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Chapter 1

Preparing to Install Standalone CGTP Without the Reliable Boot Service

Before you manually install standalone CGTP without the Reliable Boot Service, define the topology of your standalone nodes and verify that you have the necessary prerequisites.

For more information, see these sections:


Note - Make certain that you understand the introductory material in the Preface before proceeding.


Defining the Topology

CGTP provides reliable transport by duplicating packets and sending the duplicates along two networks, where one of these networks is redundant. For an overview of CGTP, see "Cluster Addressing and Networking" and "Carrier Grade Transport Protocol" in the Netra High Availability Suite Foundation Services 2.1 6/03 Overview.

Before configuring standalone CGTP, choose your topology. To minimize data loss, use a star topology as shown in Figure 1-1. This topology uses two identical, but physically distinct, redundant-100 Mbps networks around switches.

Figure 1-1 Star Topology of Three Standalone CGTP Nodes

Figure of star topology where the NIC0 of three nodes are linked to switch 1 and the NIC1 of the same nodes are linked to switch 2.

Hubs can be used instead of switches, but using hubs might impact CGTP performance by increasing the collision rate and network latency. CGTP can be used to remove single points of failure. However, if redundant routes share switching equipment or communication links, these common network components might constitute single points of failure.

IP over ATM or IP over CompactPCI can be used with standalone CGTP because both mediums support the IP protocol. However, depending on the selected medium, standalone CGTP might not support broadcasts.

Avoid using IP gateways between nodes because gateways might introduce unpredictable latencies and additional packet fragmentation.

Packets that are sent to a CGTP address are replicated by CGTP. The mtu value represents the maximum size of packets that you can send to avoid asymmetry when fragmenting. For CGTP, the mtu value on the redundant physical networks must be the same for each interface.

Duplicate packets that reach the CGTP destination address are filtered by the filtering module.

Installation Prerequisites

Hardware requirements

  • A Sun4U™ architecture server

  • Two network interface cards

Operating environment

Solaris™ 9 operating system

Software requirements

CGTP packages and patches from the Foundation Services software distribution

See Standalone CGTP Patches and Packages.

Disk capacity

Minimum 1.5 Gbytes for the Solaris distribution

Free space

Minimum 1.5 Gbytes after the Solaris operating system has been installed

Standalone CGTP Patches and Packages

As part of the Foundation Services software delivery, you receive the following CGTP patches and packages.

Table 1-1 CGTP Patches and Packages

Patches and Packages

Description

Patches for CGTP on Solaris 9

See the Netra High Availability Suite Foundation Services 2.1 6/03 README

SUNWnhtp9 package

CGTP kernel drivers and modules

SUNWnhtu9 package

CGTP user-space components, configuration scripts, and configuration files

See your Sun contact for licensing information.

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