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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: Defining the Topology Installation Prerequisites 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 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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