor 3
Single IP Host
Server
Server
TCP/IP
Library
TCP/IP
Library
TCP/IP
Library
Round-Robin Distribution
Web
Servers
Web
Servers
Web
Servers
Distributor
Distributor
Distributor
Distributor
TCP/IP
Library
VST113.vsd